TY  - JOUR
AU  - Danilović, Danijela
AU  - Trpkov, Đorđe
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
AU  - Pajović, Jelena
AU  - Škipina, Blanka
AU  - Dudić, Duško
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12650
AB  - This article reports on photodielectric properties of hydrocolloids of TiO2  particles and Au/TiO2 hybrid particles of lateral dimension of ∼200 nm. Illumination of the colloids with visible light did not cause measurable changes in their electrical conductivity, while the application of UV (365 nm) light led to photoinduced increase in conductivity of up to 2%. The photogeneration of ions in water, regardless of the presence of the particles, makes a dominant contribution to the photoinduced increase in conductivity of the colloids
T2  - Contemporary Materials
T1  - Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium
T1  - Фотодиелектрична карактеризација светлосног погона Au/TiO2 наномотори у течном медију
VL  - 14
IS  - 1
SP  - 25
EP  - 29
DO  - 10.7251/COMEN2301025D
ER  - 

@article{
author = "Danilović, Danijela and Trpkov, Đorđe and Dojčilović, Radovan and Tošić, Dragana and Pajović, Jelena and Škipina, Blanka and Dudić, Duško",
year = "2023",
abstract = "This article reports on photodielectric properties of hydrocolloids of TiO2  particles and Au/TiO2 hybrid particles of lateral dimension of ∼200 nm. Illumination of the colloids with visible light did not cause measurable changes in their electrical conductivity, while the application of UV (365 nm) light led to photoinduced increase in conductivity of up to 2%. The photogeneration of ions in water, regardless of the presence of the particles, makes a dominant contribution to the photoinduced increase in conductivity of the colloids",
journal = "Contemporary Materials",
title = "Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium, Фотодиелектрична карактеризација светлосног погона Au/TiO2 наномотори у течном медију",
volume = "14",
number = "1",
pages = "25-29",
doi = "10.7251/COMEN2301025D"
}

Danilović, D., Trpkov, Đ., Dojčilović, R., Tošić, D., Pajović, J., Škipina, B.,& Dudić, D.. (2023). Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium. in Contemporary Materials, 14(1), 25-29.
https://doi.org/10.7251/COMEN2301025D

Danilović D, Trpkov Đ, Dojčilović R, Tošić D, Pajović J, Škipina B, Dudić D. Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium. in Contemporary Materials. 2023;14(1):25-29.
doi:10.7251/COMEN2301025D .

Danilović, Danijela, Trpkov, Đorđe, Dojčilović, Radovan, Tošić, Dragana, Pajović, Jelena, Škipina, Blanka, Dudić, Duško, "Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium" in Contemporary Materials, 14, no. 1 (2023):25-29,
https://doi.org/10.7251/COMEN2301025D . .

TY  - JOUR
AU  - Đoković, Vladimir
AU  - Dudić, Duško
AU  - Dojčilović, Radovan
AU  - Marinković, Filip S.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11656
AB  - Barium titanate (BT) perovskite particles were surface modified by means of mechanical treatment and used as inorganic component in polyvinylidene fluoride (PVDF) based composites. The changes in electrical properties of the composite films with increasing in filler content were followed by dielectric spectroscopy, breakdown strength and D-E measurements. A comparison of the properties of the composites prepared with untreated and mechanically activated particles revealed that there is a significant difference in their performances at low filler concentrations (<20 wt%). Introduction of the surface modified ceramic particles into PVDF matrix led to an increase of the dielectric constant without affecting significantly the electrical breakdown strength. In contrast, when as received BT particles were used a filler, both dielectric constants and breakdown strengths of the composite films were lower than the corresponding values observed for the pure PVDF. At higher concentrations, however, the influence of pre-treatment of the filler on the effective electrical properties becomes less significant. The obtained results were discussed in terms of the pronounced crystallization of polar β and γ crystal phases of PVDF in the presence of surface modified BT fillers, which is confirmed by Raman spectroscopy.
T2  - Physica Scripta
T1  - Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content
VL  - 98
IS  - 11
SP  - 115932
DO  - 10.1088/1402-4896/acff4d
ER  - 

@article{
author = "Đoković, Vladimir and Dudić, Duško and Dojčilović, Radovan and Marinković, Filip S. and Pavlović, Vera P. and Pavlović, Vladimir B. and Vlahović, Branislav",
year = "2023",
abstract = "Barium titanate (BT) perovskite particles were surface modified by means of mechanical treatment and used as inorganic component in polyvinylidene fluoride (PVDF) based composites. The changes in electrical properties of the composite films with increasing in filler content were followed by dielectric spectroscopy, breakdown strength and D-E measurements. A comparison of the properties of the composites prepared with untreated and mechanically activated particles revealed that there is a significant difference in their performances at low filler concentrations (<20 wt%). Introduction of the surface modified ceramic particles into PVDF matrix led to an increase of the dielectric constant without affecting significantly the electrical breakdown strength. In contrast, when as received BT particles were used a filler, both dielectric constants and breakdown strengths of the composite films were lower than the corresponding values observed for the pure PVDF. At higher concentrations, however, the influence of pre-treatment of the filler on the effective electrical properties becomes less significant. The obtained results were discussed in terms of the pronounced crystallization of polar β and γ crystal phases of PVDF in the presence of surface modified BT fillers, which is confirmed by Raman spectroscopy.",
journal = "Physica Scripta",
title = "Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content",
volume = "98",
number = "11",
pages = "115932",
doi = "10.1088/1402-4896/acff4d"
}

Đoković, V., Dudić, D., Dojčilović, R., Marinković, F. S., Pavlović, V. P., Pavlović, V. B.,& Vlahović, B.. (2023). Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content. in Physica Scripta, 98(11), 115932.
https://doi.org/10.1088/1402-4896/acff4d

Đoković V, Dudić D, Dojčilović R, Marinković FS, Pavlović VP, Pavlović VB, Vlahović B. Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content. in Physica Scripta. 2023;98(11):115932.
doi:10.1088/1402-4896/acff4d .

Đoković, Vladimir, Dudić, Duško, Dojčilović, Radovan, Marinković, Filip S., Pavlović, Vera P., Pavlović, Vladimir B., Vlahović, Branislav, "Toward improved PVDF-BaTiO3 composite dielectrics: mechanical activation of the filler versus filler content" in Physica Scripta, 98, no. 11 (2023):115932,
https://doi.org/10.1088/1402-4896/acff4d . .

TY  - JOUR
AU  - Petronijević, Ivan M.
AU  - Dudić, Duško
AU  - Cerović, Dragana D.
AU  - Maletić, Slavica B.
AU  - Marinković, Filip
AU  - Pergal, Marija V.
AU  - Anđelković, Ljubica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11102
AB  - The dielectric properties of nanocomposites based on isotactic polypropylene (iPP) and atactic polystyrene (aPS) obtained by novel, simple, and environmentally friendly treatment technique have been analyzed in this study. The best treatment conditions to obtain nanocomposites with embedded core-shell particles with enhanced dielectric properties were considered. Treatment of polymer matrices in water solution iron(II)-chloride had the most pronounced precipitation effect, that was directly related to the appearance of higher transition metal concentrations in the iPP and aPS matrices, in comparison to treatments in the other two transition metal salts, MnCl2 and NiCl2. Relative dielectric constant and loss tangent have been studied in the frequency range from 20 Hz to 9 MHz. Embedded core-shell nanoparticles (from 15 to 150 nm in diameter) in a very small amount (1.72E-8 mol/cm3 to 1.17E-5 mol/cm3) resulted in significant improvement (2.5% up to 9.1%) and stabilization of relative dielectric constant value toward higher frequencies and also lowering loss tangent in compare to starting polymer matrices. These properties indicate that materials obtained with the presented treatment technique can be applied as microelectronic packing and with further development of the method in order to obtain a higher concentration of metal ions as energy storage devices.
T2  - Polymers for Advanced Technologies
T1  - Dielectric properties of iPP and aPS nanocomposites with core-shell particles obtained by treatment in transition metal salt solutions
VL  - 34
IS  - 9
SP  - 2841
EP  - 2850
DO  - 10.1002/pat.6110
ER  - 

@article{
author = "Petronijević, Ivan M. and Dudić, Duško and Cerović, Dragana D. and Maletić, Slavica B. and Marinković, Filip and Pergal, Marija V. and Anđelković, Ljubica",
year = "2023",
abstract = "The dielectric properties of nanocomposites based on isotactic polypropylene (iPP) and atactic polystyrene (aPS) obtained by novel, simple, and environmentally friendly treatment technique have been analyzed in this study. The best treatment conditions to obtain nanocomposites with embedded core-shell particles with enhanced dielectric properties were considered. Treatment of polymer matrices in water solution iron(II)-chloride had the most pronounced precipitation effect, that was directly related to the appearance of higher transition metal concentrations in the iPP and aPS matrices, in comparison to treatments in the other two transition metal salts, MnCl2 and NiCl2. Relative dielectric constant and loss tangent have been studied in the frequency range from 20 Hz to 9 MHz. Embedded core-shell nanoparticles (from 15 to 150 nm in diameter) in a very small amount (1.72E-8 mol/cm3 to 1.17E-5 mol/cm3) resulted in significant improvement (2.5% up to 9.1%) and stabilization of relative dielectric constant value toward higher frequencies and also lowering loss tangent in compare to starting polymer matrices. These properties indicate that materials obtained with the presented treatment technique can be applied as microelectronic packing and with further development of the method in order to obtain a higher concentration of metal ions as energy storage devices.",
journal = "Polymers for Advanced Technologies",
title = "Dielectric properties of iPP and aPS nanocomposites with core-shell particles obtained by treatment in transition metal salt solutions",
volume = "34",
number = "9",
pages = "2841-2850",
doi = "10.1002/pat.6110"
}

Petronijević, I. M., Dudić, D., Cerović, D. D., Maletić, S. B., Marinković, F., Pergal, M. V.,& Anđelković, L.. (2023). Dielectric properties of iPP and aPS nanocomposites with core-shell particles obtained by treatment in transition metal salt solutions. in Polymers for Advanced Technologies, 34(9), 2841-2850.
https://doi.org/10.1002/pat.6110

Petronijević IM, Dudić D, Cerović DD, Maletić SB, Marinković F, Pergal MV, Anđelković L. Dielectric properties of iPP and aPS nanocomposites with core-shell particles obtained by treatment in transition metal salt solutions. in Polymers for Advanced Technologies. 2023;34(9):2841-2850.
doi:10.1002/pat.6110 .

Petronijević, Ivan M., Dudić, Duško, Cerović, Dragana D., Maletić, Slavica B., Marinković, Filip, Pergal, Marija V., Anđelković, Ljubica, "Dielectric properties of iPP and aPS nanocomposites with core-shell particles obtained by treatment in transition metal salt solutions" in Polymers for Advanced Technologies, 34, no. 9 (2023):2841-2850,
https://doi.org/10.1002/pat.6110 . .

TY  - JOUR
AU  - Marinković, Filip S.
AU  - Škipina, Blanka
AU  - Vuković, Danijela
AU  - Langner, Ernst H. G.
AU  - Luyt, Adriaan S.
AU  - Dudić, Duško
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10602
AB  - Metal–organic frameworks (MOFs) are a class of materials that are increasingly used for the detection and separation of gases. This article presents the influence of gamma radiation on the dielectric properties of a LDPE/ZIF-8 composite that can be used for the production of gas sensors and massive gas absorbers. A low-density polyethylene (LDPE)–microsized zeolitic imidazolate framework-8 (ZIF-8) composite, obtained by melt mixing (95/5 weight ratio), was gamma-irradiated at room temperature to different absorbed doses up to 300 kGy. Infrared spectroscopy and optical microscopy confirmed the degradation of the ZIF-8 due to the gamma irradiation. The AC conductivity (admittance) of the samples was studied in the frequency range of 24 Hz − 120 kHz and a temperature range 200–350 K. The composite showed larger admittance components relative to the admittance components of pure LDPE; the conductance of the samples increased almost linearly with increasing irradiation dose. On the other hand, the change in dielectric permittivity of the LDPE and the composite due to irradiation was weak and showed nonlinear behavior with increasing radiation dose.
T2  - Journal of Macromolecular Science, Part B
T1  - AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite
SP  - 1
EP  - 9
DO  - 10.1080/00222348.2022.2159697
ER  - 

@article{
author = "Marinković, Filip S. and Škipina, Blanka and Vuković, Danijela and Langner, Ernst H. G. and Luyt, Adriaan S. and Dudić, Duško",
year = "2023",
abstract = "Metal–organic frameworks (MOFs) are a class of materials that are increasingly used for the detection and separation of gases. This article presents the influence of gamma radiation on the dielectric properties of a LDPE/ZIF-8 composite that can be used for the production of gas sensors and massive gas absorbers. A low-density polyethylene (LDPE)–microsized zeolitic imidazolate framework-8 (ZIF-8) composite, obtained by melt mixing (95/5 weight ratio), was gamma-irradiated at room temperature to different absorbed doses up to 300 kGy. Infrared spectroscopy and optical microscopy confirmed the degradation of the ZIF-8 due to the gamma irradiation. The AC conductivity (admittance) of the samples was studied in the frequency range of 24 Hz − 120 kHz and a temperature range 200–350 K. The composite showed larger admittance components relative to the admittance components of pure LDPE; the conductance of the samples increased almost linearly with increasing irradiation dose. On the other hand, the change in dielectric permittivity of the LDPE and the composite due to irradiation was weak and showed nonlinear behavior with increasing radiation dose.",
journal = "Journal of Macromolecular Science, Part B",
title = "AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite",
pages = "1-9",
doi = "10.1080/00222348.2022.2159697"
}

Marinković, F. S., Škipina, B., Vuković, D., Langner, E. H. G., Luyt, A. S.,& Dudić, D.. (2023). AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite. in Journal of Macromolecular Science, Part B, 1-9.
https://doi.org/10.1080/00222348.2022.2159697

Marinković FS, Škipina B, Vuković D, Langner EHG, Luyt AS, Dudić D. AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite. in Journal of Macromolecular Science, Part B. 2023;:1-9.
doi:10.1080/00222348.2022.2159697 .

Marinković, Filip S., Škipina, Blanka, Vuković, Danijela, Langner, Ernst H. G., Luyt, Adriaan S., Dudić, Duško, "AC Conductivity of Gamma Irradiated LDPE/ZIF-8 Composite" in Journal of Macromolecular Science, Part B (2023):1-9,
https://doi.org/10.1080/00222348.2022.2159697 . .

TY  - JOUR
AU  - Božanić, Dušan K.
AU  - Dojčilović, Radovan
AU  - Pajović, Jelena D.
AU  - Tošić, Dragana
AU  - Dudić, Duško
AU  - Réfrégiers, Matthieu
AU  - Đoković, Vladimir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10076
AB  - Fluorescent nanocomposite films were prepared by solution mixing of polyvinyl alcohol (PVA) and tryptophan functionalized silver (AgTrp) nanoparticles. Synchrotron excitation deep-ultraviolet (DUV) fluorescence imaging was used to follow the distribution of AgTrp nanoparticles within the polymer matrix. Pronounced growth of dendrite-like structures in the presence of AgTrp nanoparticles was confirmed by bright field and fluorescence imaging as well as with atomic force microscopies. Both tryptophan and AgTrp nanoparticles influence thermal properties of the matrix. Differential scanning calorimetry measurements showed that they reduce crystallinity and significantly increase the glass transition temperature of PVA (in the case of PVA-AgTrp film the Tg increases by ~20 °C). Dielectric properties of the films were studied under two different conditions (dark and illumination). The illumination with 250 nm light induces a significant increase in conductance of the PVA-AgTrp nanocomposite. The relative changes, with respect to the conductance measured in the dark, were almost ~200%.
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles
VL  - 634
SP  - 128050
DO  - 10.1016/j.colsurfa.2021.128050
ER  - 

@article{
author = "Božanić, Dušan K. and Dojčilović, Radovan and Pajović, Jelena D. and Tošić, Dragana and Dudić, Duško and Réfrégiers, Matthieu and Đoković, Vladimir",
year = "2022",
abstract = "Fluorescent nanocomposite films were prepared by solution mixing of polyvinyl alcohol (PVA) and tryptophan functionalized silver (AgTrp) nanoparticles. Synchrotron excitation deep-ultraviolet (DUV) fluorescence imaging was used to follow the distribution of AgTrp nanoparticles within the polymer matrix. Pronounced growth of dendrite-like structures in the presence of AgTrp nanoparticles was confirmed by bright field and fluorescence imaging as well as with atomic force microscopies. Both tryptophan and AgTrp nanoparticles influence thermal properties of the matrix. Differential scanning calorimetry measurements showed that they reduce crystallinity and significantly increase the glass transition temperature of PVA (in the case of PVA-AgTrp film the Tg increases by ~20 °C). Dielectric properties of the films were studied under two different conditions (dark and illumination). The illumination with 250 nm light induces a significant increase in conductance of the PVA-AgTrp nanocomposite. The relative changes, with respect to the conductance measured in the dark, were almost ~200%.",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles",
volume = "634",
pages = "128050",
doi = "10.1016/j.colsurfa.2021.128050"
}

Božanić, D. K., Dojčilović, R., Pajović, J. D., Tošić, D., Dudić, D., Réfrégiers, M.,& Đoković, V.. (2022). Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 634, 128050.
https://doi.org/10.1016/j.colsurfa.2021.128050

Božanić DK, Dojčilović R, Pajović JD, Tošić D, Dudić D, Réfrégiers M, Đoković V. Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2022;634:128050.
doi:10.1016/j.colsurfa.2021.128050 .

Božanić, Dušan K., Dojčilović, Radovan, Pajović, Jelena D., Tošić, Dragana, Dudić, Duško, Réfrégiers, Matthieu, Đoković, Vladimir, "Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 634 (2022):128050,
https://doi.org/10.1016/j.colsurfa.2021.128050 . .

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Tošić, Dragana
AU  - Dojčilović, Radovan
AU  - Dudić, Duško
AU  - Dramićanin, Miroslav
AU  - Medić, Mina M.
AU  - McPherson, Michael M.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
AU  - Đoković, Vladimir
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9563
AB  - Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz. © 2021 The Authors
T2  - Polymer Testing
T1  - PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix
VL  - 96
SP  - 107093
DO  - 10.1016/j.polymertesting.2021.107093
ER  - 

@article{
author = "Pavlović, Vera P. and Tošić, Dragana and Dojčilović, Radovan and Dudić, Duško and Dramićanin, Miroslav and Medić, Mina M. and McPherson, Michael M. and Pavlović, Vladimir B. and Vlahović, Branislav and Đoković, Vladimir",
year = "2021",
abstract = "Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz. © 2021 The Authors",
journal = "Polymer Testing",
title = "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix",
volume = "96",
pages = "107093",
doi = "10.1016/j.polymertesting.2021.107093"
}

Pavlović, V. P., Tošić, D., Dojčilović, R., Dudić, D., Dramićanin, M., Medić, M. M., McPherson, M. M., Pavlović, V. B., Vlahović, B.,& Đoković, V.. (2021). PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing, 96, 107093.
https://doi.org/10.1016/j.polymertesting.2021.107093

Pavlović VP, Tošić D, Dojčilović R, Dudić D, Dramićanin M, Medić MM, McPherson MM, Pavlović VB, Vlahović B, Đoković V. PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing. 2021;96:107093.
doi:10.1016/j.polymertesting.2021.107093 .

Pavlović, Vera P., Tošić, Dragana, Dojčilović, Radovan, Dudić, Duško, Dramićanin, Miroslav, Medić, Mina M., McPherson, Michael M., Pavlović, Vladimir B., Vlahović, Branislav, Đoković, Vladimir, "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix" in Polymer Testing, 96 (2021):107093,
https://doi.org/10.1016/j.polymertesting.2021.107093 . .

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  - JOUR
AU  - Vuković, Danijela
AU  - Škipina, Blanka
AU  - Maletić, Slavica
AU  - Cerović, Dragana D.
AU  - Duvenhage, Mart-Mari
AU  - Luyt, Adriaan Stephanus
AU  - Mirjanić, Dragoljub
AU  - Dudić, Duško
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9813
AB  - Polymer composite films of tris-(8-hydroxy-quinoline) aluminum (Alq3) and polymethyl methacrylate (PMMA) at two different concentrations were investigated. Dielectric properties of the samples were measured in broad frequency range and results show an increase in specific conductance and susceptance by adding Alq3 in PMMA. Changes in dielectric spectra caused by irradiation of the samples with LED lamps at different wavelengths were also recorded. The samples were examined by UV–Vis and Fourier transform infrared spectroscopy. The interaction between Alq3 and the polymer matrix was observed in the photoluminescence spectroscopy spectra. The doping of the PMMA with different concentrations of the Alq3 leads to the unique photodielectric properties of the resulting composite, and that is the main result of this study. Due to its interesting optical and photodielectric properties, PMMA/Alq3 film may find application in solar cells and optoelectronics.
T2  - Journal of Applied Polymer Science
T1  - The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites
VL  - 138
IS  - 39
SP  - 50992
DO  - 10.1002/app.50992
ER  - 

@article{
author = "Vuković, Danijela and Škipina, Blanka and Maletić, Slavica and Cerović, Dragana D. and Duvenhage, Mart-Mari and Luyt, Adriaan Stephanus and Mirjanić, Dragoljub and Dudić, Duško",
year = "2021",
abstract = "Polymer composite films of tris-(8-hydroxy-quinoline) aluminum (Alq3) and polymethyl methacrylate (PMMA) at two different concentrations were investigated. Dielectric properties of the samples were measured in broad frequency range and results show an increase in specific conductance and susceptance by adding Alq3 in PMMA. Changes in dielectric spectra caused by irradiation of the samples with LED lamps at different wavelengths were also recorded. The samples were examined by UV–Vis and Fourier transform infrared spectroscopy. The interaction between Alq3 and the polymer matrix was observed in the photoluminescence spectroscopy spectra. The doping of the PMMA with different concentrations of the Alq3 leads to the unique photodielectric properties of the resulting composite, and that is the main result of this study. Due to its interesting optical and photodielectric properties, PMMA/Alq3 film may find application in solar cells and optoelectronics.",
journal = "Journal of Applied Polymer Science",
title = "The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites",
volume = "138",
number = "39",
pages = "50992",
doi = "10.1002/app.50992"
}

Vuković, D., Škipina, B., Maletić, S., Cerović, D. D., Duvenhage, M., Luyt, A. S., Mirjanić, D.,& Dudić, D.. (2021). The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites. in Journal of Applied Polymer Science, 138(39), 50992.
https://doi.org/10.1002/app.50992

Vuković D, Škipina B, Maletić S, Cerović DD, Duvenhage M, Luyt AS, Mirjanić D, Dudić D. The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites. in Journal of Applied Polymer Science. 2021;138(39):50992.
doi:10.1002/app.50992 .

Vuković, Danijela, Škipina, Blanka, Maletić, Slavica, Cerović, Dragana D., Duvenhage, Mart-Mari, Luyt, Adriaan Stephanus, Mirjanić, Dragoljub, Dudić, Duško, "The study of optical and photodielectric properties of polymethyl methacrylate and tris-(8-hydroxy-quinoline) aluminum (Alq3) composites" in Journal of Applied Polymer Science, 138, no. 39 (2021):50992,
https://doi.org/10.1002/app.50992 . .

TY  - JOUR
AU  - Škipina, Blanka
AU  - Petronijević, Ivan M.
AU  - Luyt, Adriaan S.
AU  - Dojčinović, Biljana P.
AU  - Duvenhage, Mart Mari
AU  - Swart, Hendrik C.
AU  - Suljovrujić, Edin H.
AU  - Dudić, Duško
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9722
AB  - This study provides a new insight into the relationships between absorption and adsorption processes that occur during the treatment of iPP in aqueous solutions of metal-chloride salts, as well as the impact of these processes on the electrical conductivity of this nonpolar polymer. The polypropylene films (0.5 mm) were exposed to three-day treatments in aqueous solutions of chlorine salts of some alkali and transition metals at temperatures of 22 °C and 80 °C. The treatments induced an increase in the electrical conductivity of iPP, up to 800%. DC conductivity is not directly proportional to the concentrations of metals in the treated films due to the complex relationships between diffusion and adsorption processes. The experiment was set up to simulate the real-world conditions and the study provides practical knowledge on the stability of the electrical conductivity of iPP under exposure to aqueous solutions. The influence of electric aging on the electrical conductivity of the treated films was also examined.
PB  - Elsevier
T2  - Surfaces and Interfaces
T1  - Ionic diffusion in iPP: DC electrical conductivity
VL  - 21
SP  - 100772
DO  - 10.1016/j.surfin.2020.100772
ER  - 

@article{
author = "Škipina, Blanka and Petronijević, Ivan M. and Luyt, Adriaan S. and Dojčinović, Biljana P. and Duvenhage, Mart Mari and Swart, Hendrik C. and Suljovrujić, Edin H. and Dudić, Duško",
year = "2020",
abstract = "This study provides a new insight into the relationships between absorption and adsorption processes that occur during the treatment of iPP in aqueous solutions of metal-chloride salts, as well as the impact of these processes on the electrical conductivity of this nonpolar polymer. The polypropylene films (0.5 mm) were exposed to three-day treatments in aqueous solutions of chlorine salts of some alkali and transition metals at temperatures of 22 °C and 80 °C. The treatments induced an increase in the electrical conductivity of iPP, up to 800%. DC conductivity is not directly proportional to the concentrations of metals in the treated films due to the complex relationships between diffusion and adsorption processes. The experiment was set up to simulate the real-world conditions and the study provides practical knowledge on the stability of the electrical conductivity of iPP under exposure to aqueous solutions. The influence of electric aging on the electrical conductivity of the treated films was also examined.",
publisher = "Elsevier",
journal = "Surfaces and Interfaces",
title = "Ionic diffusion in iPP: DC electrical conductivity",
volume = "21",
pages = "100772",
doi = "10.1016/j.surfin.2020.100772"
}

Škipina, B., Petronijević, I. M., Luyt, A. S., Dojčinović, B. P., Duvenhage, M. M., Swart, H. C., Suljovrujić, E. H.,& Dudić, D.. (2020). Ionic diffusion in iPP: DC electrical conductivity. in Surfaces and Interfaces
Elsevier., 21, 100772.
https://doi.org/10.1016/j.surfin.2020.100772

Škipina B, Petronijević IM, Luyt AS, Dojčinović BP, Duvenhage MM, Swart HC, Suljovrujić EH, Dudić D. Ionic diffusion in iPP: DC electrical conductivity. in Surfaces and Interfaces. 2020;21:100772.
doi:10.1016/j.surfin.2020.100772 .

Škipina, Blanka, Petronijević, Ivan M., Luyt, Adriaan S., Dojčinović, Biljana P., Duvenhage, Mart Mari, Swart, Hendrik C., Suljovrujić, Edin H., Dudić, Duško, "Ionic diffusion in iPP: DC electrical conductivity" in Surfaces and Interfaces, 21 (2020):100772,
https://doi.org/10.1016/j.surfin.2020.100772 . .

TY  - JOUR
AU  - Hosakun, Worakan
AU  - Hosakun, Yanin
AU  - Dudić, Duško
AU  - Đoković, Vladimir
AU  - Csoka, Levente
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0142941818311358
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7864
AB  - Flexible and transparent substrate materials were fabricated by using bacterial cellulose (BC), silk fibroin protein (SF) and/or polyvinyl alcohol (PVA). The BC-SF and BC-SF-PVA films obtained were further modified by impregnation with silver nanocubes (AgNC). The influences of the silver nanocubes and white light illumination on the electric and viscoelastic properties of the films were investigated. Complex conductivity measurements showed that the films with PVA component are more sensitive to light exposure and there is an increase in conductance when the sample is illuminated. The films that contained silver nanocubes showed higher values of specific susceptance than their unmodified counterparts. DMA analyses revealed that the storage shear moduli of the films increase with addition of silver nanocubes. It was also found that the relaxation transition observed at elevated temperatures in the BC-SF-PVA-AgNC films is highly sensitive to the light exposure. Above the glass transition of PVA, both storage- and loss-shear moduli change dramatically if the sample is illuminated during the measurements with respect to the case when it was kept in the dark. © 2018
T2  - Polymer Testing
T1  - Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure
VL  - 71
SP  - 110
EP  - 114
DO  - 10.1016/j.polymertesting.2018.08.031
ER  - 

@article{
author = "Hosakun, Worakan and Hosakun, Yanin and Dudić, Duško and Đoković, Vladimir and Csoka, Levente",
year = "2018",
abstract = "Flexible and transparent substrate materials were fabricated by using bacterial cellulose (BC), silk fibroin protein (SF) and/or polyvinyl alcohol (PVA). The BC-SF and BC-SF-PVA films obtained were further modified by impregnation with silver nanocubes (AgNC). The influences of the silver nanocubes and white light illumination on the electric and viscoelastic properties of the films were investigated. Complex conductivity measurements showed that the films with PVA component are more sensitive to light exposure and there is an increase in conductance when the sample is illuminated. The films that contained silver nanocubes showed higher values of specific susceptance than their unmodified counterparts. DMA analyses revealed that the storage shear moduli of the films increase with addition of silver nanocubes. It was also found that the relaxation transition observed at elevated temperatures in the BC-SF-PVA-AgNC films is highly sensitive to the light exposure. Above the glass transition of PVA, both storage- and loss-shear moduli change dramatically if the sample is illuminated during the measurements with respect to the case when it was kept in the dark. © 2018",
journal = "Polymer Testing",
title = "Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure",
volume = "71",
pages = "110-114",
doi = "10.1016/j.polymertesting.2018.08.031"
}

Hosakun, W., Hosakun, Y., Dudić, D., Đoković, V.,& Csoka, L.. (2018). Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure. in Polymer Testing, 71, 110-114.
https://doi.org/10.1016/j.polymertesting.2018.08.031

Hosakun W, Hosakun Y, Dudić D, Đoković V, Csoka L. Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure. in Polymer Testing. 2018;71:110-114.
doi:10.1016/j.polymertesting.2018.08.031 .

Hosakun, Worakan, Hosakun, Yanin, Dudić, Duško, Đoković, Vladimir, Csoka, Levente, "Dependence of mechanical and electrical properties of silver nanocubes impregnated bacterial cellulose-silk fibroin-polyvinyl alcohol films on light exposure" in Polymer Testing, 71 (2018):110-114,
https://doi.org/10.1016/j.polymertesting.2018.08.031 . .

TY  - JOUR
AU  - Petronijević, Ivan M.
AU  - Cerović, Dragana D.
AU  - Dudić, Duško
AU  - Dojčilović, Jablan R.
AU  - Dojčinović, Biljana P.
AU  - Pergal, Marija V.
PY  - 2018
UR  - http://doi.wiley.com/10.1002/pat.4289
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7708
AB  - In this paper, a new simple and environmentally friendly treatment technique for obtaining polymer nanocomposites with appropriate dielectric properties has been presented. Sheets of isotactic polypropylene and atactic polystyrene were immersed in 3 saturated water solutions of alkali metal salts (LiCl, NaCl, and KCl) at 2 fixed temperatures (23°C and 90°C), and 3 DC electrical potentials (+4 kV, −4 kV, and ground potential) were applied. A quantification of alkali metals in the polymer sheets was conducted by inductively coupled plasma optic emission spectrometry. The obtained concentration values were from 7.38·10−9 mol/cm3to 1.25·10−7 mol/cm3. The qualitative analysis of potassium distribution in the polymer matrix was conducted by time-of-flight secondary ion mass spectrometry cross-sectional record. The relative dielectric constant (ε′) of samples was investigated in the frequency range from 20 Hz to 9 MHz at the constant temperature of 22°C. Stable values of ε′ in fully measured frequency range were observed for both pure and treated samples. Next, the results of the dielectric spectroscopy measurements were compared and established the kind of treatment that provided the highest value of ε′. The relationship between the concentrations of alkali metals and the values of relative dielectric constant was determined for the samples obtained by a treatment at 90°C and +4 kV.
T2  - Polymers for Advanced Technologies
T1  - Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts
VL  - 29
IS  - 6
SP  - 1826
EP  - 1833
DO  - 10.1002/pat.4289
ER  - 

@article{
author = "Petronijević, Ivan M. and Cerović, Dragana D. and Dudić, Duško and Dojčilović, Jablan R. and Dojčinović, Biljana P. and Pergal, Marija V.",
year = "2018",
abstract = "In this paper, a new simple and environmentally friendly treatment technique for obtaining polymer nanocomposites with appropriate dielectric properties has been presented. Sheets of isotactic polypropylene and atactic polystyrene were immersed in 3 saturated water solutions of alkali metal salts (LiCl, NaCl, and KCl) at 2 fixed temperatures (23°C and 90°C), and 3 DC electrical potentials (+4 kV, −4 kV, and ground potential) were applied. A quantification of alkali metals in the polymer sheets was conducted by inductively coupled plasma optic emission spectrometry. The obtained concentration values were from 7.38·10−9 mol/cm3to 1.25·10−7 mol/cm3. The qualitative analysis of potassium distribution in the polymer matrix was conducted by time-of-flight secondary ion mass spectrometry cross-sectional record. The relative dielectric constant (ε′) of samples was investigated in the frequency range from 20 Hz to 9 MHz at the constant temperature of 22°C. Stable values of ε′ in fully measured frequency range were observed for both pure and treated samples. Next, the results of the dielectric spectroscopy measurements were compared and established the kind of treatment that provided the highest value of ε′. The relationship between the concentrations of alkali metals and the values of relative dielectric constant was determined for the samples obtained by a treatment at 90°C and +4 kV.",
journal = "Polymers for Advanced Technologies",
title = "Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts",
volume = "29",
number = "6",
pages = "1826-1833",
doi = "10.1002/pat.4289"
}

Petronijević, I. M., Cerović, D. D., Dudić, D., Dojčilović, J. R., Dojčinović, B. P.,& Pergal, M. V.. (2018). Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts. in Polymers for Advanced Technologies, 29(6), 1826-1833.
https://doi.org/10.1002/pat.4289

Petronijević IM, Cerović DD, Dudić D, Dojčilović JR, Dojčinović BP, Pergal MV. Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts. in Polymers for Advanced Technologies. 2018;29(6):1826-1833.
doi:10.1002/pat.4289 .

Petronijević, Ivan M., Cerović, Dragana D., Dudić, Duško, Dojčilović, Jablan R., Dojčinović, Biljana P., Pergal, Marija V., "Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts" in Polymers for Advanced Technologies, 29, no. 6 (2018):1826-1833,
https://doi.org/10.1002/pat.4289 . .

TY  - JOUR
AU  - Škipina, Blanka
AU  - Luyt, Adriaan S.
AU  - Csoka, Levente
AU  - Đoković, Vladimir
AU  - Dudić, Duško
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1922
AB  - The article describes the influence of humidity on the surface photodielectric properties of papers prepared from poly(ethyleneimine)-TiO2 hanoparticles-anthocyanin modified cellulose fibres. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red wine and red currant juice. The samples were conditioned to various relative humidities (from 9 to 100%) and illuminated with white visible light, lambda GT = 405 nm. The poly(ethyleneimine)-TiO2-anthocyanin modified samples showed similar photodielectric behaviour that can be clearly distinguished from the samples modified solely with poly(ethyleneimine)-TiO2. Generally, an increase in humidity enhances the conductivity of the samples and induces an increase in the amount of photo-induced charge. Also, at higher humidities (above 80%), the samples with anthocyanin showed significantly higher values of photo-induced charges with respect to anthocyanin free samples. The presented results suggest that the presence of water molecules promotes electron-injection processes from the anthocyanin to the semiconductor surface. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Dyes and Pigments
T1  - Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities
VL  - 149
SP  - 51
EP  - 58
DO  - 10.1016/j.dyepig.2017.08.064
ER  - 

@article{
author = "Škipina, Blanka and Luyt, Adriaan S. and Csoka, Levente and Đoković, Vladimir and Dudić, Duško",
year = "2018",
abstract = "The article describes the influence of humidity on the surface photodielectric properties of papers prepared from poly(ethyleneimine)-TiO2 hanoparticles-anthocyanin modified cellulose fibres. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red wine and red currant juice. The samples were conditioned to various relative humidities (from 9 to 100%) and illuminated with white visible light, lambda GT = 405 nm. The poly(ethyleneimine)-TiO2-anthocyanin modified samples showed similar photodielectric behaviour that can be clearly distinguished from the samples modified solely with poly(ethyleneimine)-TiO2. Generally, an increase in humidity enhances the conductivity of the samples and induces an increase in the amount of photo-induced charge. Also, at higher humidities (above 80%), the samples with anthocyanin showed significantly higher values of photo-induced charges with respect to anthocyanin free samples. The presented results suggest that the presence of water molecules promotes electron-injection processes from the anthocyanin to the semiconductor surface. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Dyes and Pigments",
title = "Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities",
volume = "149",
pages = "51-58",
doi = "10.1016/j.dyepig.2017.08.064"
}

Škipina, B., Luyt, A. S., Csoka, L., Đoković, V.,& Dudić, D.. (2018). Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities. in Dyes and Pigments, 149, 51-58.
https://doi.org/10.1016/j.dyepig.2017.08.064

Škipina B, Luyt AS, Csoka L, Đoković V, Dudić D. Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities. in Dyes and Pigments. 2018;149:51-58.
doi:10.1016/j.dyepig.2017.08.064 .

Škipina, Blanka, Luyt, Adriaan S., Csoka, Levente, Đoković, Vladimir, Dudić, Duško, "Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities" in Dyes and Pigments, 149 (2018):51-58,
https://doi.org/10.1016/j.dyepig.2017.08.064 . .

TY  - JOUR
AU  - Luyt, Adriaan S.
AU  - Škipina, Blanka
AU  - Csoka, Levente
AU  - Dudić, Duško
PY  - 2018
UR  - http://link.springer.com/10.1007/s00226-018-0994-1
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7629
AB  - Modified cellulose materials are finding increasing application in electronics, because of the need for more environmental-friendly electronic circuits. The papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres are completely environmentally friendly and can be applied to the construction of photocells or photo-/humidity sensors. To better understand the mechanisms of electrical conductivity of the said cellulose composites, the effect of humidity (RH = 9% -> 100%) on its dielectric properties is presented in this article. The possibility of trapping the negative and positive charges in the composite under different humidity conditions is also examined. A large number of studies suggest that proton conductivity, stimulated by humidity, is the dominant mechanism of electrical conductivity in cellulose-based materials. The results presented in this paper indicate that the electronic conductivity mechanisms also play a significant role in papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres.
T2  - Wood Science and Technology
T1  - Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres
VL  - 52
IS  - 3
SP  - 637
EP  - 651
DO  - 10.1007/s00226-018-0994-1
ER  - 

@article{
author = "Luyt, Adriaan S. and Škipina, Blanka and Csoka, Levente and Dudić, Duško",
year = "2018",
abstract = "Modified cellulose materials are finding increasing application in electronics, because of the need for more environmental-friendly electronic circuits. The papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres are completely environmentally friendly and can be applied to the construction of photocells or photo-/humidity sensors. To better understand the mechanisms of electrical conductivity of the said cellulose composites, the effect of humidity (RH = 9% -> 100%) on its dielectric properties is presented in this article. The possibility of trapping the negative and positive charges in the composite under different humidity conditions is also examined. A large number of studies suggest that proton conductivity, stimulated by humidity, is the dominant mechanism of electrical conductivity in cellulose-based materials. The results presented in this paper indicate that the electronic conductivity mechanisms also play a significant role in papers prepared from poly(ethyleneimine)-TiO2-anthocyanin-modified cellulose fibres.",
journal = "Wood Science and Technology",
title = "Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres",
volume = "52",
number = "3",
pages = "637-651",
doi = "10.1007/s00226-018-0994-1"
}

Luyt, A. S., Škipina, B., Csoka, L.,& Dudić, D.. (2018). Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres. in Wood Science and Technology, 52(3), 637-651.
https://doi.org/10.1007/s00226-018-0994-1

Luyt AS, Škipina B, Csoka L, Dudić D. Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres. in Wood Science and Technology. 2018;52(3):637-651.
doi:10.1007/s00226-018-0994-1 .

Luyt, Adriaan S., Škipina, Blanka, Csoka, Levente, Dudić, Duško, "Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres" in Wood Science and Technology, 52, no. 3 (2018):637-651,
https://doi.org/10.1007/s00226-018-0994-1 . .

TY  - JOUR
AU  - Motloung, Benison T.
AU  - Dudić, Duško
AU  - Mofokeng, Julia P.
AU  - Luyt, Adriaan S.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1486
AB  - This paper reports on the presence of wax and radiation-induced crosslinking on the morphology, thermal and mechanical properties, as well as electrical conductivity and thermo-switch properties of LDPE containing different amounts of carbon black (CB) or carbon black plus zinc metal as filler. Although the filler was generally well dispersed in the polymer or polymer/wax blend, there were clear indications of the formation of conductive pathways. Different combinations of polymer, wax, CB and zinc filler and radiation induced crosslinking gave rise to different extents of crystallinity and/or chain immobilization, which had an influence on the mechanical and thermo-mechanical properties, and on the electrical conductivity and thermo-switch behaviour. Most importantly, the presence of wax, and CB and CB/Zn fillers, gave rise to increased electrical conductivity. The thermal expansion in the composites did not seem to play a significant role in obtaining larger values of the positive temperature coefficient of resistivity (PTC). We found that the presence of a small amount of paraffin wax significantly increased the PTC coefficients of the LDPE based conductive composites, and that gamma-radiation induced crosslinking provided the thermo-mechanical stability of the amorphous regions in LDPE needed to obtain a high PTC intensity, which would provide a cheap material with good thermo-switch functionality, which is something not observed before.
T2  - Journal of Polymer Research
T1  - Properties and thermo-switch behaviour of LDPE mixed with carbon black, zinc metal and paraffin wax
VL  - 24
IS  - 3
DO  - 10.1007/s10965-017-1205-8
ER  - 

@article{
author = "Motloung, Benison T. and Dudić, Duško and Mofokeng, Julia P. and Luyt, Adriaan S.",
year = "2017",
abstract = "This paper reports on the presence of wax and radiation-induced crosslinking on the morphology, thermal and mechanical properties, as well as electrical conductivity and thermo-switch properties of LDPE containing different amounts of carbon black (CB) or carbon black plus zinc metal as filler. Although the filler was generally well dispersed in the polymer or polymer/wax blend, there were clear indications of the formation of conductive pathways. Different combinations of polymer, wax, CB and zinc filler and radiation induced crosslinking gave rise to different extents of crystallinity and/or chain immobilization, which had an influence on the mechanical and thermo-mechanical properties, and on the electrical conductivity and thermo-switch behaviour. Most importantly, the presence of wax, and CB and CB/Zn fillers, gave rise to increased electrical conductivity. The thermal expansion in the composites did not seem to play a significant role in obtaining larger values of the positive temperature coefficient of resistivity (PTC). We found that the presence of a small amount of paraffin wax significantly increased the PTC coefficients of the LDPE based conductive composites, and that gamma-radiation induced crosslinking provided the thermo-mechanical stability of the amorphous regions in LDPE needed to obtain a high PTC intensity, which would provide a cheap material with good thermo-switch functionality, which is something not observed before.",
journal = "Journal of Polymer Research",
title = "Properties and thermo-switch behaviour of LDPE mixed with carbon black, zinc metal and paraffin wax",
volume = "24",
number = "3",
doi = "10.1007/s10965-017-1205-8"
}

Motloung, B. T., Dudić, D., Mofokeng, J. P.,& Luyt, A. S.. (2017). Properties and thermo-switch behaviour of LDPE mixed with carbon black, zinc metal and paraffin wax. in Journal of Polymer Research, 24(3).
https://doi.org/10.1007/s10965-017-1205-8

Motloung BT, Dudić D, Mofokeng JP, Luyt AS. Properties and thermo-switch behaviour of LDPE mixed with carbon black, zinc metal and paraffin wax. in Journal of Polymer Research. 2017;24(3).
doi:10.1007/s10965-017-1205-8 .

Motloung, Benison T., Dudić, Duško, Mofokeng, Julia P., Luyt, Adriaan S., "Properties and thermo-switch behaviour of LDPE mixed with carbon black, zinc metal and paraffin wax" in Journal of Polymer Research, 24, no. 3 (2017),
https://doi.org/10.1007/s10965-017-1205-8 . .

TY  - JOUR
AU  - Dudić, Duško
AU  - Luyt, Adriaan S.
AU  - Marinković, Filip S.
AU  - Petronijević, Ivan M.
AU  - Dojčilović, Jablan R.
AU  - Kostoski, Dušan
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/341
AB  - Electrical AC conductivity of semiconducting low-density polyethylene (LDPE)-carbon black (CB) composites has been studied in the frequency range between 24 Hz and 75 kHz and the temperature range from 295 to 355 K. The composites were gamma irradiated at room temperature to different absorbed doses up to 300 kGy. The effects of gamma irradiation on the AC conductivity at room temperature and the conductive temperature coefficients (CTC) were observed. It was found that the effect of gamma irradiation on the stability of AC conductivity at elevated temperature (355 K) is dependent on the carbon black content and the gamma irradiation dose. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - The effect of gamma irradiation on the thermal behavior of dielectric properties of linear low-density/carbon black semiconductive composites
VL  - 107
SP  - 89
EP  - 94
DO  - 10.1016/j.radphyschem.2014.10.003
ER  - 

@article{
author = "Dudić, Duško and Luyt, Adriaan S. and Marinković, Filip S. and Petronijević, Ivan M. and Dojčilović, Jablan R. and Kostoski, Dušan",
year = "2015",
abstract = "Electrical AC conductivity of semiconducting low-density polyethylene (LDPE)-carbon black (CB) composites has been studied in the frequency range between 24 Hz and 75 kHz and the temperature range from 295 to 355 K. The composites were gamma irradiated at room temperature to different absorbed doses up to 300 kGy. The effects of gamma irradiation on the AC conductivity at room temperature and the conductive temperature coefficients (CTC) were observed. It was found that the effect of gamma irradiation on the stability of AC conductivity at elevated temperature (355 K) is dependent on the carbon black content and the gamma irradiation dose. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "The effect of gamma irradiation on the thermal behavior of dielectric properties of linear low-density/carbon black semiconductive composites",
volume = "107",
pages = "89-94",
doi = "10.1016/j.radphyschem.2014.10.003"
}

Dudić, D., Luyt, A. S., Marinković, F. S., Petronijević, I. M., Dojčilović, J. R.,& Kostoski, D.. (2015). The effect of gamma irradiation on the thermal behavior of dielectric properties of linear low-density/carbon black semiconductive composites. in Radiation Physics and Chemistry, 107, 89-94.
https://doi.org/10.1016/j.radphyschem.2014.10.003

Dudić D, Luyt AS, Marinković FS, Petronijević IM, Dojčilović JR, Kostoski D. The effect of gamma irradiation on the thermal behavior of dielectric properties of linear low-density/carbon black semiconductive composites. in Radiation Physics and Chemistry. 2015;107:89-94.
doi:10.1016/j.radphyschem.2014.10.003 .

Dudić, Duško, Luyt, Adriaan S., Marinković, Filip S., Petronijević, Ivan M., Dojčilović, Jablan R., Kostoski, Dušan, "The effect of gamma irradiation on the thermal behavior of dielectric properties of linear low-density/carbon black semiconductive composites" in Radiation Physics and Chemistry, 107 (2015):89-94,
https://doi.org/10.1016/j.radphyschem.2014.10.003 . .

TY  - JOUR
AU  - Csoka, Levente
AU  - Dudić, Duško
AU  - Petronijević, Ivan M.
AU  - Rozsa, C.
AU  - Halasz, K.
AU  - Đoković, Vladimir
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/439
AB  - Poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fiber sheets were prepared as a support material for dye-sensitized solar cells. The study is focused on the effects of different anthocyanins on the photo-induced changes and contact relaxation of the surface AC-conductivity of the papers. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red vine and red currant juice. The results showed that there were pronounced contact relaxation effects at the interfaces between alumina electrode and the papers, which were further affected by the presence of anthocyanins. The electrode effects are mainly manifested by a decrease in conductance, which falls by about 30 % from its initial value about 400 min after the beginning of the experiment carried out in the dark. The illumination of the samples induces an increase in the magnitude of the observed changes in conductance but does not affect the nature of the relaxation processes. By estimating the temperature coefficients of conductivity of the papers and the changes in temperature during the illumination of the samples, we succeeded to separate the effects of heating from the total effects of illumination on the conductance and susceptance of the papers.
T2  - Cellulose
T1  - Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers
VL  - 22
IS  - 1
SP  - 779
EP  - 788
DO  - 10.1007/s10570-014-0537-3
ER  - 

@article{
author = "Csoka, Levente and Dudić, Duško and Petronijević, Ivan M. and Rozsa, C. and Halasz, K. and Đoković, Vladimir",
year = "2015",
abstract = "Poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fiber sheets were prepared as a support material for dye-sensitized solar cells. The study is focused on the effects of different anthocyanins on the photo-induced changes and contact relaxation of the surface AC-conductivity of the papers. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red vine and red currant juice. The results showed that there were pronounced contact relaxation effects at the interfaces between alumina electrode and the papers, which were further affected by the presence of anthocyanins. The electrode effects are mainly manifested by a decrease in conductance, which falls by about 30 % from its initial value about 400 min after the beginning of the experiment carried out in the dark. The illumination of the samples induces an increase in the magnitude of the observed changes in conductance but does not affect the nature of the relaxation processes. By estimating the temperature coefficients of conductivity of the papers and the changes in temperature during the illumination of the samples, we succeeded to separate the effects of heating from the total effects of illumination on the conductance and susceptance of the papers.",
journal = "Cellulose",
title = "Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers",
volume = "22",
number = "1",
pages = "779-788",
doi = "10.1007/s10570-014-0537-3"
}

Csoka, L., Dudić, D., Petronijević, I. M., Rozsa, C., Halasz, K.,& Đoković, V.. (2015). Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers. in Cellulose, 22(1), 779-788.
https://doi.org/10.1007/s10570-014-0537-3

Csoka L, Dudić D, Petronijević IM, Rozsa C, Halasz K, Đoković V. Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers. in Cellulose. 2015;22(1):779-788.
doi:10.1007/s10570-014-0537-3 .

Csoka, Levente, Dudić, Duško, Petronijević, Ivan M., Rozsa, C., Halasz, K., Đoković, Vladimir, "Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers" in Cellulose, 22, no. 1 (2015):779-788,
https://doi.org/10.1007/s10570-014-0537-3 . .

TY  - JOUR
AU  - Molaba, M. P.
AU  - Dudić, Duško
AU  - Luyt, Adriaan S.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/694
AB  - The aim of this study was to investigate the presence of wax, different Ag nanoparticle contents, and different cooling rates from the melt, on the morphology, thermal and electrical conductivity, and dynamic mechanical properties of iPP. The Ag particles were well dispersed in the polymer, and formed nucleation centres for the crystallization of iPP. They were also well dispersed in iPP/wax, but they were located in the wax phase which was dispersed between the iPP spherulites. Generally the extent of filler agglomeration increased with increasing filler content. The Ag particles, whether in the iPP or wax phase, had little influence on the crystallinities and melting temperatures of iPP. The presence of Ag particles in iPP had little influence on its modulus, but the presence of both wax and Ag particles significantly improved the modulus of these nanocomposites. The thermal and electrical conductivities of the samples more significantly improved when both wax and Ag were present. With increasing Ag particle contents in both iPP/Ag and iPP/wax/Ag, the thermal conductivities increased, but leveled off at higher filler contents, while the electrical conductivities continuously increased with increasing filler contents. The slowly cooled samples had higher crystallinities than the quenched samples and therefore they were more thermally conductive than the quenched samples.
T2  - Express Polymer Letters
T1  - Influence of the presence of medium-soft paraffin wax on the morphology and properties of iPP/silver nanocomposites
VL  - 9
IS  - 10
SP  - 901
EP  - 915
DO  - 10.3144/expresspolymlett.2015.82
ER  - 

@article{
author = "Molaba, M. P. and Dudić, Duško and Luyt, Adriaan S.",
year = "2015",
abstract = "The aim of this study was to investigate the presence of wax, different Ag nanoparticle contents, and different cooling rates from the melt, on the morphology, thermal and electrical conductivity, and dynamic mechanical properties of iPP. The Ag particles were well dispersed in the polymer, and formed nucleation centres for the crystallization of iPP. They were also well dispersed in iPP/wax, but they were located in the wax phase which was dispersed between the iPP spherulites. Generally the extent of filler agglomeration increased with increasing filler content. The Ag particles, whether in the iPP or wax phase, had little influence on the crystallinities and melting temperatures of iPP. The presence of Ag particles in iPP had little influence on its modulus, but the presence of both wax and Ag particles significantly improved the modulus of these nanocomposites. The thermal and electrical conductivities of the samples more significantly improved when both wax and Ag were present. With increasing Ag particle contents in both iPP/Ag and iPP/wax/Ag, the thermal conductivities increased, but leveled off at higher filler contents, while the electrical conductivities continuously increased with increasing filler contents. The slowly cooled samples had higher crystallinities than the quenched samples and therefore they were more thermally conductive than the quenched samples.",
journal = "Express Polymer Letters",
title = "Influence of the presence of medium-soft paraffin wax on the morphology and properties of iPP/silver nanocomposites",
volume = "9",
number = "10",
pages = "901-915",
doi = "10.3144/expresspolymlett.2015.82"
}

Molaba, M. P., Dudić, D.,& Luyt, A. S.. (2015). Influence of the presence of medium-soft paraffin wax on the morphology and properties of iPP/silver nanocomposites. in Express Polymer Letters, 9(10), 901-915.
https://doi.org/10.3144/expresspolymlett.2015.82

Molaba MP, Dudić D, Luyt AS. Influence of the presence of medium-soft paraffin wax on the morphology and properties of iPP/silver nanocomposites. in Express Polymer Letters. 2015;9(10):901-915.
doi:10.3144/expresspolymlett.2015.82 .

Molaba, M. P., Dudić, Duško, Luyt, Adriaan S., "Influence of the presence of medium-soft paraffin wax on the morphology and properties of iPP/silver nanocomposites" in Express Polymer Letters, 9, no. 10 (2015):901-915,
https://doi.org/10.3144/expresspolymlett.2015.82 . .

TY  - JOUR
AU  - Mofokeng, Tladi G.
AU  - Luyt, Adriaan S.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Dudić, Duško
AU  - Vlahović, Branislav
AU  - Đoković, Vladimir
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5919
AB  - Nanocomposites of polyvinylidene fluoride/polymethyl methacrylate (PVDF/PMMA) blend and mechanically activated barium titanate (BaTiO3) particles were prepared by melt mixing. Modification of filler by means of mechanical activation has a profound effect on the crystallization of PVDF in the blend matrix. Raman analysis showed that the modified BaTiO3 particles, due to higher specific surfaces, induce, predominantly, the crystallization of the electrically active beta-phase of PVDF, while the initial micron size particles induce the formation of the most common but non-polar alpha-crystal form. The introduction of activated particles reduces the overall crystallinity but slightly affects the crystallization and melting temperatures of the matrix. Dielectric spectroscopy revealed that at fixed filler content the dielectric constant of the blend increases with decreasing of the particle size (increasing of the activation time). A similar trend was observed for the storage moduli in dynamic mechanical analysis; the stiffness of the composite was higher when mechanically activated particles were used. (C) 2014 AIP Publishing LLC.
T2  - Journal of Applied Physics
T1  - Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler
VL  - 115
IS  - 8
DO  - 10.1063/1.4866694
ER  - 

@article{
author = "Mofokeng, Tladi G. and Luyt, Adriaan S. and Pavlović, Vera P. and Pavlović, Vladimir B. and Dudić, Duško and Vlahović, Branislav and Đoković, Vladimir",
year = "2014",
abstract = "Nanocomposites of polyvinylidene fluoride/polymethyl methacrylate (PVDF/PMMA) blend and mechanically activated barium titanate (BaTiO3) particles were prepared by melt mixing. Modification of filler by means of mechanical activation has a profound effect on the crystallization of PVDF in the blend matrix. Raman analysis showed that the modified BaTiO3 particles, due to higher specific surfaces, induce, predominantly, the crystallization of the electrically active beta-phase of PVDF, while the initial micron size particles induce the formation of the most common but non-polar alpha-crystal form. The introduction of activated particles reduces the overall crystallinity but slightly affects the crystallization and melting temperatures of the matrix. Dielectric spectroscopy revealed that at fixed filler content the dielectric constant of the blend increases with decreasing of the particle size (increasing of the activation time). A similar trend was observed for the storage moduli in dynamic mechanical analysis; the stiffness of the composite was higher when mechanically activated particles were used. (C) 2014 AIP Publishing LLC.",
journal = "Journal of Applied Physics",
title = "Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler",
volume = "115",
number = "8",
doi = "10.1063/1.4866694"
}

Mofokeng, T. G., Luyt, A. S., Pavlović, V. P., Pavlović, V. B., Dudić, D., Vlahović, B.,& Đoković, V.. (2014). Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler. in Journal of Applied Physics, 115(8).
https://doi.org/10.1063/1.4866694

Mofokeng TG, Luyt AS, Pavlović VP, Pavlović VB, Dudić D, Vlahović B, Đoković V. Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler. in Journal of Applied Physics. 2014;115(8).
doi:10.1063/1.4866694 .

Mofokeng, Tladi G., Luyt, Adriaan S., Pavlović, Vera P., Pavlović, Vladimir B., Dudić, Duško, Vlahović, Branislav, Đoković, Vladimir, "Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler" in Journal of Applied Physics, 115, no. 8 (2014),
https://doi.org/10.1063/1.4866694 . .

TY  - JOUR
AU  - Simonovic, Kosta
AU  - Petronijević, Ivan M.
AU  - Kostoski, Dušan
AU  - Dojčilović, Jablan R.
AU  - Luyt, Adriaan S.
AU  - Dudić, Duško
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/147
AB  - The surface dielectric properties of acid-etched low-density polyethylene (LDPE) were analysed in the frequency range from 20 Hz to 200 kHz. Samples were treated with various acids for a period of one hour, at temperatures ranging from 20 to 70 degrees C. After the treatment, the samples were analysed with Fourier transform infrared spectroscopy, revealing chemical and crystallinity changes on the surface, as a direct result of the treatment. The sample surfaces were analysed using atomic force microscopy. The micrographs show that the acid treatment increases the roughness of the samples. Compared to untreated LDPE, the etched samples may exhibit significantly different conductance values at low frequencies. It is also observed that an increase in the acid treatment temperature can result in lower values of conductance and susceptance compared to untreated samples. LDPE films with low value of surface AC conductivity after acid treatment are potentially useful substrates for high-speed electro-sensing applications. The presented results indicate that a suitable choice of acid treatment of LDPE can effect surface polarization while preserving low values of surface AC conductivity of the polymer. (c) 2014 Society of Chemical Industry
T2  - Polymer International
T1  - Effects of acid treatment at different temperatures on the surface dielectric properties of low-density polyethylene
VL  - 63
IS  - 11
SP  - 1924
EP  - 1929
DO  - 10.1002/pi.4731
ER  - 

@article{
author = "Simonovic, Kosta and Petronijević, Ivan M. and Kostoski, Dušan and Dojčilović, Jablan R. and Luyt, Adriaan S. and Dudić, Duško",
year = "2014",
abstract = "The surface dielectric properties of acid-etched low-density polyethylene (LDPE) were analysed in the frequency range from 20 Hz to 200 kHz. Samples were treated with various acids for a period of one hour, at temperatures ranging from 20 to 70 degrees C. After the treatment, the samples were analysed with Fourier transform infrared spectroscopy, revealing chemical and crystallinity changes on the surface, as a direct result of the treatment. The sample surfaces were analysed using atomic force microscopy. The micrographs show that the acid treatment increases the roughness of the samples. Compared to untreated LDPE, the etched samples may exhibit significantly different conductance values at low frequencies. It is also observed that an increase in the acid treatment temperature can result in lower values of conductance and susceptance compared to untreated samples. LDPE films with low value of surface AC conductivity after acid treatment are potentially useful substrates for high-speed electro-sensing applications. The presented results indicate that a suitable choice of acid treatment of LDPE can effect surface polarization while preserving low values of surface AC conductivity of the polymer. (c) 2014 Society of Chemical Industry",
journal = "Polymer International",
title = "Effects of acid treatment at different temperatures on the surface dielectric properties of low-density polyethylene",
volume = "63",
number = "11",
pages = "1924-1929",
doi = "10.1002/pi.4731"
}

Simonovic, K., Petronijević, I. M., Kostoski, D., Dojčilović, J. R., Luyt, A. S.,& Dudić, D.. (2014). Effects of acid treatment at different temperatures on the surface dielectric properties of low-density polyethylene. in Polymer International, 63(11), 1924-1929.
https://doi.org/10.1002/pi.4731

Simonovic K, Petronijević IM, Kostoski D, Dojčilović JR, Luyt AS, Dudić D. Effects of acid treatment at different temperatures on the surface dielectric properties of low-density polyethylene. in Polymer International. 2014;63(11):1924-1929.
doi:10.1002/pi.4731 .

Simonovic, Kosta, Petronijević, Ivan M., Kostoski, Dušan, Dojčilović, Jablan R., Luyt, Adriaan S., Dudić, Duško, "Effects of acid treatment at different temperatures on the surface dielectric properties of low-density polyethylene" in Polymer International, 63, no. 11 (2014):1924-1929,
https://doi.org/10.1002/pi.4731 . .

TY  - JOUR
AU  - Petronijević, Ivan M.
AU  - Simonovic, K.
AU  - Marinković, Filip S.
AU  - Dojčilović, Jablan R.
AU  - Luyt, Adriaan S.
AU  - Dudić, Duško
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/120
AB  - This study describes the possibility of dielectric characterization of the initial stages of ageing in an low-density polyethylene (LDPE) + graphite composite, which is not possible using the standard method of dielectric spectroscopy. It is shown that the differences between the delay angles, Delta phi = phi(TRI)-phi(SIN), obtained using triangular and sinusoidal excitations on the composite samples, shows a maximum, and at the same time the position of this maximum shows more sensitivity to changes in the electrical properties of the material caused by ageing than other dielectric parameters. In order to clarify the applied methodology, a comparative analysis of the dielectric properties of other polymers poly(vinyl chloride) (PVC) and poly(vinyl alcohol) (PVA) and a conductive polymer composite (LDPE + carbon black) with respect to the application of sinusoidal and triangular electrical signals was carried out. Based on the presented results, we believe that the position of the peak in the frequency spectra of the difference between the delay angles obtained by using triangular and sinusoidal signals may be a suitable parameter for the dielectric characterization of polymeric materials.
T2  - Express Polymer Letters
T1  - The detection of the early stages of ageing in an LDPE plus graphite composite by comparison of dielectric responses induced by sinusoidal and triangular signals
VL  - 8
IS  - 10
SP  - 733
EP  - 744
DO  - 10.3144/expresspolymlett.2014.76
ER  - 

@article{
author = "Petronijević, Ivan M. and Simonovic, K. and Marinković, Filip S. and Dojčilović, Jablan R. and Luyt, Adriaan S. and Dudić, Duško",
year = "2014",
abstract = "This study describes the possibility of dielectric characterization of the initial stages of ageing in an low-density polyethylene (LDPE) + graphite composite, which is not possible using the standard method of dielectric spectroscopy. It is shown that the differences between the delay angles, Delta phi = phi(TRI)-phi(SIN), obtained using triangular and sinusoidal excitations on the composite samples, shows a maximum, and at the same time the position of this maximum shows more sensitivity to changes in the electrical properties of the material caused by ageing than other dielectric parameters. In order to clarify the applied methodology, a comparative analysis of the dielectric properties of other polymers poly(vinyl chloride) (PVC) and poly(vinyl alcohol) (PVA) and a conductive polymer composite (LDPE + carbon black) with respect to the application of sinusoidal and triangular electrical signals was carried out. Based on the presented results, we believe that the position of the peak in the frequency spectra of the difference between the delay angles obtained by using triangular and sinusoidal signals may be a suitable parameter for the dielectric characterization of polymeric materials.",
journal = "Express Polymer Letters",
title = "The detection of the early stages of ageing in an LDPE plus graphite composite by comparison of dielectric responses induced by sinusoidal and triangular signals",
volume = "8",
number = "10",
pages = "733-744",
doi = "10.3144/expresspolymlett.2014.76"
}

Petronijević, I. M., Simonovic, K., Marinković, F. S., Dojčilović, J. R., Luyt, A. S.,& Dudić, D.. (2014). The detection of the early stages of ageing in an LDPE plus graphite composite by comparison of dielectric responses induced by sinusoidal and triangular signals. in Express Polymer Letters, 8(10), 733-744.
https://doi.org/10.3144/expresspolymlett.2014.76

Petronijević IM, Simonovic K, Marinković FS, Dojčilović JR, Luyt AS, Dudić D. The detection of the early stages of ageing in an LDPE plus graphite composite by comparison of dielectric responses induced by sinusoidal and triangular signals. in Express Polymer Letters. 2014;8(10):733-744.
doi:10.3144/expresspolymlett.2014.76 .

Petronijević, Ivan M., Simonovic, K., Marinković, Filip S., Dojčilović, Jablan R., Luyt, Adriaan S., Dudić, Duško, "The detection of the early stages of ageing in an LDPE plus graphite composite by comparison of dielectric responses induced by sinusoidal and triangular signals" in Express Polymer Letters, 8, no. 10 (2014):733-744,
https://doi.org/10.3144/expresspolymlett.2014.76 . .

TY  - JOUR
AU  - Jović, Nataša G.
AU  - Dudić, Duško
AU  - Montone, A.
AU  - Antisari, M. Vittori
AU  - Mitrić, Miodrag
AU  - Đoković, Vladimir
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3427
AB  - The electrical conductivity of composites obtained by mixing epoxy resin and expanded graphite (EG) nanosheets has been investigated. Conductivity changes of up to I I orders of magnitude were observed as the filler load increased from 0 to 8 wt.%, while the percolation threshold was around 3 wt.%. It was also shown that epoxy/EG composites with intermediate filler contents exhibit a phase transition from predominantly contact conductivity to tunneling conductivity during heating from room temperature to 120 degrees C. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
T2  - Scripta Materialia
T1  - Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites
VL  - 58
IS  - 10
SP  - 846
EP  - 849
DO  - 10.1016/j.scriptamat.2007.12.041
ER  - 

@article{
author = "Jović, Nataša G. and Dudić, Duško and Montone, A. and Antisari, M. Vittori and Mitrić, Miodrag and Đoković, Vladimir",
year = "2008",
abstract = "The electrical conductivity of composites obtained by mixing epoxy resin and expanded graphite (EG) nanosheets has been investigated. Conductivity changes of up to I I orders of magnitude were observed as the filler load increased from 0 to 8 wt.%, while the percolation threshold was around 3 wt.%. It was also shown that epoxy/EG composites with intermediate filler contents exhibit a phase transition from predominantly contact conductivity to tunneling conductivity during heating from room temperature to 120 degrees C. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",
journal = "Scripta Materialia",
title = "Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites",
volume = "58",
number = "10",
pages = "846-849",
doi = "10.1016/j.scriptamat.2007.12.041"
}

Jović, N. G., Dudić, D., Montone, A., Antisari, M. V., Mitrić, M.,& Đoković, V.. (2008). Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites. in Scripta Materialia, 58(10), 846-849.
https://doi.org/10.1016/j.scriptamat.2007.12.041

Jović NG, Dudić D, Montone A, Antisari MV, Mitrić M, Đoković V. Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites. in Scripta Materialia. 2008;58(10):846-849.
doi:10.1016/j.scriptamat.2007.12.041 .

Jović, Nataša G., Dudić, Duško, Montone, A., Antisari, M. Vittori, Mitrić, Miodrag, Đoković, Vladimir, "Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites" in Scripta Materialia, 58, no. 10 (2008):846-849,
https://doi.org/10.1016/j.scriptamat.2007.12.041 . .

TY  - JOUR
AU  - Dudić, Duško
AU  - Marinović-Cincović, Milena
AU  - Nedeljković, Jovan
AU  - Đoković, Vladimir
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3519
AB  - Electrical properties of pure epoxy and epoxy-hematite nanorod composites have been investigated. The nanorods were synthesized by the forced hydrolysis method and further mixed with epoxy to obtain the nanocomposite. TEM analysis revealed that they have an average diameter of about 8 nm, with an average aspect ratio of 25. DC-conductivity and DC-current relaxation measurements showed a significant influence of Fe(2)O(3) nanorods on the DC-electrical properties of the epoxy matrix. However, the observed effects of the filler below and above the glass transition are different. Because of their high specific surfaces, nanorods affected segmental mobility of epoxy molecules to a large extent, which resulted in an increase in the glass transition temperature (T(g)) and a decrease in the real part of dielectric permittivity in high frequency/low temperature region. It is further observed that at elevated temperatures (above T(g)) and low frequencies the real part of dielectric permittivity of the nanocomposite exceeds that of the pure matrix, i.e. there is a transition towards microcomposite-like dielectric behaviour. (C) 2008 Elsevier Ltd. All rights reserved.
T2  - Polymer
T1  - Electrical properties of a composite comprising epoxy resin and alpha-hematite nanorods
VL  - 49
IS  - 18
SP  - 4000
EP  - 4008
DO  - 10.1016/j.polymer.2008.07.016
ER  - 

@article{
author = "Dudić, Duško and Marinović-Cincović, Milena and Nedeljković, Jovan and Đoković, Vladimir",
year = "2008",
abstract = "Electrical properties of pure epoxy and epoxy-hematite nanorod composites have been investigated. The nanorods were synthesized by the forced hydrolysis method and further mixed with epoxy to obtain the nanocomposite. TEM analysis revealed that they have an average diameter of about 8 nm, with an average aspect ratio of 25. DC-conductivity and DC-current relaxation measurements showed a significant influence of Fe(2)O(3) nanorods on the DC-electrical properties of the epoxy matrix. However, the observed effects of the filler below and above the glass transition are different. Because of their high specific surfaces, nanorods affected segmental mobility of epoxy molecules to a large extent, which resulted in an increase in the glass transition temperature (T(g)) and a decrease in the real part of dielectric permittivity in high frequency/low temperature region. It is further observed that at elevated temperatures (above T(g)) and low frequencies the real part of dielectric permittivity of the nanocomposite exceeds that of the pure matrix, i.e. there is a transition towards microcomposite-like dielectric behaviour. (C) 2008 Elsevier Ltd. All rights reserved.",
journal = "Polymer",
title = "Electrical properties of a composite comprising epoxy resin and alpha-hematite nanorods",
volume = "49",
number = "18",
pages = "4000-4008",
doi = "10.1016/j.polymer.2008.07.016"
}

Dudić, D., Marinović-Cincović, M., Nedeljković, J.,& Đoković, V.. (2008). Electrical properties of a composite comprising epoxy resin and alpha-hematite nanorods. in Polymer, 49(18), 4000-4008.
https://doi.org/10.1016/j.polymer.2008.07.016

Dudić D, Marinović-Cincović M, Nedeljković J, Đoković V. Electrical properties of a composite comprising epoxy resin and alpha-hematite nanorods. in Polymer. 2008;49(18):4000-4008.
doi:10.1016/j.polymer.2008.07.016 .

Dudić, Duško, Marinović-Cincović, Milena, Nedeljković, Jovan, Đoković, Vladimir, "Electrical properties of a composite comprising epoxy resin and alpha-hematite nanorods" in Polymer, 49, no. 18 (2008):4000-4008,
https://doi.org/10.1016/j.polymer.2008.07.016 . .

TY  - JOUR
AU  - Dudić, Duško
AU  - Đoković, Vladimir
AU  - Kostoski, Dušan
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2796
AB  - The secondary crystallization of aged isotactic polypropylene (iPP) of different morphologies, which occurs during annealing in the vicinity of the melting temperature (140 degreesC), was studied using differential scanning calorimetry (DSC) and density measurements. The results of calorimetric and density measurements were correlated. Kinetics of the high temperature secondary crystallization (HTSC) was studied by using Avrami relations. Avrami exponents, obtained according to the increase in crystallinity after annealing at 140 degreesC, were considered as the measure of the ability of iPP to crystallize secondarily. Depending on the initial morphology of the samples, accelerated ageing influences in different ways the ability of iPP to subsequently crystallize upon annealing. The aged samples with larger amorphous content show a reduced secondary crystallization at high temperature compared with the unaged samples. On the other hand, aging of medium crystalline samples leads to more pronounced HTSC. (C) 2004 Elsevier Ltd. All rights reserved.
T2  - Polymer Testing
T1  - The high temperature secondary crystallisation of aged isotactic polypropylene
VL  - 23
IS  - 6
SP  - 621
EP  - 627
DO  - 10.1016/j.polymertesting.2004.01.015
ER  - 

@article{
author = "Dudić, Duško and Đoković, Vladimir and Kostoski, Dušan",
year = "2004",
abstract = "The secondary crystallization of aged isotactic polypropylene (iPP) of different morphologies, which occurs during annealing in the vicinity of the melting temperature (140 degreesC), was studied using differential scanning calorimetry (DSC) and density measurements. The results of calorimetric and density measurements were correlated. Kinetics of the high temperature secondary crystallization (HTSC) was studied by using Avrami relations. Avrami exponents, obtained according to the increase in crystallinity after annealing at 140 degreesC, were considered as the measure of the ability of iPP to crystallize secondarily. Depending on the initial morphology of the samples, accelerated ageing influences in different ways the ability of iPP to subsequently crystallize upon annealing. The aged samples with larger amorphous content show a reduced secondary crystallization at high temperature compared with the unaged samples. On the other hand, aging of medium crystalline samples leads to more pronounced HTSC. (C) 2004 Elsevier Ltd. All rights reserved.",
journal = "Polymer Testing",
title = "The high temperature secondary crystallisation of aged isotactic polypropylene",
volume = "23",
number = "6",
pages = "621-627",
doi = "10.1016/j.polymertesting.2004.01.015"
}

Dudić, D., Đoković, V.,& Kostoski, D.. (2004). The high temperature secondary crystallisation of aged isotactic polypropylene. in Polymer Testing, 23(6), 621-627.
https://doi.org/10.1016/j.polymertesting.2004.01.015

Dudić D, Đoković V, Kostoski D. The high temperature secondary crystallisation of aged isotactic polypropylene. in Polymer Testing. 2004;23(6):621-627.
doi:10.1016/j.polymertesting.2004.01.015 .

Dudić, Duško, Đoković, Vladimir, Kostoski, Dušan, "The high temperature secondary crystallisation of aged isotactic polypropylene" in Polymer Testing, 23, no. 6 (2004):621-627,
https://doi.org/10.1016/j.polymertesting.2004.01.015 . .

TY  - JOUR
AU  - Dudić, Duško
AU  - Kostoski, Dušan
AU  - Đoković, Vladimir
AU  - Dramićanin, Miroslav
PY  - 2002
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2499
AB  - The process of low-melting point (LMP) alpha-phase formation in a quenched and annealed isotactic polypropylene (iPP) was studied by means of differential scanning calorimetry. The influence of preparation conditions (quenching and annealing temperatures, annealing times and sample thickness), together with the measurement parameters (heating and cooling rates), on the iPP melting behaviour are analysed. The results reveal a constant yield of LMP crystals over a wide range of quenching temperatures. This study also suggests that the LMP alpha-crystals originate from the crystallization of polymer portions, which are somewhere between the amorphous and the smectic phase on the macromolecular scale of order. (C) 2001 Society of Chemical Industry.
T2  - Polymer International
T1  - Formation and behaviour of low-temperature melting peak of quenched and annealed isotactic polypropylene
VL  - 51
IS  - 2
SP  - 111
EP  - 116
DO  - 10.1002/pi.803
ER  - 

@article{
author = "Dudić, Duško and Kostoski, Dušan and Đoković, Vladimir and Dramićanin, Miroslav",
year = "2002",
abstract = "The process of low-melting point (LMP) alpha-phase formation in a quenched and annealed isotactic polypropylene (iPP) was studied by means of differential scanning calorimetry. The influence of preparation conditions (quenching and annealing temperatures, annealing times and sample thickness), together with the measurement parameters (heating and cooling rates), on the iPP melting behaviour are analysed. The results reveal a constant yield of LMP crystals over a wide range of quenching temperatures. This study also suggests that the LMP alpha-crystals originate from the crystallization of polymer portions, which are somewhere between the amorphous and the smectic phase on the macromolecular scale of order. (C) 2001 Society of Chemical Industry.",
journal = "Polymer International",
title = "Formation and behaviour of low-temperature melting peak of quenched and annealed isotactic polypropylene",
volume = "51",
number = "2",
pages = "111-116",
doi = "10.1002/pi.803"
}

Dudić, D., Kostoski, D., Đoković, V.,& Dramićanin, M.. (2002). Formation and behaviour of low-temperature melting peak of quenched and annealed isotactic polypropylene. in Polymer International, 51(2), 111-116.
https://doi.org/10.1002/pi.803

Dudić D, Kostoski D, Đoković V, Dramićanin M. Formation and behaviour of low-temperature melting peak of quenched and annealed isotactic polypropylene. in Polymer International. 2002;51(2):111-116.
doi:10.1002/pi.803 .

Dudić, Duško, Kostoski, Dušan, Đoković, Vladimir, Dramićanin, Miroslav, "Formation and behaviour of low-temperature melting peak of quenched and annealed isotactic polypropylene" in Polymer International, 51, no. 2 (2002):111-116,
https://doi.org/10.1002/pi.803 . .

TY  - JOUR
AU  - Đoković, Vladimir
AU  - Dramićanin, Miroslav
AU  - Kostoski, Dušan
AU  - Dudić, Duško
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6308
AB  - Stress relaxation at room and elevated temperatures of high density (HDPE) and linear low-density polyethylene (LLDPE) has been investigated. Viscoelastic parameters (elasticity moduli and viscosity coefficients) of amorphous and crystal fraction at temperatures 18, 40, 60, 80 and 100 degreesC are determined by using two-process model for stress relaxation of polyethylene. The results show that amorphous viscosities of both polyethylene types clearly satisfy the Arrhenius dependence on temperature. Therefore, in the amorphous fraction of examined polyethylenes at elevated temperatures, there is a process with temperature independent activation energy. The estimated activation energies DeltaH approximate to 62.5 kJ/mol for LLDPE and DeltaH approximate to 59 kJ/mol for HDPE of that process are compared with activation energies determined from the time temperature superposition of experimental relaxation curves and with literature data.
T2  - Materials Science Forum
T1  - Viscoelastic properties of polyethylene at elevated temperatures on the basis of two-process model for stress relaxation
VL  - 352
SP  - 195
EP  - 200
DO  - 10.4028/www.scientific.net/MSF.352.195
ER  - 

@article{
author = "Đoković, Vladimir and Dramićanin, Miroslav and Kostoski, Dušan and Dudić, Duško",
year = "2000",
abstract = "Stress relaxation at room and elevated temperatures of high density (HDPE) and linear low-density polyethylene (LLDPE) has been investigated. Viscoelastic parameters (elasticity moduli and viscosity coefficients) of amorphous and crystal fraction at temperatures 18, 40, 60, 80 and 100 degreesC are determined by using two-process model for stress relaxation of polyethylene. The results show that amorphous viscosities of both polyethylene types clearly satisfy the Arrhenius dependence on temperature. Therefore, in the amorphous fraction of examined polyethylenes at elevated temperatures, there is a process with temperature independent activation energy. The estimated activation energies DeltaH approximate to 62.5 kJ/mol for LLDPE and DeltaH approximate to 59 kJ/mol for HDPE of that process are compared with activation energies determined from the time temperature superposition of experimental relaxation curves and with literature data.",
journal = "Materials Science Forum",
title = "Viscoelastic properties of polyethylene at elevated temperatures on the basis of two-process model for stress relaxation",
volume = "352",
pages = "195-200",
doi = "10.4028/www.scientific.net/MSF.352.195"
}

Đoković, V., Dramićanin, M., Kostoski, D.,& Dudić, D.. (2000). Viscoelastic properties of polyethylene at elevated temperatures on the basis of two-process model for stress relaxation. in Materials Science Forum, 352, 195-200.
https://doi.org/10.4028/www.scientific.net/MSF.352.195

Đoković V, Dramićanin M, Kostoski D, Dudić D. Viscoelastic properties of polyethylene at elevated temperatures on the basis of two-process model for stress relaxation. in Materials Science Forum. 2000;352:195-200.
doi:10.4028/www.scientific.net/MSF.352.195 .

Đoković, Vladimir, Dramićanin, Miroslav, Kostoski, Dušan, Dudić, Duško, "Viscoelastic properties of polyethylene at elevated temperatures on the basis of two-process model for stress relaxation" in Materials Science Forum, 352 (2000):195-200,
https://doi.org/10.4028/www.scientific.net/MSF.352.195 . .