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

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

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

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

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

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Trifunovic, S.
AU  - Dojčilović, Jablan R.
AU  - Ignjatović, Nenad L.
AU  - Suljovrujić, Edin H.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4096
AB  - The influence of gamma radiation on the molecular weight and glass transition behaviour of poly-L-lactide (PLLA) and hydroxyapatite/poly-L-lactide (HAp/PLLA) nanocomposite has been studied Since PLLA exposed to high-energy radiation in the presence of air is prone to chain scission reactions and large degradation, changes in molecular weight were obtained by gel permeation chromatography (GPC). Alterations in the glass transition behaviour were investigated by differential scanning calorimetry (DSC) The apparent activation energy (Delta H*) for glass transition was determined on the basis of the heating rate dependence of the glass transition temperature (T-g). Our findings support the fact that chain scission is the main reason for the decrease of T-g and Delta H* with the absorbed dose Furthermore, more intensive chain scission degradation of PLLA was observed in HAp/PLLA and can only be ascribed to the presence of HAp nanoparticles. Consequently, initial differences in the glass transition temperature and/or apparent activation energy of PLLA and HAp/PLLA became more pronounced with absorbed dose. This study reveals that radiation-induced changes in molecular weight and glass transition temperature occur in a predictable and fairly accurate manner Therefore, gamma radiation can be used not only for sterilization but also for tailoring desirable end-use properties of these biomaterials (C) 2010 Elsevier B V. All rights reserved
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - The influence of gamma radiation on the molecular weight and glass transition of PLLA and HAp/PLLA nanocomposite
VL  - 268
IS  - 17-18
SP  - 2744
EP  - 2749
DO  - 10.1016/j.nimb.2010.06.036
ER  - 

@article{
author = "Miličević, Dejan S. and Trifunovic, S. and Dojčilović, Jablan R. and Ignjatović, Nenad L. and Suljovrujić, Edin H.",
year = "2010",
abstract = "The influence of gamma radiation on the molecular weight and glass transition behaviour of poly-L-lactide (PLLA) and hydroxyapatite/poly-L-lactide (HAp/PLLA) nanocomposite has been studied Since PLLA exposed to high-energy radiation in the presence of air is prone to chain scission reactions and large degradation, changes in molecular weight were obtained by gel permeation chromatography (GPC). Alterations in the glass transition behaviour were investigated by differential scanning calorimetry (DSC) The apparent activation energy (Delta H*) for glass transition was determined on the basis of the heating rate dependence of the glass transition temperature (T-g). Our findings support the fact that chain scission is the main reason for the decrease of T-g and Delta H* with the absorbed dose Furthermore, more intensive chain scission degradation of PLLA was observed in HAp/PLLA and can only be ascribed to the presence of HAp nanoparticles. Consequently, initial differences in the glass transition temperature and/or apparent activation energy of PLLA and HAp/PLLA became more pronounced with absorbed dose. This study reveals that radiation-induced changes in molecular weight and glass transition temperature occur in a predictable and fairly accurate manner Therefore, gamma radiation can be used not only for sterilization but also for tailoring desirable end-use properties of these biomaterials (C) 2010 Elsevier B V. All rights reserved",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "The influence of gamma radiation on the molecular weight and glass transition of PLLA and HAp/PLLA nanocomposite",
volume = "268",
number = "17-18",
pages = "2744-2749",
doi = "10.1016/j.nimb.2010.06.036"
}

Miličević, D. S., Trifunovic, S., Dojčilović, J. R., Ignjatović, N. L.,& Suljovrujić, E. H.. (2010). The influence of gamma radiation on the molecular weight and glass transition of PLLA and HAp/PLLA nanocomposite. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 268(17-18), 2744-2749.
https://doi.org/10.1016/j.nimb.2010.06.036

Miličević DS, Trifunovic S, Dojčilović JR, Ignjatović NL, Suljovrujić EH. The influence of gamma radiation on the molecular weight and glass transition of PLLA and HAp/PLLA nanocomposite. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2010;268(17-18):2744-2749.
doi:10.1016/j.nimb.2010.06.036 .

Miličević, Dejan S., Trifunovic, S., Dojčilović, Jablan R., Ignjatović, Nenad L., Suljovrujić, Edin H., "The influence of gamma radiation on the molecular weight and glass transition of PLLA and HAp/PLLA nanocomposite" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 268, no. 17-18 (2010):2744-2749,
https://doi.org/10.1016/j.nimb.2010.06.036 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Trifunovic, S.
AU  - Miličević, Dejan S.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3910
AB  - The high-temperature a relaxation in gamma irradiated isotactic polypropylene (iPP) was studied over the temperature (298-406 K), frequency (10(3)-10(6) Hz) and absorbed dose (0-700 kGy) ranges by means of dielectric spectroscopy. The multiple a relaxation was resolved from the 0 relaxation by curve fitting and its parameters were determined. Its position, intensity and activation energy were found to be strongly dependent on the changes in the structural and morphological parameters attributed to the exposure of the samples to radiation. Wide angle X-ray diffraction (WAXD) was used to investigate radiation-induced changes in the crystalline structure and degree of crystallinity, since this relaxation is connected with the crystal phase. Infrared (IR) spectroscopy and gel measurements were used to determine the changes in the oxidative degradation and the degree of network formation, respectively; the polar (carbonyl and/or hydroperoxide) groups that were introduced by irradiation were considered as tracer groups. Conclusions derived according to different methods were compared. The results reveal uncommon a relaxation behaviour with gamma radiation and confirm the multiple nature of this process, together with high dielectric and/or relaxation sensitivity of iPP to the radiation-induced changes. (C) 2009 Elsevier Ltd. All rights reserved.
T2  - Polymer Degradation and Stability
T1  - The influence of gamma radiation on the dielectric relaxation behaviour of isotactic polypropylene: The alpha relaxation
VL  - 95
IS  - 2
SP  - 164
EP  - 171
DO  - 10.1016/j.polymdegradstab.2009.11.034
ER  - 

@article{
author = "Suljovrujić, Edin H. and Trifunovic, S. and Miličević, Dejan S.",
year = "2010",
abstract = "The high-temperature a relaxation in gamma irradiated isotactic polypropylene (iPP) was studied over the temperature (298-406 K), frequency (10(3)-10(6) Hz) and absorbed dose (0-700 kGy) ranges by means of dielectric spectroscopy. The multiple a relaxation was resolved from the 0 relaxation by curve fitting and its parameters were determined. Its position, intensity and activation energy were found to be strongly dependent on the changes in the structural and morphological parameters attributed to the exposure of the samples to radiation. Wide angle X-ray diffraction (WAXD) was used to investigate radiation-induced changes in the crystalline structure and degree of crystallinity, since this relaxation is connected with the crystal phase. Infrared (IR) spectroscopy and gel measurements were used to determine the changes in the oxidative degradation and the degree of network formation, respectively; the polar (carbonyl and/or hydroperoxide) groups that were introduced by irradiation were considered as tracer groups. Conclusions derived according to different methods were compared. The results reveal uncommon a relaxation behaviour with gamma radiation and confirm the multiple nature of this process, together with high dielectric and/or relaxation sensitivity of iPP to the radiation-induced changes. (C) 2009 Elsevier Ltd. All rights reserved.",
journal = "Polymer Degradation and Stability",
title = "The influence of gamma radiation on the dielectric relaxation behaviour of isotactic polypropylene: The alpha relaxation",
volume = "95",
number = "2",
pages = "164-171",
doi = "10.1016/j.polymdegradstab.2009.11.034"
}

Suljovrujić, E. H., Trifunovic, S.,& Miličević, D. S.. (2010). The influence of gamma radiation on the dielectric relaxation behaviour of isotactic polypropylene: The alpha relaxation. in Polymer Degradation and Stability, 95(2), 164-171.
https://doi.org/10.1016/j.polymdegradstab.2009.11.034

Suljovrujić EH, Trifunovic S, Miličević DS. The influence of gamma radiation on the dielectric relaxation behaviour of isotactic polypropylene: The alpha relaxation. in Polymer Degradation and Stability. 2010;95(2):164-171.
doi:10.1016/j.polymdegradstab.2009.11.034 .

Suljovrujić, Edin H., Trifunovic, S., Miličević, Dejan S., "The influence of gamma radiation on the dielectric relaxation behaviour of isotactic polypropylene: The alpha relaxation" in Polymer Degradation and Stability, 95, no. 2 (2010):164-171,
https://doi.org/10.1016/j.polymdegradstab.2009.11.034 . .

TY  - JOUR
AU  - Cvijović, Mirjana R.
AU  - Golobočanin, Dušan D.
AU  - Trifunovic, S.
AU  - Miljević, Nada R.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3253
AB  - Water quality from three conventional river water treatment plants (Zlatibor, Rzav and Cerovica brdo) using aluminum sulphate (alum)as coagulant in the region of Uzice was investigated in the period 2005-2006. The concentrations of aluminium (Al) in studied samples (drinking water, river and soil) were determined by inductively coupled plasma optical emission (ICP-OES) spectrometry and validated by atomic absorption spectrometry (AAS) and DC-Arc plasma. Similar results were obtained by employed analytical methods. The total residual aluminum concentrations were in the range of 0.02 to 0.26 mg AN controlled by pH at investigated treatment plants. Concentrations of residual aluminium exceeding the public health goal standards were recorded in spring (March, April) during snow-melt episodes in this area. The discharge water after breed treatment with alum coagulant into the stream rivers did not cause any changes of the natural equilibrium of this ecosystem as well as indirectly the category of these rivers downstreams.
T2  - Journal of Environmental Protection and Ecology
T1  - Alum-Treated Drinking Water in Western Serbia
VL  - 10
IS  - 3
SP  - 649
EP  - 656
UR  - https://hdl.handle.net/21.15107/rcub_vinar_3253
ER  - 

@article{
author = "Cvijović, Mirjana R. and Golobočanin, Dušan D. and Trifunovic, S. and Miljević, Nada R.",
year = "2009",
abstract = "Water quality from three conventional river water treatment plants (Zlatibor, Rzav and Cerovica brdo) using aluminum sulphate (alum)as coagulant in the region of Uzice was investigated in the period 2005-2006. The concentrations of aluminium (Al) in studied samples (drinking water, river and soil) were determined by inductively coupled plasma optical emission (ICP-OES) spectrometry and validated by atomic absorption spectrometry (AAS) and DC-Arc plasma. Similar results were obtained by employed analytical methods. The total residual aluminum concentrations were in the range of 0.02 to 0.26 mg AN controlled by pH at investigated treatment plants. Concentrations of residual aluminium exceeding the public health goal standards were recorded in spring (March, April) during snow-melt episodes in this area. The discharge water after breed treatment with alum coagulant into the stream rivers did not cause any changes of the natural equilibrium of this ecosystem as well as indirectly the category of these rivers downstreams.",
journal = "Journal of Environmental Protection and Ecology",
title = "Alum-Treated Drinking Water in Western Serbia",
volume = "10",
number = "3",
pages = "649-656",
url = "https://hdl.handle.net/21.15107/rcub_vinar_3253"
}

Cvijović, M. R., Golobočanin, D. D., Trifunovic, S.,& Miljević, N. R.. (2009). Alum-Treated Drinking Water in Western Serbia. in Journal of Environmental Protection and Ecology, 10(3), 649-656.
https://hdl.handle.net/21.15107/rcub_vinar_3253

Cvijović MR, Golobočanin DD, Trifunovic S, Miljević NR. Alum-Treated Drinking Water in Western Serbia. in Journal of Environmental Protection and Ecology. 2009;10(3):649-656.
https://hdl.handle.net/21.15107/rcub_vinar_3253 .

Cvijović, Mirjana R., Golobočanin, Dušan D., Trifunovic, S., Miljević, Nada R., "Alum-Treated Drinking Water in Western Serbia" in Journal of Environmental Protection and Ecology, 10, no. 3 (2009):649-656,
https://hdl.handle.net/21.15107/rcub_vinar_3253 .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Trifunovic, S.
AU  - Ignjatović, Nenad L.
AU  - Suljovrujić, Edin H.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6697
AB  - Hydroxyapatite/poly L-lactide (HAp/PLLA) is a composite biomaterial which has been widely utilized for substitution and reparation of the hard bone tissue. It is well known that gamma irradiation has been successfully employed in the modification/sterilization of such porous composites and that it has advantages over other procedures. In this study, differential scanning calorimetry (DSC) measurements were made to investigate the influence of the radiation on glass transition behavior and structural relaxation, as well as to estimate the activation energy for this process. The apparent activation energy Delta H* for structural relaxation in the glass transition region was determined on the basis of the heating rate dependence of the glass transition temperature T-g. Furthermore, the results were correlated with those obtained by gel permeation chromatography (GPC). Our findings support the fact that the radiation-induced chain scission in the PLLA phase is the main reason for the decrease of the glass transition temperature and/or activation energy with the absorbed dose.
T2  - Materials Science Forum
T1  - The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite
VL  - 555
SP  - 497
EP  - 502
DO  - 10.4028/www.scientific.net/MSF.555.497
ER  - 

@article{
author = "Miličević, Dejan S. and Trifunovic, S. and Ignjatović, Nenad L. and Suljovrujić, Edin H.",
year = "2007",
abstract = "Hydroxyapatite/poly L-lactide (HAp/PLLA) is a composite biomaterial which has been widely utilized for substitution and reparation of the hard bone tissue. It is well known that gamma irradiation has been successfully employed in the modification/sterilization of such porous composites and that it has advantages over other procedures. In this study, differential scanning calorimetry (DSC) measurements were made to investigate the influence of the radiation on glass transition behavior and structural relaxation, as well as to estimate the activation energy for this process. The apparent activation energy Delta H* for structural relaxation in the glass transition region was determined on the basis of the heating rate dependence of the glass transition temperature T-g. Furthermore, the results were correlated with those obtained by gel permeation chromatography (GPC). Our findings support the fact that the radiation-induced chain scission in the PLLA phase is the main reason for the decrease of the glass transition temperature and/or activation energy with the absorbed dose.",
journal = "Materials Science Forum",
title = "The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite",
volume = "555",
pages = "497-502",
doi = "10.4028/www.scientific.net/MSF.555.497"
}

Miličević, D. S., Trifunovic, S., Ignjatović, N. L.,& Suljovrujić, E. H.. (2007). The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite. in Materials Science Forum, 555, 497-502.
https://doi.org/10.4028/www.scientific.net/MSF.555.497

Miličević DS, Trifunovic S, Ignjatović NL, Suljovrujić EH. The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite. in Materials Science Forum. 2007;555:497-502.
doi:10.4028/www.scientific.net/MSF.555.497 .

Miličević, Dejan S., Trifunovic, S., Ignjatović, Nenad L., Suljovrujić, Edin H., "The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite" in Materials Science Forum, 555 (2007):497-502,
https://doi.org/10.4028/www.scientific.net/MSF.555.497 . .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Trifunovic, S.
AU  - Galović, Slobodanka
AU  - Suljovrujić, Edin H.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6666
AB  - Structure, crystallization behaviour and some thermal properties of poly-L-lactide (PLLA), gamma irradiated up to 300 kGy, have been studied. Through differential scanning calorimetry measurements, radiation-induced changes were evident in the enthalpy of melting and cold crystallization, as well as in the degree of crystallinity. Decay of the glass transition, cold crystallization and melting temperatures with irradiation dose was observed in all cases. The annealing treatment, which can substantially reduce the concentration of free radicals, also had a great impact on thermal/crystallization behaviour of irradiated PLLA. Extensive chain scission, as a dominant effect of gamma irradiation, confirmed by gel permeation chromatography, has as a consequence a growth of new thin crystal lamellae and occurrence of the second low-temperature melting peak. Thermogravimetric analyses have shown that irradiation lowered the thermal stability of PLLA. (c) 2007 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - Thermal and crystallization behaviour of gamma irradiated PLLA
VL  - 76
IS  - 8-9
SP  - 1376
EP  - 1380
DO  - 10.1016/j.radphyschem.2007.02.035
ER  - 

@article{
author = "Miličević, Dejan S. and Trifunovic, S. and Galović, Slobodanka and Suljovrujić, Edin H.",
year = "2007",
abstract = "Structure, crystallization behaviour and some thermal properties of poly-L-lactide (PLLA), gamma irradiated up to 300 kGy, have been studied. Through differential scanning calorimetry measurements, radiation-induced changes were evident in the enthalpy of melting and cold crystallization, as well as in the degree of crystallinity. Decay of the glass transition, cold crystallization and melting temperatures with irradiation dose was observed in all cases. The annealing treatment, which can substantially reduce the concentration of free radicals, also had a great impact on thermal/crystallization behaviour of irradiated PLLA. Extensive chain scission, as a dominant effect of gamma irradiation, confirmed by gel permeation chromatography, has as a consequence a growth of new thin crystal lamellae and occurrence of the second low-temperature melting peak. Thermogravimetric analyses have shown that irradiation lowered the thermal stability of PLLA. (c) 2007 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "Thermal and crystallization behaviour of gamma irradiated PLLA",
volume = "76",
number = "8-9",
pages = "1376-1380",
doi = "10.1016/j.radphyschem.2007.02.035"
}

Miličević, D. S., Trifunovic, S., Galović, S.,& Suljovrujić, E. H.. (2007). Thermal and crystallization behaviour of gamma irradiated PLLA. in Radiation Physics and Chemistry, 76(8-9), 1376-1380.
https://doi.org/10.1016/j.radphyschem.2007.02.035

Miličević DS, Trifunovic S, Galović S, Suljovrujić EH. Thermal and crystallization behaviour of gamma irradiated PLLA. in Radiation Physics and Chemistry. 2007;76(8-9):1376-1380.
doi:10.1016/j.radphyschem.2007.02.035 .

Miličević, Dejan S., Trifunovic, S., Galović, Slobodanka, Suljovrujić, Edin H., "Thermal and crystallization behaviour of gamma irradiated PLLA" in Radiation Physics and Chemistry, 76, no. 8-9 (2007):1376-1380,
https://doi.org/10.1016/j.radphyschem.2007.02.035 . .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Trifunovic, S.
AU  - Popović, Milan
AU  - Milic, T. Vukašinović
AU  - Suljovrujić, Edin H.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3229
AB  - This paper studies the influence of orientation and structural peculiarities on the radiation-induced oxidation/crosslinking changes in different polyethylenes (PEs). For this reason, low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and high density polyethylene (HDPE) were oriented via solid-state stretching at an elevated temperature. Later on, oriented samples were gamma-irradiated in air to various absorbed doses (up to 700 kGy). In order to investigate orientation- and radiation-induced changes in morphology, surface microstructures were analyzed by optical (OM) and scanning electron microscopy (SEM). Differential scanning calorimetry (DSC), IR spectroscopy and gel measurements were used to determine changes in crystallinity, oxidative degradation and degree of network formation, respectively. Conclusions derived according to these methods were compared. The differences in morphology, crystallinity, oxidation and gel behavior are caused primarily by the structural peculiarities of different types of PEs, the heterogeneous nature of radiation effects in semicrystalline polymers and, in the case of oriented samples, by the molecular orientation as well. The presented results reveal complicate crosslinking behavior with orientation while increase/decrease in crystallinity/oxidation with draw ratio was clearly evident. (C) 2007 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - The influence of orientation on the radiation-induced crosslinking/oxidative behavior of different PEs
VL  - 260
IS  - 2
SP  - 603
EP  - 612
DO  - 10.1016/j.nimb.2007.04.157
ER  - 

@article{
author = "Miličević, Dejan S. and Trifunovic, S. and Popović, Milan and Milic, T. Vukašinović and Suljovrujić, Edin H.",
year = "2007",
abstract = "This paper studies the influence of orientation and structural peculiarities on the radiation-induced oxidation/crosslinking changes in different polyethylenes (PEs). For this reason, low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and high density polyethylene (HDPE) were oriented via solid-state stretching at an elevated temperature. Later on, oriented samples were gamma-irradiated in air to various absorbed doses (up to 700 kGy). In order to investigate orientation- and radiation-induced changes in morphology, surface microstructures were analyzed by optical (OM) and scanning electron microscopy (SEM). Differential scanning calorimetry (DSC), IR spectroscopy and gel measurements were used to determine changes in crystallinity, oxidative degradation and degree of network formation, respectively. Conclusions derived according to these methods were compared. The differences in morphology, crystallinity, oxidation and gel behavior are caused primarily by the structural peculiarities of different types of PEs, the heterogeneous nature of radiation effects in semicrystalline polymers and, in the case of oriented samples, by the molecular orientation as well. The presented results reveal complicate crosslinking behavior with orientation while increase/decrease in crystallinity/oxidation with draw ratio was clearly evident. (C) 2007 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "The influence of orientation on the radiation-induced crosslinking/oxidative behavior of different PEs",
volume = "260",
number = "2",
pages = "603-612",
doi = "10.1016/j.nimb.2007.04.157"
}

Miličević, D. S., Trifunovic, S., Popović, M., Milic, T. V.,& Suljovrujić, E. H.. (2007). The influence of orientation on the radiation-induced crosslinking/oxidative behavior of different PEs. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 260(2), 603-612.
https://doi.org/10.1016/j.nimb.2007.04.157

Miličević DS, Trifunovic S, Popović M, Milic TV, Suljovrujić EH. The influence of orientation on the radiation-induced crosslinking/oxidative behavior of different PEs. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2007;260(2):603-612.
doi:10.1016/j.nimb.2007.04.157 .

Miličević, Dejan S., Trifunovic, S., Popović, Milan, Milic, T. Vukašinović, Suljovrujić, Edin H., "The influence of orientation on the radiation-induced crosslinking/oxidative behavior of different PEs" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 260, no. 2 (2007):603-612,
https://doi.org/10.1016/j.nimb.2007.04.157 . .