TY  - CONF
AU  - Jolić, Anđelka
AU  - Miličević, Dejan
AU  - Rogić Miladinović, Zorana
AU  - Suljovrujić, Edin
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12407
AB  - Polyolefins (POs) are currently the most widely used engineering plastics due to their
relatively low cost, durability, and ease of processing. A feature such as inertness makes
polyolefins suitable for applications such as food packaging and medical devices. For
the purpose of this study, polyethylene (PE) with good rigidity, hardness, impact
strength, environmental stress cracking resistance, and excellent processability, and
polypropylene (PP), with high fluidity and very good transparency, were selected
polyolefins [1,2]. Knowing that most of the polymer applications are strongly dependent
on the initial state of the products, i.e., their morphology, thermal properties, and
crystallinity, it is possible to obtain a great variety of morphologies and supermolecular
formations by varying different conditions in the preparation process, e.g. cooling
conditions during the crystallization process from the melt.
One of the aims of this work was to compare the results obtained for two different
methods of sample preparation, quenching, and slow cooling. Initial preparation was
performed for selected POs by rapid quenching in ice water and slow air cooling after
compression molding. Further, the prepared samples were characterized by SEM,
WAXD, FTIR, and mechanical measurements.
The obtained results indicated that PP is much more sensitive to the method of sample
preparation than PE, as well as that the initial preparation of samples plays a decisive
role in the final properties of materials for polymeric medical devices.
PB  - Belgrade : Serbian Chemical Society and Serbian Young Chemists’ Club
C3  - 8th Conference of Young Chemists of Serbia : Book of abstracts
T1  - A comparative study of two different methods of sample preparation for polyolefins commonly used in medical devices
SP  - 91
EP  - 91
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12407
ER  - 

@conference{
author = "Jolić, Anđelka and Miličević, Dejan and Rogić Miladinović, Zorana and Suljovrujić, Edin",
year = "2022",
abstract = "Polyolefins (POs) are currently the most widely used engineering plastics due to their
relatively low cost, durability, and ease of processing. A feature such as inertness makes
polyolefins suitable for applications such as food packaging and medical devices. For
the purpose of this study, polyethylene (PE) with good rigidity, hardness, impact
strength, environmental stress cracking resistance, and excellent processability, and
polypropylene (PP), with high fluidity and very good transparency, were selected
polyolefins [1,2]. Knowing that most of the polymer applications are strongly dependent
on the initial state of the products, i.e., their morphology, thermal properties, and
crystallinity, it is possible to obtain a great variety of morphologies and supermolecular
formations by varying different conditions in the preparation process, e.g. cooling
conditions during the crystallization process from the melt.
One of the aims of this work was to compare the results obtained for two different
methods of sample preparation, quenching, and slow cooling. Initial preparation was
performed for selected POs by rapid quenching in ice water and slow air cooling after
compression molding. Further, the prepared samples were characterized by SEM,
WAXD, FTIR, and mechanical measurements.
The obtained results indicated that PP is much more sensitive to the method of sample
preparation than PE, as well as that the initial preparation of samples plays a decisive
role in the final properties of materials for polymeric medical devices.",
publisher = "Belgrade : Serbian Chemical Society and Serbian Young Chemists’ Club",
journal = "8th Conference of Young Chemists of Serbia : Book of abstracts",
title = "A comparative study of two different methods of sample preparation for polyolefins commonly used in medical devices",
pages = "91-91",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12407"
}

Jolić, A., Miličević, D., Rogić Miladinović, Z.,& Suljovrujić, E.. (2022). A comparative study of two different methods of sample preparation for polyolefins commonly used in medical devices. in 8th Conference of Young Chemists of Serbia : Book of abstracts
Belgrade : Serbian Chemical Society and Serbian Young Chemists’ Club., 91-91.
https://hdl.handle.net/21.15107/rcub_vinar_12407

Jolić A, Miličević D, Rogić Miladinović Z, Suljovrujić E. A comparative study of two different methods of sample preparation for polyolefins commonly used in medical devices. in 8th Conference of Young Chemists of Serbia : Book of abstracts. 2022;:91-91.
https://hdl.handle.net/21.15107/rcub_vinar_12407 .

Jolić, Anđelka, Miličević, Dejan, Rogić Miladinović, Zorana, Suljovrujić, Edin, "A comparative study of two different methods of sample preparation for polyolefins commonly used in medical devices" in 8th Conference of Young Chemists of Serbia : Book of abstracts (2022):91-91,
https://hdl.handle.net/21.15107/rcub_vinar_12407 .

TY  - JOUR
AU  - Đorđević, Katarina Lj.
AU  - Miličević, Dejan S.
AU  - Galović, Slobodanka
AU  - Suljovrujić, Edin H.
AU  - Jaćimovski, Stevo K.
AU  - Furundžić, Draško
AU  - Popović, Marica N.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10196
AB  - The paper presents a generalized model of the photothermal response of a polymer sample. The model is based on a linear non-Fourier heat conduction equation that considers thermal memory and complex heat capacity. The physical meaning of imaginary heat capacity is discussed from the point of view of non-equilibrium thermodynamics. The derived heat conduction equation introduces two additional dynamic properties of a medium to time-varying heat conduction: inertial and kinetic relaxation time. The influence of these relaxation times on photothermal response is analyzed. It is shown that the derived model could explain the measured photoacoustic response of different semi-crystalline polyethylenes (PEs). The obtained results show that photothermal techniques can be employed to estimate relaxation phenomena in polymeric materials when the frequency scale of the experiment is greater than the inverse value of any relaxation time. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
T2  - International Journal of Thermophysics
T1  - Photothermal Response of Polymeric Materials Including Complex Heat Capacity
VL  - 43
IS  - 5
SP  - 68
DO  - 10.1007/s10765-022-02985-3
ER  - 

@article{
author = "Đorđević, Katarina Lj. and Miličević, Dejan S. and Galović, Slobodanka and Suljovrujić, Edin H. and Jaćimovski, Stevo K. and Furundžić, Draško and Popović, Marica N.",
year = "2022",
abstract = "The paper presents a generalized model of the photothermal response of a polymer sample. The model is based on a linear non-Fourier heat conduction equation that considers thermal memory and complex heat capacity. The physical meaning of imaginary heat capacity is discussed from the point of view of non-equilibrium thermodynamics. The derived heat conduction equation introduces two additional dynamic properties of a medium to time-varying heat conduction: inertial and kinetic relaxation time. The influence of these relaxation times on photothermal response is analyzed. It is shown that the derived model could explain the measured photoacoustic response of different semi-crystalline polyethylenes (PEs). The obtained results show that photothermal techniques can be employed to estimate relaxation phenomena in polymeric materials when the frequency scale of the experiment is greater than the inverse value of any relaxation time. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.",
journal = "International Journal of Thermophysics",
title = "Photothermal Response of Polymeric Materials Including Complex Heat Capacity",
volume = "43",
number = "5",
pages = "68",
doi = "10.1007/s10765-022-02985-3"
}

Đorđević, K. Lj., Miličević, D. S., Galović, S., Suljovrujić, E. H., Jaćimovski, S. K., Furundžić, D.,& Popović, M. N.. (2022). Photothermal Response of Polymeric Materials Including Complex Heat Capacity. in International Journal of Thermophysics, 43(5), 68.
https://doi.org/10.1007/s10765-022-02985-3

Đorđević KL, Miličević DS, Galović S, Suljovrujić EH, Jaćimovski SK, Furundžić D, Popović MN. Photothermal Response of Polymeric Materials Including Complex Heat Capacity. in International Journal of Thermophysics. 2022;43(5):68.
doi:10.1007/s10765-022-02985-3 .

Đorđević, Katarina Lj., Miličević, Dejan S., Galović, Slobodanka, Suljovrujić, Edin H., Jaćimovski, Stevo K., Furundžić, Draško, Popović, Marica N., "Photothermal Response of Polymeric Materials Including Complex Heat Capacity" in International Journal of Thermophysics, 43, no. 5 (2022):68,
https://doi.org/10.1007/s10765-022-02985-3 . .

TY  - JOUR
AU  - Radoičić, Marija
AU  - Ćirić-Marjanović, Gordana
AU  - Miličević, Dejan
AU  - Suljovrujić, Edin
AU  - Milošević, Milica
AU  - Kuljanin Jakovljević, Jadranka
AU  - Šaponjić, Zoran
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11893
AB  - Structural, conductive and dielectric properties of hybrid Polypyrrole (PPy)-TiO2 nanocomposite-coated polyamide fabric (PA-PPy/TiO2) synthesized by in-situ oxidative polymerization of pyrrole on the surface of polyamide in the presence of colloidal TiO2 NPs (d ~ 4.5 nm) have been studied. Raman spectra confirmed salt form of PPy in both neat PPy and PPy/TiO2-coated PA fabric and indicated its complete coverage. SEM/EDX analysis confirmed presence of TiO2 NPs and changes in granular structure of PPy deposited on the surface of PA fiber depending on the amount of TiO2 NPs. The PA-PPy/TiO2 nanocomposite sample with lowest content of TiO2 NPs (6.79 At.% Ti) showed highest conductivity (~10−6 S/cm) and dissipation factor (tan δ) in the entire frequency range. The lowest amount of TiO2 NPs in the PA-PPy/TiO2 nanocomposite induced two to four orders of magnitude higher tan δ value, compared to neat PPy covered PA fabric, depending on the frequency range. Frequency dependence of real (ϵ′) and imaginary part (ϵ″) of the complex permittivity for neat PA and PPy/TiO2-coated PA fabrics follow the trend of changes in dissipation factor for the same TiO2 NPs concentrations. The presence of TiO2 NPs could be exploited for tuning the conductive and dielectric properties of a conductive layer.
T2  - Composite Interfaces
T1  - Fine-tuning of conductive and dielectric properties of polypyrrole/TiO                    2                    nanocomposite-coated polyamide fabric
VL  - 28
IS  - 8
SP  - 795
EP  - 808
DO  - 10.1080/09276440.2020.1805219
ER  - 

@article{
author = "Radoičić, Marija and Ćirić-Marjanović, Gordana and Miličević, Dejan and Suljovrujić, Edin and Milošević, Milica and Kuljanin Jakovljević, Jadranka and Šaponjić, Zoran",
year = "2021",
abstract = "Structural, conductive and dielectric properties of hybrid Polypyrrole (PPy)-TiO2 nanocomposite-coated polyamide fabric (PA-PPy/TiO2) synthesized by in-situ oxidative polymerization of pyrrole on the surface of polyamide in the presence of colloidal TiO2 NPs (d ~ 4.5 nm) have been studied. Raman spectra confirmed salt form of PPy in both neat PPy and PPy/TiO2-coated PA fabric and indicated its complete coverage. SEM/EDX analysis confirmed presence of TiO2 NPs and changes in granular structure of PPy deposited on the surface of PA fiber depending on the amount of TiO2 NPs. The PA-PPy/TiO2 nanocomposite sample with lowest content of TiO2 NPs (6.79 At.% Ti) showed highest conductivity (~10−6 S/cm) and dissipation factor (tan δ) in the entire frequency range. The lowest amount of TiO2 NPs in the PA-PPy/TiO2 nanocomposite induced two to four orders of magnitude higher tan δ value, compared to neat PPy covered PA fabric, depending on the frequency range. Frequency dependence of real (ϵ′) and imaginary part (ϵ″) of the complex permittivity for neat PA and PPy/TiO2-coated PA fabrics follow the trend of changes in dissipation factor for the same TiO2 NPs concentrations. The presence of TiO2 NPs could be exploited for tuning the conductive and dielectric properties of a conductive layer.",
journal = "Composite Interfaces",
title = "Fine-tuning of conductive and dielectric properties of polypyrrole/TiO                    2                    nanocomposite-coated polyamide fabric",
volume = "28",
number = "8",
pages = "795-808",
doi = "10.1080/09276440.2020.1805219"
}

Radoičić, M., Ćirić-Marjanović, G., Miličević, D., Suljovrujić, E., Milošević, M., Kuljanin Jakovljević, J.,& Šaponjić, Z.. (2021). Fine-tuning of conductive and dielectric properties of polypyrrole/TiO                    2                    nanocomposite-coated polyamide fabric. in Composite Interfaces, 28(8), 795-808.
https://doi.org/10.1080/09276440.2020.1805219

Radoičić M, Ćirić-Marjanović G, Miličević D, Suljovrujić E, Milošević M, Kuljanin Jakovljević J, Šaponjić Z. Fine-tuning of conductive and dielectric properties of polypyrrole/TiO                    2                    nanocomposite-coated polyamide fabric. in Composite Interfaces. 2021;28(8):795-808.
doi:10.1080/09276440.2020.1805219 .

Radoičić, Marija, Ćirić-Marjanović, Gordana, Miličević, Dejan, Suljovrujić, Edin, Milošević, Milica, Kuljanin Jakovljević, Jadranka, Šaponjić, Zoran, "Fine-tuning of conductive and dielectric properties of polypyrrole/TiO                    2                    nanocomposite-coated polyamide fabric" in Composite Interfaces, 28, no. 8 (2021):795-808,
https://doi.org/10.1080/09276440.2020.1805219 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Stojanović, Zoran S.
AU  - Dudić, Duško
AU  - Miličević, Dejan S.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9623
AB  - Orientation and radiation processing of polymeric materials are the main steps in certain modern technologies and have extensive applications. The properties of such treated polymers can change significantly in time and under various exploitation conditions and therefore, investigation of some specific effects of aging and storage of these systems is of great importance, although the overall degradation behavior of iPP is well known. In this work, isotactic polypropylene (iPP) samples were oriented via solid-state stretching at elevated temperature (at 100°C, up to draw ratio λ=20). This was followed by gamma irradiation in the air (up to 700 kGy) and/or thermo-oxidative (TO) aging (in oxygen, at 100°C, up to 8 days) and/or storage (at room temperature, up to 3 years). As the iPP is very sensitive to orientation and degradation, microstructures were analyzed by optical (OM) and scanning electron microscopy (SEM). Wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) were used to monitor changes in structure and recrystallization. Considering the fact that at higher irradiation doses (>200 kGy), iPP starts to gel under the ambient conditions, gel measurements were employed to determine the yield of network formation induced by irradiation of stretched structures. Irradiation, TO degradation and storage, can induce substantial alternations of (di)electric properties which can be properly connected to the changes in microstructure and crystallinity; therefore, dielectric loss analysis was performed in a wide temperature range and polar groups that were introduced in apolar iPP by oxidation were considered as tracer groups. © 2021 Elsevier Ltd
T2  - Polymer Degradation and Stability
T1  - Radiation, thermo-oxidative and storage induced changes in microstructure, crystallinity and dielectric properties of (un)oriented isotactic polypropylene
VL  - 188
SP  - 109564
DO  - 10.1016/j.polymdegradstab.2021.109564
ER  - 

@article{
author = "Suljovrujić, Edin H. and Stojanović, Zoran S. and Dudić, Duško and Miličević, Dejan S.",
year = "2021",
abstract = "Orientation and radiation processing of polymeric materials are the main steps in certain modern technologies and have extensive applications. The properties of such treated polymers can change significantly in time and under various exploitation conditions and therefore, investigation of some specific effects of aging and storage of these systems is of great importance, although the overall degradation behavior of iPP is well known. In this work, isotactic polypropylene (iPP) samples were oriented via solid-state stretching at elevated temperature (at 100°C, up to draw ratio λ=20). This was followed by gamma irradiation in the air (up to 700 kGy) and/or thermo-oxidative (TO) aging (in oxygen, at 100°C, up to 8 days) and/or storage (at room temperature, up to 3 years). As the iPP is very sensitive to orientation and degradation, microstructures were analyzed by optical (OM) and scanning electron microscopy (SEM). Wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) were used to monitor changes in structure and recrystallization. Considering the fact that at higher irradiation doses (>200 kGy), iPP starts to gel under the ambient conditions, gel measurements were employed to determine the yield of network formation induced by irradiation of stretched structures. Irradiation, TO degradation and storage, can induce substantial alternations of (di)electric properties which can be properly connected to the changes in microstructure and crystallinity; therefore, dielectric loss analysis was performed in a wide temperature range and polar groups that were introduced in apolar iPP by oxidation were considered as tracer groups. © 2021 Elsevier Ltd",
journal = "Polymer Degradation and Stability",
title = "Radiation, thermo-oxidative and storage induced changes in microstructure, crystallinity and dielectric properties of (un)oriented isotactic polypropylene",
volume = "188",
pages = "109564",
doi = "10.1016/j.polymdegradstab.2021.109564"
}

Suljovrujić, E. H., Stojanović, Z. S., Dudić, D.,& Miličević, D. S.. (2021). Radiation, thermo-oxidative and storage induced changes in microstructure, crystallinity and dielectric properties of (un)oriented isotactic polypropylene. in Polymer Degradation and Stability, 188, 109564.
https://doi.org/10.1016/j.polymdegradstab.2021.109564

Suljovrujić EH, Stojanović ZS, Dudić D, Miličević DS. Radiation, thermo-oxidative and storage induced changes in microstructure, crystallinity and dielectric properties of (un)oriented isotactic polypropylene. in Polymer Degradation and Stability. 2021;188:109564.
doi:10.1016/j.polymdegradstab.2021.109564 .

Suljovrujić, Edin H., Stojanović, Zoran S., Dudić, Duško, Miličević, Dejan S., "Radiation, thermo-oxidative and storage induced changes in microstructure, crystallinity and dielectric properties of (un)oriented isotactic polypropylene" in Polymer Degradation and Stability, 188 (2021):109564,
https://doi.org/10.1016/j.polymdegradstab.2021.109564 . .

TY  - CONF
AU  - Miletić, Vesna
AU  - Đorđević, Katarina Lj.
AU  - Markushev, Dragan D.
AU  - Popović, Marica
AU  - Galović, Slobodanka
AU  - Miličević, Dejan
AU  - Nešić, Mioljub
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10964
AB  - Specijalno pripremeljeni PLLA uzorci su prekriveni tankim polimernim slojem akrilne boje, formirajući na taj način neprozirni zaštitni sloj. Uniformnost i debljina nanetog sloja su potvrđeni, a onda su izvršena merenja frekventnog fotoakustičkog (FA) odziva dobijenog dvoslojnog sistema korišćenjem FA ćelije minimalne zapremine u transmisionoj konfiguraciji. Ponovljivost je potvrđena višestrukim merenjima na dva nivoa debljine i za svaku stranu pojedinačno. Prikazani rezultati obrađenih merenja potvrđuju ispravnost odluke da se u teorijskom modelovanju odziva i potonjoj interpretaciji koristi dvoslojni generalizovani model FA odziva. Predložene su dalje metode obrade dobijenih podataka, sa ciljem kvantitativne karakterizacije ispitivanog polimernom materijala pomoću procedura zasnovanih na veštačkoj inteligenciji (neuronskim mrežama).
PB  - Istočno Sarajevo : Elektrotehnički fakultet
C3  - InfoTeh-Jahorina : 19. međunarodni simpozijum INFOTEH-JAHORINA 2022 : zbornik radova; Mart 18-20; Jahorina
T1  - Fotoakustička karakterizacija PLLA uzoraka različitih nivoa kristaliničnosti
T1  - Photoacoustic characterization of plla samples at different crystallinity levels
SP  - 109
EP  - 113
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10964
ER  - 

@conference{
author = "Miletić, Vesna and Đorđević, Katarina Lj. and Markushev, Dragan D. and Popović, Marica and Galović, Slobodanka and Miličević, Dejan and Nešić, Mioljub",
year = "2020",
abstract = "Specijalno pripremeljeni PLLA uzorci su prekriveni tankim polimernim slojem akrilne boje, formirajući na taj način neprozirni zaštitni sloj. Uniformnost i debljina nanetog sloja su potvrđeni, a onda su izvršena merenja frekventnog fotoakustičkog (FA) odziva dobijenog dvoslojnog sistema korišćenjem FA ćelije minimalne zapremine u transmisionoj konfiguraciji. Ponovljivost je potvrđena višestrukim merenjima na dva nivoa debljine i za svaku stranu pojedinačno. Prikazani rezultati obrađenih merenja potvrđuju ispravnost odluke da se u teorijskom modelovanju odziva i potonjoj interpretaciji koristi dvoslojni generalizovani model FA odziva. Predložene su dalje metode obrade dobijenih podataka, sa ciljem kvantitativne karakterizacije ispitivanog polimernom materijala pomoću procedura zasnovanih na veštačkoj inteligenciji (neuronskim mrežama).",
publisher = "Istočno Sarajevo : Elektrotehnički fakultet",
journal = "InfoTeh-Jahorina : 19. međunarodni simpozijum INFOTEH-JAHORINA 2022 : zbornik radova; Mart 18-20; Jahorina",
title = "Fotoakustička karakterizacija PLLA uzoraka različitih nivoa kristaliničnosti, Photoacoustic characterization of plla samples at different crystallinity levels",
pages = "109-113",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10964"
}

Miletić, V., Đorđević, K. Lj., Markushev, D. D., Popović, M., Galović, S., Miličević, D.,& Nešić, M.. (2020). Fotoakustička karakterizacija PLLA uzoraka različitih nivoa kristaliničnosti. in InfoTeh-Jahorina : 19. međunarodni simpozijum INFOTEH-JAHORINA 2022 : zbornik radova; Mart 18-20; Jahorina
Istočno Sarajevo : Elektrotehnički fakultet., 109-113.
https://hdl.handle.net/21.15107/rcub_vinar_10964

Miletić V, Đorđević KL, Markushev DD, Popović M, Galović S, Miličević D, Nešić M. Fotoakustička karakterizacija PLLA uzoraka različitih nivoa kristaliničnosti. in InfoTeh-Jahorina : 19. međunarodni simpozijum INFOTEH-JAHORINA 2022 : zbornik radova; Mart 18-20; Jahorina. 2020;:109-113.
https://hdl.handle.net/21.15107/rcub_vinar_10964 .

Miletić, Vesna, Đorđević, Katarina Lj., Markushev, Dragan D., Popović, Marica, Galović, Slobodanka, Miličević, Dejan, Nešić, Mioljub, "Fotoakustička karakterizacija PLLA uzoraka različitih nivoa kristaliničnosti" in InfoTeh-Jahorina : 19. međunarodni simpozijum INFOTEH-JAHORINA 2022 : zbornik radova; Mart 18-20; Jahorina (2020):109-113,
https://hdl.handle.net/21.15107/rcub_vinar_10964 .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Suljovrujić, Edin H.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8562
AB  - In order to investigate the resistance of poly-(l-lactide) (PLLA) to high-energy radiation, two varieties of samples with substantial differences in microstructure and crystallinity are prepared and exposed to the gamma radiation to various absorbed doses (up to 300 kGy). Since the PLLA morphology is sensitive to preparation conditions and radiation, surface microstructures are analyzed by scanning electronic microscopy. The chain scission degradation is followed using a gel permeation chromatography, while the additional characterization is conducted by differential scanning calorimetry, wide-angle X-ray diffraction method and IR spectroscopy. Presented results show that the quenched samples are more susceptible to radiation than initially high crystalline ones. Furthermore, the radiation leads to two considerably dissimilar recrystallization dynamics, connected with initial structural differences and the presence/absence of taut-tie chains. Radiation-induced increase in the crystallinity (more than 25% of initial value) for the quenched samples is noticeable at low radiation doses. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - Polymer Bulletin
T1  - The resistance of poly-(l-lactide) to gamma radiation: effect of initial preparation and crystallinity
VL  - 77
IS  - 5
SP  - 2659
EP  - 2677
DO  - 10.1007/s00289-019-02880-2
ER  - 

@article{
author = "Miličević, Dejan S. and Suljovrujić, Edin H.",
year = "2020",
abstract = "In order to investigate the resistance of poly-(l-lactide) (PLLA) to high-energy radiation, two varieties of samples with substantial differences in microstructure and crystallinity are prepared and exposed to the gamma radiation to various absorbed doses (up to 300 kGy). Since the PLLA morphology is sensitive to preparation conditions and radiation, surface microstructures are analyzed by scanning electronic microscopy. The chain scission degradation is followed using a gel permeation chromatography, while the additional characterization is conducted by differential scanning calorimetry, wide-angle X-ray diffraction method and IR spectroscopy. Presented results show that the quenched samples are more susceptible to radiation than initially high crystalline ones. Furthermore, the radiation leads to two considerably dissimilar recrystallization dynamics, connected with initial structural differences and the presence/absence of taut-tie chains. Radiation-induced increase in the crystallinity (more than 25% of initial value) for the quenched samples is noticeable at low radiation doses. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "Polymer Bulletin",
title = "The resistance of poly-(l-lactide) to gamma radiation: effect of initial preparation and crystallinity",
volume = "77",
number = "5",
pages = "2659-2677",
doi = "10.1007/s00289-019-02880-2"
}

Miličević, D. S.,& Suljovrujić, E. H.. (2020). The resistance of poly-(l-lactide) to gamma radiation: effect of initial preparation and crystallinity. in Polymer Bulletin, 77(5), 2659-2677.
https://doi.org/10.1007/s00289-019-02880-2

Miličević DS, Suljovrujić EH. The resistance of poly-(l-lactide) to gamma radiation: effect of initial preparation and crystallinity. in Polymer Bulletin. 2020;77(5):2659-2677.
doi:10.1007/s00289-019-02880-2 .

Miličević, Dejan S., Suljovrujić, Edin H., "The resistance of poly-(l-lactide) to gamma radiation: effect of initial preparation and crystallinity" in Polymer Bulletin, 77, no. 5 (2020):2659-2677,
https://doi.org/10.1007/s00289-019-02880-2 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Rogić Miladinović, Zorana
AU  - Mićić, Maja M.
AU  - Suljovrujić, Denis
AU  - Miličević, Dejan S.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8048
AB  - The oligo(ethylene glycol) dimethacrylate (OEGDMA), one of the most commonly utilized crosslinking monomers, was used to tailor thermoresponsive POEGDMA hydrogels by varying the monomer/solvent feed ratio (from 10 to 100 wt% of monomer). For the first time, synthesis of different POEGDMA homopolymeric networks was performed by gamma radiation, and due to the expected thermoresponsiveness their temperature-dependent properties were extensively analysed. The sol-gel study was performed as the first step after radiation-induced synthesis. The swelling properties were investigated over the wide pH (2.2–9.0) and temperature (5–80 °C) range. Characterization of structure and properties was additionally conducted by SEM, DSC, FTIR, and UV–Vis spectroscopy. The results indicated that all POEGDMA hydrogels showed a high gel content, inverse thermoresponse and volume phase transition temperature (VPTT) with no respect to initial preparation. On the other hand, by altering the monomer/solvent ratio in the prepolymerisation mixture a large diversity in the microstructure, swelling capacity and VPTT was obtained. © 2019 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT
VL  - 158
SP  - 37
EP  - 45
DO  - 10.1016/j.radphyschem.2018.12.034
ER  - 

@article{
author = "Suljovrujić, Edin H. and Rogić Miladinović, Zorana and Mićić, Maja M. and Suljovrujić, Denis and Miličević, Dejan S.",
year = "2019",
abstract = "The oligo(ethylene glycol) dimethacrylate (OEGDMA), one of the most commonly utilized crosslinking monomers, was used to tailor thermoresponsive POEGDMA hydrogels by varying the monomer/solvent feed ratio (from 10 to 100 wt% of monomer). For the first time, synthesis of different POEGDMA homopolymeric networks was performed by gamma radiation, and due to the expected thermoresponsiveness their temperature-dependent properties were extensively analysed. The sol-gel study was performed as the first step after radiation-induced synthesis. The swelling properties were investigated over the wide pH (2.2–9.0) and temperature (5–80 °C) range. Characterization of structure and properties was additionally conducted by SEM, DSC, FTIR, and UV–Vis spectroscopy. The results indicated that all POEGDMA hydrogels showed a high gel content, inverse thermoresponse and volume phase transition temperature (VPTT) with no respect to initial preparation. On the other hand, by altering the monomer/solvent ratio in the prepolymerisation mixture a large diversity in the microstructure, swelling capacity and VPTT was obtained. © 2019 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT",
volume = "158",
pages = "37-45",
doi = "10.1016/j.radphyschem.2018.12.034"
}

Suljovrujić, E. H., Rogić Miladinović, Z., Mićić, M. M., Suljovrujić, D.,& Miličević, D. S.. (2019). The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT. in Radiation Physics and Chemistry, 158, 37-45.
https://doi.org/10.1016/j.radphyschem.2018.12.034

Suljovrujić EH, Rogić Miladinović Z, Mićić MM, Suljovrujić D, Miličević DS. The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT. in Radiation Physics and Chemistry. 2019;158:37-45.
doi:10.1016/j.radphyschem.2018.12.034 .

Suljovrujić, Edin H., Rogić Miladinović, Zorana, Mićić, Maja M., Suljovrujić, Denis, Miličević, Dejan S., "The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT" in Radiation Physics and Chemistry, 158 (2019):37-45,
https://doi.org/10.1016/j.radphyschem.2018.12.034 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Rogić Miladinović, Zorana
AU  - Mićić, Maja M.
AU  - Suljovrujić, Denis
AU  - Miličević, Dejan S.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8051
AB  - The oligo(ethylene glycol) dimethacrylate (OEGDMA), one of the most commonly utilized crosslinking monomers, was used to tailor thermoresponsive POEGDMA hydrogels by varying the monomer/solvent feed ratio (from 10 to 100 wt% of monomer). For the first time, synthesis of different POEGDMA homopolymeric networks was performed by gamma radiation, and due to the expected thermoresponsiveness their temperature-dependent properties were extensively analysed. The sol-gel study was performed as the first step after radiation-induced synthesis. The swelling properties were investigated over the wide pH (2.2–9.0) and temperature (5–80 °C) range. Characterization of structure and properties was additionally conducted by SEM, DSC, FTIR, and UV–Vis spectroscopy. The results indicated that all POEGDMA hydrogels showed a high gel content, inverse thermoresponse and volume phase transition temperature (VPTT) with no respect to initial preparation. On the other hand, by altering the monomer/solvent ratio in the prepolymerisation mixture a large diversity in the microstructure, swelling capacity and VPTT was obtained. © 2019 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT
VL  - 158
SP  - 37
EP  - 45
DO  - 10.1016/j.radphyschem.2018.12.034
ER  - 

@article{
author = "Suljovrujić, Edin H. and Rogić Miladinović, Zorana and Mićić, Maja M. and Suljovrujić, Denis and Miličević, Dejan S.",
year = "2019",
abstract = "The oligo(ethylene glycol) dimethacrylate (OEGDMA), one of the most commonly utilized crosslinking monomers, was used to tailor thermoresponsive POEGDMA hydrogels by varying the monomer/solvent feed ratio (from 10 to 100 wt% of monomer). For the first time, synthesis of different POEGDMA homopolymeric networks was performed by gamma radiation, and due to the expected thermoresponsiveness their temperature-dependent properties were extensively analysed. The sol-gel study was performed as the first step after radiation-induced synthesis. The swelling properties were investigated over the wide pH (2.2–9.0) and temperature (5–80 °C) range. Characterization of structure and properties was additionally conducted by SEM, DSC, FTIR, and UV–Vis spectroscopy. The results indicated that all POEGDMA hydrogels showed a high gel content, inverse thermoresponse and volume phase transition temperature (VPTT) with no respect to initial preparation. On the other hand, by altering the monomer/solvent ratio in the prepolymerisation mixture a large diversity in the microstructure, swelling capacity and VPTT was obtained. © 2019 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT",
volume = "158",
pages = "37-45",
doi = "10.1016/j.radphyschem.2018.12.034"
}

Suljovrujić, E. H., Rogić Miladinović, Z., Mićić, M. M., Suljovrujić, D.,& Miličević, D. S.. (2019). The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT. in Radiation Physics and Chemistry, 158, 37-45.
https://doi.org/10.1016/j.radphyschem.2018.12.034

Suljovrujić EH, Rogić Miladinović Z, Mićić MM, Suljovrujić D, Miličević DS. The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT. in Radiation Physics and Chemistry. 2019;158:37-45.
doi:10.1016/j.radphyschem.2018.12.034 .

Suljovrujić, Edin H., Rogić Miladinović, Zorana, Mićić, Maja M., Suljovrujić, Denis, Miličević, Dejan S., "The influence of monomer/solvent feed ratio on POEGDMA thermoresponsive hydrogels: Radiation-induced synthesis, swelling properties and VPTT" in Radiation Physics and Chemistry, 158 (2019):37-45,
https://doi.org/10.1016/j.radphyschem.2018.12.034 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Miličević, Dejan S.
PY  - 2019
UR  - https://www.tandfonline.com/doi/full/10.1080/1023666X.2019.1598635
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8134
AB  - Poly(l-lactide) (PLLA) is an extensively employed biodegradable semicrystalline polymer with usage from implantable medical devices and drug release matrices to environmentally friendly packaging materials. Since the morphology and crystallinity considerably determine the application field, PLLA samples with a large variation in crystallinity (going from below 20% to over 70%) were prepared by different procedures. Subsequent differences in morphology, crystallinity and thermal properties were followed by scanning electron microscopy (SEM), wide angle X-ray diffraction (WAXD) measurements and differential scanning calorimetry (DSC). The value of the enthalpy of melting of a perfectly (100%) crystalline PLLA was determined (ΔH f = 115.7 J/g). © 2019, © 2019 Taylor & Francis Group, LLC.
T2  - International Journal of Polymer Analysis and Characterization
T1  - On the enthalpy of melting of poly(l-lactide)
VL  - 24
IS  - 5
SP  - 381
EP  - 388
DO  - 10.1080/1023666X.2019.1598635
ER  - 

@article{
author = "Suljovrujić, Edin H. and Miličević, Dejan S.",
year = "2019",
abstract = "Poly(l-lactide) (PLLA) is an extensively employed biodegradable semicrystalline polymer with usage from implantable medical devices and drug release matrices to environmentally friendly packaging materials. Since the morphology and crystallinity considerably determine the application field, PLLA samples with a large variation in crystallinity (going from below 20% to over 70%) were prepared by different procedures. Subsequent differences in morphology, crystallinity and thermal properties were followed by scanning electron microscopy (SEM), wide angle X-ray diffraction (WAXD) measurements and differential scanning calorimetry (DSC). The value of the enthalpy of melting of a perfectly (100%) crystalline PLLA was determined (ΔH f = 115.7 J/g). © 2019, © 2019 Taylor & Francis Group, LLC.",
journal = "International Journal of Polymer Analysis and Characterization",
title = "On the enthalpy of melting of poly(l-lactide)",
volume = "24",
number = "5",
pages = "381-388",
doi = "10.1080/1023666X.2019.1598635"
}

Suljovrujić, E. H.,& Miličević, D. S.. (2019). On the enthalpy of melting of poly(l-lactide). in International Journal of Polymer Analysis and Characterization, 24(5), 381-388.
https://doi.org/10.1080/1023666X.2019.1598635

Suljovrujić EH, Miličević DS. On the enthalpy of melting of poly(l-lactide). in International Journal of Polymer Analysis and Characterization. 2019;24(5):381-388.
doi:10.1080/1023666X.2019.1598635 .

Suljovrujić, Edin H., Miličević, Dejan S., "On the enthalpy of melting of poly(l-lactide)" in International Journal of Polymer Analysis and Characterization, 24, no. 5 (2019):381-388,
https://doi.org/10.1080/1023666X.2019.1598635 . .

TY  - JOUR
AU  - Nešić, Mioljub V.
AU  - Popović, Milan
AU  - Rabasović, Mihailo D.
AU  - Miličević, Dejan S.
AU  - Suljovrujić, Edin H.
AU  - Markushev, Dragan D.
AU  - Stojanović, Zoran A.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7199
AB  - In this work, thermal diffusivity of crystalline high-density polyethylene samples of various thickness, and prepared using different procedures, was evaluated by transmission gas-microphone frequency photoacoustics. The samples composition analysis and their degree of crystallinity were determined from the wide-angle X-ray diffraction, which confirmed that high-density polyethylene samples, obtained by slow and fast cooling, were equivalent in composition but with different degrees of crystallinity. Structural analysis, performed by differential scanning calorimetry, demonstrated that all of the used samples had different levels of crystallinity, depending not only on the preparing procedure, but also on sample thickness. Therefore, in order to evaluate the samples thermal diffusivity, it was necessary to modify standard photoacoustic fitting procedures (based on the normalization of photoacoustic amplitude and phase characteristics on two thickness levels) for the interpretation of photoacoustic measurements. The calculated values of thermal diffusivity were in the range of the expected literature values. Besides that, the obtained results indicate the unexpected correlation between the values of thermal diffusivity and thermal conductivity with the degree of crystallinity of the investigated geometrically thin samples. The results indicate the necessity of additional investigation of energy transport in macromolecular systems, as well as the possible employment of the photoacoustic techniques in order to clarify its mechanism.
T2  - International Journal of Thermophysics
T1  - Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics
VL  - 39
IS  - 2
DO  - 10.1007/s10765-017-2345-0
ER  - 

@article{
author = "Nešić, Mioljub V. and Popović, Milan and Rabasović, Mihailo D. and Miličević, Dejan S. and Suljovrujić, Edin H. and Markushev, Dragan D. and Stojanović, Zoran A.",
year = "2018",
abstract = "In this work, thermal diffusivity of crystalline high-density polyethylene samples of various thickness, and prepared using different procedures, was evaluated by transmission gas-microphone frequency photoacoustics. The samples composition analysis and their degree of crystallinity were determined from the wide-angle X-ray diffraction, which confirmed that high-density polyethylene samples, obtained by slow and fast cooling, were equivalent in composition but with different degrees of crystallinity. Structural analysis, performed by differential scanning calorimetry, demonstrated that all of the used samples had different levels of crystallinity, depending not only on the preparing procedure, but also on sample thickness. Therefore, in order to evaluate the samples thermal diffusivity, it was necessary to modify standard photoacoustic fitting procedures (based on the normalization of photoacoustic amplitude and phase characteristics on two thickness levels) for the interpretation of photoacoustic measurements. The calculated values of thermal diffusivity were in the range of the expected literature values. Besides that, the obtained results indicate the unexpected correlation between the values of thermal diffusivity and thermal conductivity with the degree of crystallinity of the investigated geometrically thin samples. The results indicate the necessity of additional investigation of energy transport in macromolecular systems, as well as the possible employment of the photoacoustic techniques in order to clarify its mechanism.",
journal = "International Journal of Thermophysics",
title = "Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics",
volume = "39",
number = "2",
doi = "10.1007/s10765-017-2345-0"
}

Nešić, M. V., Popović, M., Rabasović, M. D., Miličević, D. S., Suljovrujić, E. H., Markushev, D. D.,& Stojanović, Z. A.. (2018). Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics. in International Journal of Thermophysics, 39(2).
https://doi.org/10.1007/s10765-017-2345-0

Nešić MV, Popović M, Rabasović MD, Miličević DS, Suljovrujić EH, Markushev DD, Stojanović ZA. Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics. in International Journal of Thermophysics. 2018;39(2).
doi:10.1007/s10765-017-2345-0 .

Nešić, Mioljub V., Popović, Milan, Rabasović, Mihailo D., Miličević, Dejan S., Suljovrujić, Edin H., Markushev, Dragan D., Stojanović, Zoran A., "Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics" in International Journal of Thermophysics, 39, no. 2 (2018),
https://doi.org/10.1007/s10765-017-2345-0 . .

TY  - CONF
AU  - Suljovrujić, Edin
AU  - Mićić, Maja M.
AU  - Rogić Miladinović, Zorana
AU  - Miličević, Dejan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11470
AB  - New hydrogels based on different oligo(alkylene glycol) methacrylate (OAGMA) with inverse thermo-response and volume phase transition temperature (VPTT) close to human body temperature were investigated in this work. Synthesis was performed from monomer-solvent mixture by gamma radiation; four different OAGMA (EG6MA, EG6PG3MA, EG3PG6MA and PG5MA) were used. The main focus was made on hydrogels based on EGxPGy pendant chains with different number of ethylene glycol and propylene glycol units in “block” backbone since in the case of POPGMA and POEGMA homopolimers (e.g. hydrogels with pure PG and EG pedant chains) the VPTTs were observed far below and far above the human body temperature, respectively. Characterisation of the hydrogels was performed by swelling, UV-Vis, FTIR, SEM, DSC and in vitro biocompatibility investigations. Due to the possibility to combined VPTT close to human body temperature with good biocompatibility, new hydrogels based on EGPG “block” pedant chains show great potential for biomedical applications.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
T1  - Temperature responsive hydrogels based on ethylene glycol propylene glycol "block" units with VPTT close to human body temperature
SP  - 71
EP  - 71
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11470
ER  - 

@conference{
author = "Suljovrujić, Edin and Mićić, Maja M. and Rogić Miladinović, Zorana and Miličević, Dejan",
year = "2017",
abstract = "New hydrogels based on different oligo(alkylene glycol) methacrylate (OAGMA) with inverse thermo-response and volume phase transition temperature (VPTT) close to human body temperature were investigated in this work. Synthesis was performed from monomer-solvent mixture by gamma radiation; four different OAGMA (EG6MA, EG6PG3MA, EG3PG6MA and PG5MA) were used. The main focus was made on hydrogels based on EGxPGy pendant chains with different number of ethylene glycol and propylene glycol units in “block” backbone since in the case of POPGMA and POEGMA homopolimers (e.g. hydrogels with pure PG and EG pedant chains) the VPTTs were observed far below and far above the human body temperature, respectively. Characterisation of the hydrogels was performed by swelling, UV-Vis, FTIR, SEM, DSC and in vitro biocompatibility investigations. Due to the possibility to combined VPTT close to human body temperature with good biocompatibility, new hydrogels based on EGPG “block” pedant chains show great potential for biomedical applications.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017",
title = "Temperature responsive hydrogels based on ethylene glycol propylene glycol "block" units with VPTT close to human body temperature",
pages = "71-71",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11470"
}

Suljovrujić, E., Mićić, M. M., Rogić Miladinović, Z.,& Miličević, D.. (2017). Temperature responsive hydrogels based on ethylene glycol propylene glycol "block" units with VPTT close to human body temperature. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 71-71.
https://hdl.handle.net/21.15107/rcub_vinar_11470

Suljovrujić E, Mićić MM, Rogić Miladinović Z, Miličević D. Temperature responsive hydrogels based on ethylene glycol propylene glycol "block" units with VPTT close to human body temperature. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:71-71.
https://hdl.handle.net/21.15107/rcub_vinar_11470 .

Suljovrujić, Edin, Mićić, Maja M., Rogić Miladinović, Zorana, Miličević, Dejan, "Temperature responsive hydrogels based on ethylene glycol propylene glycol "block" units with VPTT close to human body temperature" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):71-71,
https://hdl.handle.net/21.15107/rcub_vinar_11470 .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Suljovrujić, Edin H.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1676
AB  - Poly-L-lactide (PLLA) and hydroxyapatite/poly-L-lactide (HAp/PLLA) are two widely used biomaterials for three-dimensional scaffolds, drug release matrices and implantable medical devices for reparation of bone tissue; diversity in the initial preparation and filler content has a significant influence on different properties such as morphology and crystallinity, thus playing a considerable role in most of these applications. For this reason, PLLA and HAp/PLLA samples with a large difference in crystallinity (from below 20% to over 70%) and filler content (up to 86 wt% of HAp nanoparticles with an average diameter of 80 nm) were prepared and consequent dissimilarities in morphology, crystallinity and thermal properties were investigated by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) measurements and Fourier transform infrared (FTIR) spectroscopy. Special attention was devoted to analyzing data obtained from thermal measurements. A three-phase model was employed in order to describe the heat capacity step decline in the nanocomposite; the evolution in different polymer fractions, the crystalline fraction and the mobile and rigid amorphous fractions, with filler content was determined. (c) 2017 Society of Chemical Industry
T2  - Polymer International
T1  - The influence of the preparation conditions and filler content on thermal properties of poly-L-lactide and hydroxyapatite/poly-L-lactide nanocomposite
VL  - 66
IS  - 9
SP  - 1275
EP  - 1283
DO  - 10.1002/pi.5382
ER  - 

@article{
author = "Miličević, Dejan S. and Suljovrujić, Edin H.",
year = "2017",
abstract = "Poly-L-lactide (PLLA) and hydroxyapatite/poly-L-lactide (HAp/PLLA) are two widely used biomaterials for three-dimensional scaffolds, drug release matrices and implantable medical devices for reparation of bone tissue; diversity in the initial preparation and filler content has a significant influence on different properties such as morphology and crystallinity, thus playing a considerable role in most of these applications. For this reason, PLLA and HAp/PLLA samples with a large difference in crystallinity (from below 20% to over 70%) and filler content (up to 86 wt% of HAp nanoparticles with an average diameter of 80 nm) were prepared and consequent dissimilarities in morphology, crystallinity and thermal properties were investigated by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) measurements and Fourier transform infrared (FTIR) spectroscopy. Special attention was devoted to analyzing data obtained from thermal measurements. A three-phase model was employed in order to describe the heat capacity step decline in the nanocomposite; the evolution in different polymer fractions, the crystalline fraction and the mobile and rigid amorphous fractions, with filler content was determined. (c) 2017 Society of Chemical Industry",
journal = "Polymer International",
title = "The influence of the preparation conditions and filler content on thermal properties of poly-L-lactide and hydroxyapatite/poly-L-lactide nanocomposite",
volume = "66",
number = "9",
pages = "1275-1283",
doi = "10.1002/pi.5382"
}

Miličević, D. S.,& Suljovrujić, E. H.. (2017). The influence of the preparation conditions and filler content on thermal properties of poly-L-lactide and hydroxyapatite/poly-L-lactide nanocomposite. in Polymer International, 66(9), 1275-1283.
https://doi.org/10.1002/pi.5382

Miličević DS, Suljovrujić EH. The influence of the preparation conditions and filler content on thermal properties of poly-L-lactide and hydroxyapatite/poly-L-lactide nanocomposite. in Polymer International. 2017;66(9):1275-1283.
doi:10.1002/pi.5382 .

Miličević, Dejan S., Suljovrujić, Edin H., "The influence of the preparation conditions and filler content on thermal properties of poly-L-lactide and hydroxyapatite/poly-L-lactide nanocomposite" in Polymer International, 66, no. 9 (2017):1275-1283,
https://doi.org/10.1002/pi.5382 . .

TY  - CONF
AU  - Suljovrujić, Edin
AU  - Rogić Miladinović, Zorana
AU  - Miličević, Dejan
AU  - Mićić, Maja
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12406
AB  - New hydrogels based on different oligo(alkylene glycol) methacrylate (OAGMA) with inverse thermoresponse and volume phase transition temperature (VPTT) were obtained and characterised. Synthesis was performed from monomer-solvent (OAGMA-water/ethanol) mixture using gamma radiation. Characterisation of the hydrogels was performed by swelling, UV-Vis, FTIR, SEM, DSC and in vitro biocompatibility (cytocompatibility and haemolytic activity) investigations. Due to the possibility to combine VPTT close to human body temperature with good biocompatibility, new homopolymeric hydrogel based on EGPG “block” pendant chains showed promising potential for different biomedical applications.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : Programme and the book of abstracts
T1  - Temperature responsive hydrogels with ethylene glycol propylene glycol pendant chains
SP  - 74
EP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12406
ER  - 

@conference{
author = "Suljovrujić, Edin and Rogić Miladinović, Zorana and Miličević, Dejan and Mićić, Maja",
year = "2016",
abstract = "New hydrogels based on different oligo(alkylene glycol) methacrylate (OAGMA) with inverse thermoresponse and volume phase transition temperature (VPTT) were obtained and characterised. Synthesis was performed from monomer-solvent (OAGMA-water/ethanol) mixture using gamma radiation. Characterisation of the hydrogels was performed by swelling, UV-Vis, FTIR, SEM, DSC and in vitro biocompatibility (cytocompatibility and haemolytic activity) investigations. Due to the possibility to combine VPTT close to human body temperature with good biocompatibility, new homopolymeric hydrogel based on EGPG “block” pendant chains showed promising potential for different biomedical applications.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : Programme and the book of abstracts",
title = "Temperature responsive hydrogels with ethylene glycol propylene glycol pendant chains",
pages = "74-74",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12406"
}

Suljovrujić, E., Rogić Miladinović, Z., Miličević, D.,& Mićić, M.. (2016). Temperature responsive hydrogels with ethylene glycol propylene glycol pendant chains. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : Programme and the book of abstracts
Belgrade : Materials Research Society of Serbia., 74-74.
https://hdl.handle.net/21.15107/rcub_vinar_12406

Suljovrujić E, Rogić Miladinović Z, Miličević D, Mićić M. Temperature responsive hydrogels with ethylene glycol propylene glycol pendant chains. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : Programme and the book of abstracts. 2016;:74-74.
https://hdl.handle.net/21.15107/rcub_vinar_12406 .

Suljovrujić, Edin, Rogić Miladinović, Zorana, Miličević, Dejan, Mićić, Maja, "Temperature responsive hydrogels with ethylene glycol propylene glycol pendant chains" in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : Programme and the book of abstracts (2016):74-74,
https://hdl.handle.net/21.15107/rcub_vinar_12406 .

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna V.
AU  - Grgur, Branimir N.
AU  - Gvozdenovic, Milica M.
AU  - Jugović, Branimir Z.
AU  - Miličević, Dejan S.
AU  - Džunuzović, Enis S.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1223
AB  - Novel TiO2-PANI core-shell nanocomposite, prepared by in situ oxidative polymerization of aniline in the presence of TiO2 nanoparticles surface modified with vitamin B6, was used to reinforce epoxy resin. The size of prepared TiO2 nanoparticles and TiO2-PANI nanocomposite were determined by a transmission electron microscopy (TEM). The surface modification of TiO2 nanoparticles was confirmed by FTIR and UV-vis spectroscopy, while the morphology of PANI and TiO2-PANI nanocomposite was investigated by scanning electron microscopy (SEM). The influence of TiO2-PANI nanocomposite on glass transition temperature, dielectric and dynamic mechanical properties, thermooxidative stability, mechanical and anticorrosion properties of epoxy based nanocomposites was investigated and compared to the properties of epoxy/PANI nanocomposites. It has been observed that the glass transition temperature of epoxy resin increases after introduction of PANI and TiO2-PANI nanocomposite, as well as with increasing their content. Prepared nanocomposites exhibited higher value of dielectric constant than pure epoxy resin. Epoxy based coating containing TiO2-PANI nanocomposite showed lower dielectric loss, higher hardness and better anticorrosion properties than pure epoxy resin and epoxy/PANI nanocomposite. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Progress in Organic Coatings
T1  - Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6
VL  - 99
SP  - 346
EP  - 355
DO  - 10.1016/j.porgcoat.2016.06.014
ER  - 

@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna V. and Grgur, Branimir N. and Gvozdenovic, Milica M. and Jugović, Branimir Z. and Miličević, Dejan S. and Džunuzović, Enis S.",
year = "2016",
abstract = "Novel TiO2-PANI core-shell nanocomposite, prepared by in situ oxidative polymerization of aniline in the presence of TiO2 nanoparticles surface modified with vitamin B6, was used to reinforce epoxy resin. The size of prepared TiO2 nanoparticles and TiO2-PANI nanocomposite were determined by a transmission electron microscopy (TEM). The surface modification of TiO2 nanoparticles was confirmed by FTIR and UV-vis spectroscopy, while the morphology of PANI and TiO2-PANI nanocomposite was investigated by scanning electron microscopy (SEM). The influence of TiO2-PANI nanocomposite on glass transition temperature, dielectric and dynamic mechanical properties, thermooxidative stability, mechanical and anticorrosion properties of epoxy based nanocomposites was investigated and compared to the properties of epoxy/PANI nanocomposites. It has been observed that the glass transition temperature of epoxy resin increases after introduction of PANI and TiO2-PANI nanocomposite, as well as with increasing their content. Prepared nanocomposites exhibited higher value of dielectric constant than pure epoxy resin. Epoxy based coating containing TiO2-PANI nanocomposite showed lower dielectric loss, higher hardness and better anticorrosion properties than pure epoxy resin and epoxy/PANI nanocomposite. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Progress in Organic Coatings",
title = "Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6",
volume = "99",
pages = "346-355",
doi = "10.1016/j.porgcoat.2016.06.014"
}

Radoman, T. S., Džunuzović, J. V., Grgur, B. N., Gvozdenovic, M. M., Jugović, B. Z., Miličević, D. S.,& Džunuzović, E. S.. (2016). Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6. in Progress in Organic Coatings, 99, 346-355.
https://doi.org/10.1016/j.porgcoat.2016.06.014

Radoman TS, Džunuzović JV, Grgur BN, Gvozdenovic MM, Jugović BZ, Miličević DS, Džunuzović ES. Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6. in Progress in Organic Coatings. 2016;99:346-355.
doi:10.1016/j.porgcoat.2016.06.014 .

Radoman, Tijana S., Džunuzović, Jasna V., Grgur, Branimir N., Gvozdenovic, Milica M., Jugović, Branimir Z., Miličević, Dejan S., Džunuzović, Enis S., "Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6" in Progress in Organic Coatings, 99 (2016):346-355,
https://doi.org/10.1016/j.porgcoat.2016.06.014 . .

TY  - CONF
AU  - Mićić, Maja
AU  - Rogić Miladinović, Zorana
AU  - Miličević, Dejan
AU  - Suljovrujić, Edin
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12405
AB  - Gamma radiation was used to prepare copolymer libraries based on oligo(propylene glycol) methacrylate (OPGMA) and 2-hydroxyethyl methacrylate (HEMA); a complete screening in composition of P(OPGMA/HEMA) copolymers was elaborated from 0 to 100% of OPGMA. Determination of gel fraction was performed as a first step after radiation induced synthesis. Tuning of the volume phase transition temperature (VPTT) of P(OPGMA/HEMA) copolymeric hydrogels was investigated by swelling study; the swelling properties were preliminary investigated over the wide pH (2.2-9.0) and temperature (4-80°C) ranges. It has been observed that P(OPGMA/HEMA) hydrogels followed a simple rule in their thermoresponsive behaviour showing a linear increase in VPTT with a decreasing wt% of OPGMA in the copolymer composition. Additional characterisation of the structure and properties was conducted by FTIR, DSC and UV-Vis spectroscopy. All results indicate that new P(OPGMA/HEMA) copolymeric hydrogels have wide diversity in thermoresponsive properties which strongly depend on their composition.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Seventeenth Annual Conference YUCOMAT 2015 : Programme and The Book of Abstracts
T1  - The influence of gradient copolymerisation poly(oligo(propylene glycol) methacrylate) hydrogels with 2-hydroxyethyl methacrylate on thermoresponsive properties
SP  - 87
EP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12405
ER  - 

@conference{
author = "Mićić, Maja and Rogić Miladinović, Zorana and Miličević, Dejan and Suljovrujić, Edin",
year = "2015",
abstract = "Gamma radiation was used to prepare copolymer libraries based on oligo(propylene glycol) methacrylate (OPGMA) and 2-hydroxyethyl methacrylate (HEMA); a complete screening in composition of P(OPGMA/HEMA) copolymers was elaborated from 0 to 100% of OPGMA. Determination of gel fraction was performed as a first step after radiation induced synthesis. Tuning of the volume phase transition temperature (VPTT) of P(OPGMA/HEMA) copolymeric hydrogels was investigated by swelling study; the swelling properties were preliminary investigated over the wide pH (2.2-9.0) and temperature (4-80°C) ranges. It has been observed that P(OPGMA/HEMA) hydrogels followed a simple rule in their thermoresponsive behaviour showing a linear increase in VPTT with a decreasing wt% of OPGMA in the copolymer composition. Additional characterisation of the structure and properties was conducted by FTIR, DSC and UV-Vis spectroscopy. All results indicate that new P(OPGMA/HEMA) copolymeric hydrogels have wide diversity in thermoresponsive properties which strongly depend on their composition.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Seventeenth Annual Conference YUCOMAT 2015 : Programme and The Book of Abstracts",
title = "The influence of gradient copolymerisation poly(oligo(propylene glycol) methacrylate) hydrogels with 2-hydroxyethyl methacrylate on thermoresponsive properties",
pages = "87-87",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12405"
}

Mićić, M., Rogić Miladinović, Z., Miličević, D.,& Suljovrujić, E.. (2015). The influence of gradient copolymerisation poly(oligo(propylene glycol) methacrylate) hydrogels with 2-hydroxyethyl methacrylate on thermoresponsive properties. in Seventeenth Annual Conference YUCOMAT 2015 : Programme and The Book of Abstracts
Belgrade : Materials Research Society of Serbia., 87-87.
https://hdl.handle.net/21.15107/rcub_vinar_12405

Mićić M, Rogić Miladinović Z, Miličević D, Suljovrujić E. The influence of gradient copolymerisation poly(oligo(propylene glycol) methacrylate) hydrogels with 2-hydroxyethyl methacrylate on thermoresponsive properties. in Seventeenth Annual Conference YUCOMAT 2015 : Programme and The Book of Abstracts. 2015;:87-87.
https://hdl.handle.net/21.15107/rcub_vinar_12405 .

Mićić, Maja, Rogić Miladinović, Zorana, Miličević, Dejan, Suljovrujić, Edin, "The influence of gradient copolymerisation poly(oligo(propylene glycol) methacrylate) hydrogels with 2-hydroxyethyl methacrylate on thermoresponsive properties" in Seventeenth Annual Conference YUCOMAT 2015 : Programme and The Book of Abstracts (2015):87-87,
https://hdl.handle.net/21.15107/rcub_vinar_12405 .

TY  - JOUR
AU  - Stamboliev, Georgi
AU  - Miličević, Dejan S.
AU  - Mićić, Maja M.
AU  - Suljovrujić, Edin H.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/388
AB  - Changes in the structure and dielectric properties of low-density polyethylene were created by gamma irradiation in air, deionised water and nitrogen. Role of irradiation media on dielectric and charge trapping behaviour was studied through dielectric loss and thermally stimulated discharge current measurements. Changes in magnitude, position and activation energy of all dielectric relaxations (gamma, beta and alpha) were found to be dependent on crosslinking and oxidative degradation, two competitive processes which can be tuned by radiation dose and media. Largest changes in the position and activation energy were found for the beta relaxation due to its cooperative nature.
T2  - Polymer Bulletin
T1  - Polyethylene crosslinked in different media: structural changes versus dielectric behaviour
VL  - 72
IS  - 2
SP  - 371
EP  - 385
DO  - 10.1007/s00289-014-1279-y
ER  - 

@article{
author = "Stamboliev, Georgi and Miličević, Dejan S. and Mićić, Maja M. and Suljovrujić, Edin H.",
year = "2015",
abstract = "Changes in the structure and dielectric properties of low-density polyethylene were created by gamma irradiation in air, deionised water and nitrogen. Role of irradiation media on dielectric and charge trapping behaviour was studied through dielectric loss and thermally stimulated discharge current measurements. Changes in magnitude, position and activation energy of all dielectric relaxations (gamma, beta and alpha) were found to be dependent on crosslinking and oxidative degradation, two competitive processes which can be tuned by radiation dose and media. Largest changes in the position and activation energy were found for the beta relaxation due to its cooperative nature.",
journal = "Polymer Bulletin",
title = "Polyethylene crosslinked in different media: structural changes versus dielectric behaviour",
volume = "72",
number = "2",
pages = "371-385",
doi = "10.1007/s00289-014-1279-y"
}

Stamboliev, G., Miličević, D. S., Mićić, M. M.,& Suljovrujić, E. H.. (2015). Polyethylene crosslinked in different media: structural changes versus dielectric behaviour. in Polymer Bulletin, 72(2), 371-385.
https://doi.org/10.1007/s00289-014-1279-y

Stamboliev G, Miličević DS, Mićić MM, Suljovrujić EH. Polyethylene crosslinked in different media: structural changes versus dielectric behaviour. in Polymer Bulletin. 2015;72(2):371-385.
doi:10.1007/s00289-014-1279-y .

Stamboliev, Georgi, Miličević, Dejan S., Mićić, Maja M., Suljovrujić, Edin H., "Polyethylene crosslinked in different media: structural changes versus dielectric behaviour" in Polymer Bulletin, 72, no. 2 (2015):371-385,
https://doi.org/10.1007/s00289-014-1279-y . .

TY  - JOUR
AU  - Radoičić, Marija B.
AU  - Milošević, Milica V.
AU  - Miličević, Dejan S.
AU  - Suljovrujić, Edin H.
AU  - Ćirić-Marjanović, Gordana N.
AU  - Radetić, Maja M.
AU  - Šaponjić, Zoran
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/756
AB  - Polyester fibers gained significant share from all other man-made fibers, but despite numerous advantages a characteristic static electricity generation is still seeking innovative solutions. In order to improve electrical properties of poly(ethyleneterephthalate) (PET) fabric, coating consisting of polyaniline/TiO2 (PANI/TiO2) nanocomposite was deposited on its surface. Coating was synthesized in acidic medium by the chemical oxidative polymerization of aniline with ammonium peroxydisulfate CAPS) in the presence of colloidal TiO2 nanoparticles (d similar to 4.5 nm) and PET fabric. The morphology, molecular structure and dielectric properties of PANI/TiO2 nanocomposites were studied by scanning electron microscopy (SEM), Raman and dielectric spectroscopies. SEM analysis revealed the formation of non-uniform PANI coating on the reference PET sample. In contrast, uniform PANI/TiO2 coating on the surface of PET fabric was generated when TiO2 nanoparticles were engaged. The existence of conductive emeraldine salt form of PANI and phenazine units was confirmed by Raman spectroscopy. Formation mechanisms of PANI and PANI/TiO2 coatings on PET fabrics were proposed. The presence of TiO2 nanoparticles significantly affected the dielectric properties (permittivity and loss tangent) and AC conductivity of PANI/TiO2 coated PET fabrics. PET fabrics coated by PANI/TiO2 nanocomposite showed up to two orders of magnitude higher conductivity in the measured frequency region compared to PANI coated PET fabric. (C) 2015 Elsevier B.V. All tights reserved.
T2  - Surface and Coatings Technology
T1  - Influence of TiO2 nanoparticles on formation mechanism of PANI/TiO2 nanocomposite coating on PET fabric and its structural and electrical properties
VL  - 278
SP  - 38
EP  - 47
DO  - 10.1016/j.surfcoat.2015.07.070
ER  - 

@article{
author = "Radoičić, Marija B. and Milošević, Milica V. and Miličević, Dejan S. and Suljovrujić, Edin H. and Ćirić-Marjanović, Gordana N. and Radetić, Maja M. and Šaponjić, Zoran",
year = "2015",
abstract = "Polyester fibers gained significant share from all other man-made fibers, but despite numerous advantages a characteristic static electricity generation is still seeking innovative solutions. In order to improve electrical properties of poly(ethyleneterephthalate) (PET) fabric, coating consisting of polyaniline/TiO2 (PANI/TiO2) nanocomposite was deposited on its surface. Coating was synthesized in acidic medium by the chemical oxidative polymerization of aniline with ammonium peroxydisulfate CAPS) in the presence of colloidal TiO2 nanoparticles (d similar to 4.5 nm) and PET fabric. The morphology, molecular structure and dielectric properties of PANI/TiO2 nanocomposites were studied by scanning electron microscopy (SEM), Raman and dielectric spectroscopies. SEM analysis revealed the formation of non-uniform PANI coating on the reference PET sample. In contrast, uniform PANI/TiO2 coating on the surface of PET fabric was generated when TiO2 nanoparticles were engaged. The existence of conductive emeraldine salt form of PANI and phenazine units was confirmed by Raman spectroscopy. Formation mechanisms of PANI and PANI/TiO2 coatings on PET fabrics were proposed. The presence of TiO2 nanoparticles significantly affected the dielectric properties (permittivity and loss tangent) and AC conductivity of PANI/TiO2 coated PET fabrics. PET fabrics coated by PANI/TiO2 nanocomposite showed up to two orders of magnitude higher conductivity in the measured frequency region compared to PANI coated PET fabric. (C) 2015 Elsevier B.V. All tights reserved.",
journal = "Surface and Coatings Technology",
title = "Influence of TiO2 nanoparticles on formation mechanism of PANI/TiO2 nanocomposite coating on PET fabric and its structural and electrical properties",
volume = "278",
pages = "38-47",
doi = "10.1016/j.surfcoat.2015.07.070"
}

Radoičić, M. B., Milošević, M. V., Miličević, D. S., Suljovrujić, E. H., Ćirić-Marjanović, G. N., Radetić, M. M.,& Šaponjić, Z.. (2015). Influence of TiO2 nanoparticles on formation mechanism of PANI/TiO2 nanocomposite coating on PET fabric and its structural and electrical properties. in Surface and Coatings Technology, 278, 38-47.
https://doi.org/10.1016/j.surfcoat.2015.07.070

Radoičić MB, Milošević MV, Miličević DS, Suljovrujić EH, Ćirić-Marjanović GN, Radetić MM, Šaponjić Z. Influence of TiO2 nanoparticles on formation mechanism of PANI/TiO2 nanocomposite coating on PET fabric and its structural and electrical properties. in Surface and Coatings Technology. 2015;278:38-47.
doi:10.1016/j.surfcoat.2015.07.070 .

Radoičić, Marija B., Milošević, Milica V., Miličević, Dejan S., Suljovrujić, Edin H., Ćirić-Marjanović, Gordana N., Radetić, Maja M., Šaponjić, Zoran, "Influence of TiO2 nanoparticles on formation mechanism of PANI/TiO2 nanocomposite coating on PET fabric and its structural and electrical properties" in Surface and Coatings Technology, 278 (2015):38-47,
https://doi.org/10.1016/j.surfcoat.2015.07.070 . .

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna V.
AU  - Jeremić, Katarina B.
AU  - Grgur, Branimir N.
AU  - Miličević, Dejan S.
AU  - Popović, Ivanka G.
AU  - Džunuzović, Enis S.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6098
AB  - Epoxy resin/titanium dioxide (epoxy/TiO2) nanocomposites were obtained by incorporation of TiO2 nanoparticles surface modified with gallic acid esters in epoxy resin. TiO2 nanoparticles were obtained by acid catalyzed hydrolysis of titanium isopropoxide and their structural characterization was performed by X-ray diffraction and transmission electron microscopy. Three gallic acid esters, having different hydrophobic part, were used for surface modification of the synthesized TiO2 nanoparticles: propyl, hexyl and lauryl gallate. The gallate chemisorption onto surface of TiO2 nanoparticles was confirmed by Fourier transform infrared and ultraviolet-visible spectroscopy, while the amount of surface-bonded gallates was determined using thermogravimetric analysis. The influence of the surface modified TiO2 nanoparticles, as well as the length of hydrophobic part of the gallate used for surface modification of TiO2 nanoparticles, on glass transition temperature, barrier, dielectric and anticorrosive properties of epoxy resin was investigated by differential scanning calorimetry, water vapor transmission test, dielectric spectroscopy, electrochemical impedance spectroscopy and polarization measurements. Incorporation of surface modified TiO2 nanoparticles in epoxy resin caused increase of glass transition temperature and decrease of the water vapor permeability of epoxy resin. The water vapor transmission rate of epoxy/TiO2 nanocomposites was reduced with increasing hydrophobic part chain length of gallate ligand. Dielectric constant of examined nanocomposites was influenced by gallate used for the modification of TiO2 nanoparticles. The nanocomposites have better anticorrosive properties than pure epoxy resin, because the surface modified TiO2 nanoparticles react as oxygen scavengers, which inhibit steel corrosion by cathodic mechanism. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Materials and Design
T1  - Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters
VL  - 62
SP  - 158
EP  - 167
DO  - 10.1016/j.matdes.2014.05.015
ER  - 

@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna V. and Jeremić, Katarina B. and Grgur, Branimir N. and Miličević, Dejan S. and Popović, Ivanka G. and Džunuzović, Enis S.",
year = "2014",
abstract = "Epoxy resin/titanium dioxide (epoxy/TiO2) nanocomposites were obtained by incorporation of TiO2 nanoparticles surface modified with gallic acid esters in epoxy resin. TiO2 nanoparticles were obtained by acid catalyzed hydrolysis of titanium isopropoxide and their structural characterization was performed by X-ray diffraction and transmission electron microscopy. Three gallic acid esters, having different hydrophobic part, were used for surface modification of the synthesized TiO2 nanoparticles: propyl, hexyl and lauryl gallate. The gallate chemisorption onto surface of TiO2 nanoparticles was confirmed by Fourier transform infrared and ultraviolet-visible spectroscopy, while the amount of surface-bonded gallates was determined using thermogravimetric analysis. The influence of the surface modified TiO2 nanoparticles, as well as the length of hydrophobic part of the gallate used for surface modification of TiO2 nanoparticles, on glass transition temperature, barrier, dielectric and anticorrosive properties of epoxy resin was investigated by differential scanning calorimetry, water vapor transmission test, dielectric spectroscopy, electrochemical impedance spectroscopy and polarization measurements. Incorporation of surface modified TiO2 nanoparticles in epoxy resin caused increase of glass transition temperature and decrease of the water vapor permeability of epoxy resin. The water vapor transmission rate of epoxy/TiO2 nanocomposites was reduced with increasing hydrophobic part chain length of gallate ligand. Dielectric constant of examined nanocomposites was influenced by gallate used for the modification of TiO2 nanoparticles. The nanocomposites have better anticorrosive properties than pure epoxy resin, because the surface modified TiO2 nanoparticles react as oxygen scavengers, which inhibit steel corrosion by cathodic mechanism. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Materials and Design",
title = "Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters",
volume = "62",
pages = "158-167",
doi = "10.1016/j.matdes.2014.05.015"
}

Radoman, T. S., Džunuzović, J. V., Jeremić, K. B., Grgur, B. N., Miličević, D. S., Popović, I. G.,& Džunuzović, E. S.. (2014). Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters. in Materials and Design, 62, 158-167.
https://doi.org/10.1016/j.matdes.2014.05.015

Radoman TS, Džunuzović JV, Jeremić KB, Grgur BN, Miličević DS, Popović IG, Džunuzović ES. Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters. in Materials and Design. 2014;62:158-167.
doi:10.1016/j.matdes.2014.05.015 .

Radoman, Tijana S., Džunuzović, Jasna V., Jeremić, Katarina B., Grgur, Branimir N., Miličević, Dejan S., Popović, Ivanka G., Džunuzović, Enis S., "Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters" in Materials and Design, 62 (2014):158-167,
https://doi.org/10.1016/j.matdes.2014.05.015 . .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Mićić, Maja M.
AU  - Suljovrujić, Edin H.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/66
AB  - The molecular relaxation behaviour of polyolefins exposed to high-energy radiation has been investigated by dielectric loss (tan delta) analysis. Therefore, low-density polyethylene, high-density polyethylene (HDPE), and isotactic polypropylene (iPP) were gamma-irradiated in air to various absorbed doses (up to 700 kGy). All relaxation zones (alpha, beta, gamma, and delta in the order of decreasing temperature), between 25 K and melting temperature, were studied. The radiation-induced changes observed in the dielectric relaxation spectra were related to the modifications in the structural and morphological parameters attributed to exposure of the polyolefins to radiation. Wide-angle X-ray diffraction, infrared spectroscopy, and gel measurements were used to determine the radiation-induced changes in the crystalline structure, oxidative degradation, and the degree of network formation, respectively. The present study reveals high dielectric and/or relaxation sensitivity of polyolefins to gamma radiation. Disappearance of some relaxations (such as beta relaxation in HDPE and low temperature gamma and delta relaxations in iPP) is clearly observed with irradiation. For the other relaxations, besides the large changes in the relaxation intensity, radiation also induces smaller/larger changes in the distribution of relaxation times, peak position, and activation energy.
T2  - Polymer Bulletin
T1  - Radiation-induced modification of dielectric relaxation spectra of polyolefins: polyethylenes vs. polypropylene
VL  - 71
IS  - 9
SP  - 2317
EP  - 2334
DO  - 10.1007/s00289-014-1190-6
ER  - 

@article{
author = "Miličević, Dejan S. and Mićić, Maja M. and Suljovrujić, Edin H.",
year = "2014",
abstract = "The molecular relaxation behaviour of polyolefins exposed to high-energy radiation has been investigated by dielectric loss (tan delta) analysis. Therefore, low-density polyethylene, high-density polyethylene (HDPE), and isotactic polypropylene (iPP) were gamma-irradiated in air to various absorbed doses (up to 700 kGy). All relaxation zones (alpha, beta, gamma, and delta in the order of decreasing temperature), between 25 K and melting temperature, were studied. The radiation-induced changes observed in the dielectric relaxation spectra were related to the modifications in the structural and morphological parameters attributed to exposure of the polyolefins to radiation. Wide-angle X-ray diffraction, infrared spectroscopy, and gel measurements were used to determine the radiation-induced changes in the crystalline structure, oxidative degradation, and the degree of network formation, respectively. The present study reveals high dielectric and/or relaxation sensitivity of polyolefins to gamma radiation. Disappearance of some relaxations (such as beta relaxation in HDPE and low temperature gamma and delta relaxations in iPP) is clearly observed with irradiation. For the other relaxations, besides the large changes in the relaxation intensity, radiation also induces smaller/larger changes in the distribution of relaxation times, peak position, and activation energy.",
journal = "Polymer Bulletin",
title = "Radiation-induced modification of dielectric relaxation spectra of polyolefins: polyethylenes vs. polypropylene",
volume = "71",
number = "9",
pages = "2317-2334",
doi = "10.1007/s00289-014-1190-6"
}

Miličević, D. S., Mićić, M. M.,& Suljovrujić, E. H.. (2014). Radiation-induced modification of dielectric relaxation spectra of polyolefins: polyethylenes vs. polypropylene. in Polymer Bulletin, 71(9), 2317-2334.
https://doi.org/10.1007/s00289-014-1190-6

Miličević DS, Mićić MM, Suljovrujić EH. Radiation-induced modification of dielectric relaxation spectra of polyolefins: polyethylenes vs. polypropylene. in Polymer Bulletin. 2014;71(9):2317-2334.
doi:10.1007/s00289-014-1190-6 .

Miličević, Dejan S., Mićić, Maja M., Suljovrujić, Edin H., "Radiation-induced modification of dielectric relaxation spectra of polyolefins: polyethylenes vs. polypropylene" in Polymer Bulletin, 71, no. 9 (2014):2317-2334,
https://doi.org/10.1007/s00289-014-1190-6 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Mićić, Maja M.
AU  - Miličević, Dejan S.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5686
AB  - The molecular relaxation behavior of an ice-quenched high density polyethylene (HDPE) subjected to solid-state stretching at elevated temperature (100 degrees C) to various draw ratios (up to lambda=13.7) was examined by means of dielectric spectroscopy. All relaxation zones (alpha, beta and gamma, in order of decreasing temperature) between 25 K and melting temperature were studied in the frequency range from 1 kHz to 1 MHz. The changes observed in different dielectric relaxations were related to the orientation-induced modifications of the structural and morphological parameters. In order to investigate orientation-induced structural changes, optical microscopy (OM), scanning electron microscopy (SEM), wide angle X-ray scattering (WAXS), and differential scanning calorimetry (DSC) were employed. Hermans orientation function (f(c)) was used to quantify the degree of crystal orientation. Complete disappearance of the already weak beta relaxation with orientation is attributed to the increase in crystallinity, but the contribution due to a more restricted chain segment mobility in the interlamellar regions of oriented specimens should also be taken into account. Presented results also reveal two different orientation-induced dynamics in the evolution of the dielectric alpha and gamma relaxations connected with the main transformation stages in the drawing of crystalline polymers. The transformation of the initial isotropic into a fully oriented fibrillar structure introduces large changes in the dielectric relaxation spectra of HDPE, especially in the alpha relaxation zone; by contrast, with further increase in the draw ratio much smaller changes are observed due to the deformation of the fiber structure by longitudinal sliding motions of microfibrils and/or by fibrils slipping past each other.
T2  - Journal of Engineered Fibers and Fabrics
T1  - Uniaxially Oriented High Density Polyethylene
VL  - 8
IS  - 3
SP  - 131
EP  - 143
UR  - https://hdl.handle.net/21.15107/rcub_vinar_5686
ER  - 

@article{
author = "Suljovrujić, Edin H. and Mićić, Maja M. and Miličević, Dejan S.",
year = "2013",
abstract = "The molecular relaxation behavior of an ice-quenched high density polyethylene (HDPE) subjected to solid-state stretching at elevated temperature (100 degrees C) to various draw ratios (up to lambda=13.7) was examined by means of dielectric spectroscopy. All relaxation zones (alpha, beta and gamma, in order of decreasing temperature) between 25 K and melting temperature were studied in the frequency range from 1 kHz to 1 MHz. The changes observed in different dielectric relaxations were related to the orientation-induced modifications of the structural and morphological parameters. In order to investigate orientation-induced structural changes, optical microscopy (OM), scanning electron microscopy (SEM), wide angle X-ray scattering (WAXS), and differential scanning calorimetry (DSC) were employed. Hermans orientation function (f(c)) was used to quantify the degree of crystal orientation. Complete disappearance of the already weak beta relaxation with orientation is attributed to the increase in crystallinity, but the contribution due to a more restricted chain segment mobility in the interlamellar regions of oriented specimens should also be taken into account. Presented results also reveal two different orientation-induced dynamics in the evolution of the dielectric alpha and gamma relaxations connected with the main transformation stages in the drawing of crystalline polymers. The transformation of the initial isotropic into a fully oriented fibrillar structure introduces large changes in the dielectric relaxation spectra of HDPE, especially in the alpha relaxation zone; by contrast, with further increase in the draw ratio much smaller changes are observed due to the deformation of the fiber structure by longitudinal sliding motions of microfibrils and/or by fibrils slipping past each other.",
journal = "Journal of Engineered Fibers and Fabrics",
title = "Uniaxially Oriented High Density Polyethylene",
volume = "8",
number = "3",
pages = "131-143",
url = "https://hdl.handle.net/21.15107/rcub_vinar_5686"
}

Suljovrujić, E. H., Mićić, M. M.,& Miličević, D. S.. (2013). Uniaxially Oriented High Density Polyethylene. in Journal of Engineered Fibers and Fabrics, 8(3), 131-143.
https://hdl.handle.net/21.15107/rcub_vinar_5686

Suljovrujić EH, Mićić MM, Miličević DS. Uniaxially Oriented High Density Polyethylene. in Journal of Engineered Fibers and Fabrics. 2013;8(3):131-143.
https://hdl.handle.net/21.15107/rcub_vinar_5686 .

Suljovrujić, Edin H., Mićić, Maja M., Miličević, Dejan S., "Uniaxially Oriented High Density Polyethylene" in Journal of Engineered Fibers and Fabrics, 8, no. 3 (2013):131-143,
https://hdl.handle.net/21.15107/rcub_vinar_5686 .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Milivojević, Dušan
AU  - Suljovrujić, Edin H.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6966
AB  - Poly-L-lactide (PLLA) is a well-known biodegradable and biocompatible semi-crystalline polymer, used in a wide variety of applications, from implantable medical devices and drug release matrices to environmentally friendly packaging materials: diversity in the initial preparation, morphology and crystallinity plays a significant role in most of these applications. On the other hand, gamma radiation, as a processing tool, has often been used for the sterilisation of sensitive polymeric materials. This study presents the influence of the initial preparation and crystallinity on the gamma radiation-induced evolution of free radicals in PLLA. For this purpose, PLLA samples with a large variation in crystallinity (below 20% and over 70%), prepared by two different procedures, were exposed to gamma radiation in air to absorbed doses of 25, 50 and 100 kGy. The annealing treatment was applied to part of the samples, too. The presence and evolution of free radicals were followed using electron spin resonance (ESR) spectroscopy for three weeks. Further characterisation was performed by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD) measurements. Presented results show that depending on the initial preparation conditions, the radiation-induced changes in structure and properties of PLLA, as well as the evolution of free radicals, can differ significantly. Furthermore, the annealing treatment substantially reduces the concentration of long-lived free radicals, but can also introduce significant crystallisation. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - The influence of the initial preparation and crystallinity on the free radical evolution in gamma irradiated PLLA
VL  - 81
IS  - 9
SP  - 1361
EP  - 1365
DO  - 10.1016/j.radphyschem.2011.11.037
ER  - 

@article{
author = "Miličević, Dejan S. and Milivojević, Dušan and Suljovrujić, Edin H.",
year = "2012",
abstract = "Poly-L-lactide (PLLA) is a well-known biodegradable and biocompatible semi-crystalline polymer, used in a wide variety of applications, from implantable medical devices and drug release matrices to environmentally friendly packaging materials: diversity in the initial preparation, morphology and crystallinity plays a significant role in most of these applications. On the other hand, gamma radiation, as a processing tool, has often been used for the sterilisation of sensitive polymeric materials. This study presents the influence of the initial preparation and crystallinity on the gamma radiation-induced evolution of free radicals in PLLA. For this purpose, PLLA samples with a large variation in crystallinity (below 20% and over 70%), prepared by two different procedures, were exposed to gamma radiation in air to absorbed doses of 25, 50 and 100 kGy. The annealing treatment was applied to part of the samples, too. The presence and evolution of free radicals were followed using electron spin resonance (ESR) spectroscopy for three weeks. Further characterisation was performed by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD) measurements. Presented results show that depending on the initial preparation conditions, the radiation-induced changes in structure and properties of PLLA, as well as the evolution of free radicals, can differ significantly. Furthermore, the annealing treatment substantially reduces the concentration of long-lived free radicals, but can also introduce significant crystallisation. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "The influence of the initial preparation and crystallinity on the free radical evolution in gamma irradiated PLLA",
volume = "81",
number = "9",
pages = "1361-1365",
doi = "10.1016/j.radphyschem.2011.11.037"
}

Miličević, D. S., Milivojević, D.,& Suljovrujić, E. H.. (2012). The influence of the initial preparation and crystallinity on the free radical evolution in gamma irradiated PLLA. in Radiation Physics and Chemistry, 81(9), 1361-1365.
https://doi.org/10.1016/j.radphyschem.2011.11.037

Miličević DS, Milivojević D, Suljovrujić EH. The influence of the initial preparation and crystallinity on the free radical evolution in gamma irradiated PLLA. in Radiation Physics and Chemistry. 2012;81(9):1361-1365.
doi:10.1016/j.radphyschem.2011.11.037 .

Miličević, Dejan S., Milivojević, Dušan, Suljovrujić, Edin H., "The influence of the initial preparation and crystallinity on the free radical evolution in gamma irradiated PLLA" in Radiation Physics and Chemistry, 81, no. 9 (2012):1361-1365,
https://doi.org/10.1016/j.radphyschem.2011.11.037 . .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Mićić, Maja M.
AU  - Stamboliev, G.
AU  - Leskovac, Andreja
AU  - Mitrić, Miodrag
AU  - Suljovrujić, Edin H.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4828
AB  - Different polyolefines (low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and isotactic polypropylene (iPP)) were oriented via solid-state stretching at an elevated temperature. In order to investigate orientation-induced changes in microstructure and crystallinity, optical microscopy (OM), scanning electron microscopy (SEM), wide angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC) were employed. To quantify the degree of molecular orientation WAXS data were used to calculate Hermans orientation function (f(c)); the results reinforce the morphological picture obtained from OM and SEM confirming Peterlins molecular model of drawing. Furthermore, orientation-induced changes in the crystalline phase, especially in its volume and perfection, were observed by DSC and WAXS. Comparison between these data showed that the biggest change in the degree of crystallinity was achieved during the transformation of the initial lamellar into fibrillar structure. After completion of this transformation further orientation, which occurs through plastic deformation of fibre structure, introduces only minor changes in crystallinity. The overall orientation-induced behaviour hasnt been considerably influenced by the structural differences amongst polyolefins.
T2  - Fibers and Polymers
T1  - Microstructure and Crystallinity of Polyolefins Oriented via Solid-state Stretching at an Elevated Temperature
VL  - 13
IS  - 4
SP  - 466
EP  - 470
DO  - 10.1007/s12221-012-0466-4
ER  - 

@article{
author = "Miličević, Dejan S. and Mićić, Maja M. and Stamboliev, G. and Leskovac, Andreja and Mitrić, Miodrag and Suljovrujić, Edin H.",
year = "2012",
abstract = "Different polyolefines (low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and isotactic polypropylene (iPP)) were oriented via solid-state stretching at an elevated temperature. In order to investigate orientation-induced changes in microstructure and crystallinity, optical microscopy (OM), scanning electron microscopy (SEM), wide angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC) were employed. To quantify the degree of molecular orientation WAXS data were used to calculate Hermans orientation function (f(c)); the results reinforce the morphological picture obtained from OM and SEM confirming Peterlins molecular model of drawing. Furthermore, orientation-induced changes in the crystalline phase, especially in its volume and perfection, were observed by DSC and WAXS. Comparison between these data showed that the biggest change in the degree of crystallinity was achieved during the transformation of the initial lamellar into fibrillar structure. After completion of this transformation further orientation, which occurs through plastic deformation of fibre structure, introduces only minor changes in crystallinity. The overall orientation-induced behaviour hasnt been considerably influenced by the structural differences amongst polyolefins.",
journal = "Fibers and Polymers",
title = "Microstructure and Crystallinity of Polyolefins Oriented via Solid-state Stretching at an Elevated Temperature",
volume = "13",
number = "4",
pages = "466-470",
doi = "10.1007/s12221-012-0466-4"
}

Miličević, D. S., Mićić, M. M., Stamboliev, G., Leskovac, A., Mitrić, M.,& Suljovrujić, E. H.. (2012). Microstructure and Crystallinity of Polyolefins Oriented via Solid-state Stretching at an Elevated Temperature. in Fibers and Polymers, 13(4), 466-470.
https://doi.org/10.1007/s12221-012-0466-4

Miličević DS, Mićić MM, Stamboliev G, Leskovac A, Mitrić M, Suljovrujić EH. Microstructure and Crystallinity of Polyolefins Oriented via Solid-state Stretching at an Elevated Temperature. in Fibers and Polymers. 2012;13(4):466-470.
doi:10.1007/s12221-012-0466-4 .

Miličević, Dejan S., Mićić, Maja M., Stamboliev, G., Leskovac, Andreja, Mitrić, Miodrag, Suljovrujić, Edin H., "Microstructure and Crystallinity of Polyolefins Oriented via Solid-state Stretching at an Elevated Temperature" in Fibers and Polymers, 13, no. 4 (2012):466-470,
https://doi.org/10.1007/s12221-012-0466-4 . .

TY  - JOUR
AU  - Galović, Slobodanka
AU  - Šećerov, Bojana Lj.
AU  - Trifunovic, S.
AU  - Miličević, Dejan S.
AU  - Suljovrujić, Edin H.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6967
AB  - Various polyethylenes (PEs) and the effects of high-energy radiation on their structures were widely studied in the past using conventional Differential Scanning Calorimetry (DSC) measurements. In this work, we used the Temperature Modulated Differential Scanning Calorimetry (TMDSC) technique in order to obtain more information about the influence of the initial structural differences and gamma radiation on the evolution in structure and thermal properties of different polyethylenes. For this reason, low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and high density polyethylene (HOPE) samples were exposed to gamma radiation, in air, to a wide range of absorbed doses (up to 2400 kGy). The separation of the total heat flow TMDSC signal into a reversing and non-reversing part enabled us to observe the low-temperature enthalpy relaxation (related to the existence of the rigid amorphous phase) and recrystallisation processes, as well as to follow their radiation-induced evolution and/or that of melting in a more revealing manner compared to the case of the conventional DSC. Consequently, our results indicate that TMDSC could improve the understanding of radiation-induced effects in polymers. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - A study of gamma-irradiated polyethylenes by temperature modulated differential scanning calorimetry
VL  - 81
IS  - 9
SP  - 1374
EP  - 1377
DO  - 10.1016/j.radphyschem.2011.11.054
ER  - 

@article{
author = "Galović, Slobodanka and Šećerov, Bojana Lj. and Trifunovic, S. and Miličević, Dejan S. and Suljovrujić, Edin H.",
year = "2012",
abstract = "Various polyethylenes (PEs) and the effects of high-energy radiation on their structures were widely studied in the past using conventional Differential Scanning Calorimetry (DSC) measurements. In this work, we used the Temperature Modulated Differential Scanning Calorimetry (TMDSC) technique in order to obtain more information about the influence of the initial structural differences and gamma radiation on the evolution in structure and thermal properties of different polyethylenes. For this reason, low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and high density polyethylene (HOPE) samples were exposed to gamma radiation, in air, to a wide range of absorbed doses (up to 2400 kGy). The separation of the total heat flow TMDSC signal into a reversing and non-reversing part enabled us to observe the low-temperature enthalpy relaxation (related to the existence of the rigid amorphous phase) and recrystallisation processes, as well as to follow their radiation-induced evolution and/or that of melting in a more revealing manner compared to the case of the conventional DSC. Consequently, our results indicate that TMDSC could improve the understanding of radiation-induced effects in polymers. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "A study of gamma-irradiated polyethylenes by temperature modulated differential scanning calorimetry",
volume = "81",
number = "9",
pages = "1374-1377",
doi = "10.1016/j.radphyschem.2011.11.054"
}

Galović, S., Šećerov, B. Lj., Trifunovic, S., Miličević, D. S.,& Suljovrujić, E. H.. (2012). A study of gamma-irradiated polyethylenes by temperature modulated differential scanning calorimetry. in Radiation Physics and Chemistry, 81(9), 1374-1377.
https://doi.org/10.1016/j.radphyschem.2011.11.054

Galović S, Šećerov BL, Trifunovic S, Miličević DS, Suljovrujić EH. A study of gamma-irradiated polyethylenes by temperature modulated differential scanning calorimetry. in Radiation Physics and Chemistry. 2012;81(9):1374-1377.
doi:10.1016/j.radphyschem.2011.11.054 .

Galović, Slobodanka, Šećerov, Bojana Lj., Trifunovic, S., Miličević, Dejan S., Suljovrujić, Edin H., "A study of gamma-irradiated polyethylenes by temperature modulated differential scanning calorimetry" in Radiation Physics and Chemistry, 81, no. 9 (2012):1374-1377,
https://doi.org/10.1016/j.radphyschem.2011.11.054 . .

TY  - JOUR
AU  - Trifunovic, Sasa B.
AU  - Miličević, Dejan S.
AU  - Mićić, Maja M.
AU  - Mudrinic, Tihana M.
AU  - Suljovrujić, Edin H.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4309
AB  - This paper presents the influence of ageing on the morphological and optical properties of TPD (N,N-bis(3-methylphenil)-N,N- diphenylbenzidine) thin films. Understanding of the nucleation mechanism and growth dynamics of molecular thin films is pivotal for controlling their morphology and the film interfacial properties, while the influence of ageing is essential for the potential commercial utilization. Initially, thin films were prepared using a combinatorial physical vapour deposition (CPVD) method, following a cosine-like distribution profile of thickness along mono-crystal silica substrate. Morphology of thin films was investigated by using optical (OM) and atomic force microscopy (AFM). The link between optical properties and the resulting thin film morphology was made by spatially correlated morphological (AFM and OM) and optical (absorption and photoluminescence) measurements. The changes in the absorption and photoluminescence spectra are strongly connected to the ageing-induced changes in the microstructure of thin films. Regardless of morphological and differences in the film thickness (two orders of magnitude), all films show amorphous arrangement just after the deposition. Ageing of these films in regular atmosphere conditions results in morphological and changes in optical properties induced by the crystallization. The crystallization of initially amorphous samples was also confirmed by the differentional scanning calorimetry (DSC) measurements. All results indicate the limited possibility of using TPD films in organic electroluminescent devices.
T2  - Hemijska industrija
T1  - The Influence of Ageing on the Morphological and Optical Properties of Thin Tpd Films
VL  - 65
IS  - 1
SP  - 9
EP  - 13
DO  - 10.2298/HEMIND100519062T
ER  - 

@article{
author = "Trifunovic, Sasa B. and Miličević, Dejan S. and Mićić, Maja M. and Mudrinic, Tihana M. and Suljovrujić, Edin H.",
year = "2011",
abstract = "This paper presents the influence of ageing on the morphological and optical properties of TPD (N,N-bis(3-methylphenil)-N,N- diphenylbenzidine) thin films. Understanding of the nucleation mechanism and growth dynamics of molecular thin films is pivotal for controlling their morphology and the film interfacial properties, while the influence of ageing is essential for the potential commercial utilization. Initially, thin films were prepared using a combinatorial physical vapour deposition (CPVD) method, following a cosine-like distribution profile of thickness along mono-crystal silica substrate. Morphology of thin films was investigated by using optical (OM) and atomic force microscopy (AFM). The link between optical properties and the resulting thin film morphology was made by spatially correlated morphological (AFM and OM) and optical (absorption and photoluminescence) measurements. The changes in the absorption and photoluminescence spectra are strongly connected to the ageing-induced changes in the microstructure of thin films. Regardless of morphological and differences in the film thickness (two orders of magnitude), all films show amorphous arrangement just after the deposition. Ageing of these films in regular atmosphere conditions results in morphological and changes in optical properties induced by the crystallization. The crystallization of initially amorphous samples was also confirmed by the differentional scanning calorimetry (DSC) measurements. All results indicate the limited possibility of using TPD films in organic electroluminescent devices.",
journal = "Hemijska industrija",
title = "The Influence of Ageing on the Morphological and Optical Properties of Thin Tpd Films",
volume = "65",
number = "1",
pages = "9-13",
doi = "10.2298/HEMIND100519062T"
}

Trifunovic, S. B., Miličević, D. S., Mićić, M. M., Mudrinic, T. M.,& Suljovrujić, E. H.. (2011). The Influence of Ageing on the Morphological and Optical Properties of Thin Tpd Films. in Hemijska industrija, 65(1), 9-13.
https://doi.org/10.2298/HEMIND100519062T

Trifunovic SB, Miličević DS, Mićić MM, Mudrinic TM, Suljovrujić EH. The Influence of Ageing on the Morphological and Optical Properties of Thin Tpd Films. in Hemijska industrija. 2011;65(1):9-13.
doi:10.2298/HEMIND100519062T .

Trifunovic, Sasa B., Miličević, Dejan S., Mićić, Maja M., Mudrinic, Tihana M., Suljovrujić, Edin H., "The Influence of Ageing on the Morphological and Optical Properties of Thin Tpd Films" in Hemijska industrija, 65, no. 1 (2011):9-13,
https://doi.org/10.2298/HEMIND100519062T . .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Trifunovic, Sasa B.
AU  - Mudrinic, Tihana M.
AU  - Leskovac, Andreja
AU  - Ignjatović, Nenad L.
AU  - Dojčilović, Jablan R.
AU  - Suljovrujić, Edin H.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4121
AB  - The influence of gamma radiation on the structure and glass transition behaviour of poly-L-lactide (PLLA) has been studied. Since PLLA exposed to high-energy radiation in the presence of air is prone to chain scission reactions and large degradation, changes in molecular weight were obtained by the gel permeation chromatography (GPC). Alterations in the glass transition behaviour were investigated by differential scanning calorimetry (DSC). The apparent activation energy, Delta H*, for the glass transition was determined on the basis of the heating rate dependence of the glass transition temperature, T(g). Our findings support the fact that chain scission is the main reason for the decrease of Tg and Delta H* with the absorbed dose. At low doses, despite large changes in molecular weight, only small alterations are observed in the glass transition temperature and apparent activation energy. Further increase in the absorbed dose introduces not only significant changes in the molecular weight but also in the glass transition temperature and the activation energy. Such glass transition behaviour is a manifestation of a well-known effect of molecular weight on Tg, postulated by the Fox-Flory equation. However, all the observed alterations are small and tolerable at absorbed doses required for sterilization (up to 25 kGy in most circumstances). Furthermore, this study reveals that the radiation-induced changes in the molecular weight and the glass transition temperature occur in a predictable and fairly accurate manner. Therefore, gamma radiation can be used not only for sterilization but also for tailoring desirable end-use properties of PLLA based implants.
T2  - Hemijska industrija
T1  - The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation
VL  - 64
IS  - 4
SP  - 275
EP  - 281
DO  - 10.2298/HEMIND100329020M
ER  - 

@article{
author = "Miličević, Dejan S. and Trifunovic, Sasa B. and Mudrinic, Tihana M. and Leskovac, Andreja and Ignjatović, Nenad L. and Dojčilović, Jablan R. and Suljovrujić, Edin H.",
year = "2010",
abstract = "The influence of gamma radiation on the structure and glass transition behaviour of poly-L-lactide (PLLA) has been studied. Since PLLA exposed to high-energy radiation in the presence of air is prone to chain scission reactions and large degradation, changes in molecular weight were obtained by the gel permeation chromatography (GPC). Alterations in the glass transition behaviour were investigated by differential scanning calorimetry (DSC). The apparent activation energy, Delta H*, for the glass transition was determined on the basis of the heating rate dependence of the glass transition temperature, T(g). Our findings support the fact that chain scission is the main reason for the decrease of Tg and Delta H* with the absorbed dose. At low doses, despite large changes in molecular weight, only small alterations are observed in the glass transition temperature and apparent activation energy. Further increase in the absorbed dose introduces not only significant changes in the molecular weight but also in the glass transition temperature and the activation energy. Such glass transition behaviour is a manifestation of a well-known effect of molecular weight on Tg, postulated by the Fox-Flory equation. However, all the observed alterations are small and tolerable at absorbed doses required for sterilization (up to 25 kGy in most circumstances). Furthermore, this study reveals that the radiation-induced changes in the molecular weight and the glass transition temperature occur in a predictable and fairly accurate manner. Therefore, gamma radiation can be used not only for sterilization but also for tailoring desirable end-use properties of PLLA based implants.",
journal = "Hemijska industrija",
title = "The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation",
volume = "64",
number = "4",
pages = "275-281",
doi = "10.2298/HEMIND100329020M"
}

Miličević, D. S., Trifunovic, S. B., Mudrinic, T. M., Leskovac, A., Ignjatović, N. L., Dojčilović, J. R.,& Suljovrujić, E. H.. (2010). The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation. in Hemijska industrija, 64(4), 275-281.
https://doi.org/10.2298/HEMIND100329020M

Miličević DS, Trifunovic SB, Mudrinic TM, Leskovac A, Ignjatović NL, Dojčilović JR, Suljovrujić EH. The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation. in Hemijska industrija. 2010;64(4):275-281.
doi:10.2298/HEMIND100329020M .

Miličević, Dejan S., Trifunovic, Sasa B., Mudrinic, Tihana M., Leskovac, Andreja, Ignjatović, Nenad L., Dojčilović, Jablan R., Suljovrujić, Edin H., "The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation" in Hemijska industrija, 64, no. 4 (2010):275-281,
https://doi.org/10.2298/HEMIND100329020M . .