TY  - JOUR
AU  - Maletić, Slavica
AU  - Jović Orsini, Nataša
AU  - Milić, Mirjana
AU  - Dojčilović, Jablan
AU  - Montone, Amelia
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11994
AB  - Epoxy-rich carbon-based composites are well recognized materials in industries owing to their good mechanical properties and thermal stability. Here, dielectric properties of composites based on bisphenol-A-epoxy resin loaded with 5, 6, 10, and 15 wt% of graphite flakes (GF) have been studied. The frequency and temperature dependence of the dielectric permittivity, dielectric loss, and ac conductivity have been examined in temperature (−103 to 97°C) and frequency (20 Hz–200 kHz) range. Influence of the filler surface chemistry have been studied for composites loaded with 5 wt% GF obtained: (i) under wet milling, without or with adding Triton-100x as a surfactant, or (ii) under dry milling in the presence of KOH. The composite made of epoxy loaded with 5 wt% exfoliated expanded graphite flakes (EEG), was also prepared. The surface treatment with KOH notably increased dielectric constant of the composite, keeping low dielectric loss, while treatment with Triton-100x significantly increased tanδ. The composite loaded with exfoliated expanded graphite shows higher ac conductivity than those obtained with flaky graphite, GF. Possibility to change dielectric properties of the composites without changing the loading content can be used as an approach in tailoring one with desired dielectric properties.
T2  - Journal of Applied Polymer Science
T1  - Dielectric properties of epoxy/graphite flakes composites: Influence of loading and surface treatment
VL  - 141
IS  - 5
SP  - e54881
DO  - 10.1002/app.54881
ER  - 

@article{
author = "Maletić, Slavica and Jović Orsini, Nataša and Milić, Mirjana and Dojčilović, Jablan and Montone, Amelia",
year = "2023",
abstract = "Epoxy-rich carbon-based composites are well recognized materials in industries owing to their good mechanical properties and thermal stability. Here, dielectric properties of composites based on bisphenol-A-epoxy resin loaded with 5, 6, 10, and 15 wt% of graphite flakes (GF) have been studied. The frequency and temperature dependence of the dielectric permittivity, dielectric loss, and ac conductivity have been examined in temperature (−103 to 97°C) and frequency (20 Hz–200 kHz) range. Influence of the filler surface chemistry have been studied for composites loaded with 5 wt% GF obtained: (i) under wet milling, without or with adding Triton-100x as a surfactant, or (ii) under dry milling in the presence of KOH. The composite made of epoxy loaded with 5 wt% exfoliated expanded graphite flakes (EEG), was also prepared. The surface treatment with KOH notably increased dielectric constant of the composite, keeping low dielectric loss, while treatment with Triton-100x significantly increased tanδ. The composite loaded with exfoliated expanded graphite shows higher ac conductivity than those obtained with flaky graphite, GF. Possibility to change dielectric properties of the composites without changing the loading content can be used as an approach in tailoring one with desired dielectric properties.",
journal = "Journal of Applied Polymer Science",
title = "Dielectric properties of epoxy/graphite flakes composites: Influence of loading and surface treatment",
volume = "141",
number = "5",
pages = "e54881",
doi = "10.1002/app.54881"
}

Maletić, S., Jović Orsini, N., Milić, M., Dojčilović, J.,& Montone, A.. (2023). Dielectric properties of epoxy/graphite flakes composites: Influence of loading and surface treatment. in Journal of Applied Polymer Science, 141(5), e54881.
https://doi.org/10.1002/app.54881

Maletić S, Jović Orsini N, Milić M, Dojčilović J, Montone A. Dielectric properties of epoxy/graphite flakes composites: Influence of loading and surface treatment. in Journal of Applied Polymer Science. 2023;141(5):e54881.
doi:10.1002/app.54881 .

Maletić, Slavica, Jović Orsini, Nataša, Milić, Mirjana, Dojčilović, Jablan, Montone, Amelia, "Dielectric properties of epoxy/graphite flakes composites: Influence of loading and surface treatment" in Journal of Applied Polymer Science, 141, no. 5 (2023):e54881,
https://doi.org/10.1002/app.54881 . .

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  - 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  - 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  - Pavlović, Vera P.
AU  - Krstić, Jugoslav B.
AU  - Šćepanović, Maja
AU  - Dojčilović, Jablan R.
AU  - Minić, Dragica M.
AU  - Blanuša, Jovan
AU  - Stevanović, Stojan
AU  - Mitić, Vojislav V.
AU  - Pavlović, Vladimir B.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4449
AB  - In this article, in order to obtain tetragonal nanocrystalline BaTiO3, structural investigations of mechanically activated BaTiO3 powder have been performed. A mercury porosimetry analysis and scanning electron microscopy method have been applied for determination of the specific pore volume, porosity and microstructure morphology of the samples. The lattice vibration spectra of nonactivated and activated powders, their phase composition, lattice microstrains and the mean size of coherently diffracting domains were examined by Raman spectroscopy and the X-ray powder diffraction method. The average crystal structure of obtained nanocrystalline powders, estimated from X-ray diffraction data, gave evidence of retained, but slightly sustained tetragonality of powders, even for particles as small as similar to 30 nm. Raman spectroscopy also gave clear evidence for local tetragonal symmetries, in particular through the presence of a band at similar to 307 cm(-1). (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
PB  - Elsevier
T2  - Ceramics International
T1  - Structural investigation of mechanically activated nanocrystalline BaTiO3 powders
VL  - 37
IS  - 7
SP  - 2513
EP  - 2518
DO  - 10.1016/j.ceramint.2011.03.064
ER  - 

@article{
author = "Pavlović, Vera P. and Krstić, Jugoslav B. and Šćepanović, Maja and Dojčilović, Jablan R. and Minić, Dragica M. and Blanuša, Jovan and Stevanović, Stojan and Mitić, Vojislav V. and Pavlović, Vladimir B.",
year = "2011",
abstract = "In this article, in order to obtain tetragonal nanocrystalline BaTiO3, structural investigations of mechanically activated BaTiO3 powder have been performed. A mercury porosimetry analysis and scanning electron microscopy method have been applied for determination of the specific pore volume, porosity and microstructure morphology of the samples. The lattice vibration spectra of nonactivated and activated powders, their phase composition, lattice microstrains and the mean size of coherently diffracting domains were examined by Raman spectroscopy and the X-ray powder diffraction method. The average crystal structure of obtained nanocrystalline powders, estimated from X-ray diffraction data, gave evidence of retained, but slightly sustained tetragonality of powders, even for particles as small as similar to 30 nm. Raman spectroscopy also gave clear evidence for local tetragonal symmetries, in particular through the presence of a band at similar to 307 cm(-1). (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Structural investigation of mechanically activated nanocrystalline BaTiO3 powders",
volume = "37",
number = "7",
pages = "2513-2518",
doi = "10.1016/j.ceramint.2011.03.064"
}

Pavlović, V. P., Krstić, J. B., Šćepanović, M., Dojčilović, J. R., Minić, D. M., Blanuša, J., Stevanović, S., Mitić, V. V.,& Pavlović, V. B.. (2011). Structural investigation of mechanically activated nanocrystalline BaTiO3 powders. in Ceramics International
Elsevier., 37(7), 2513-2518.
https://doi.org/10.1016/j.ceramint.2011.03.064

Pavlović VP, Krstić JB, Šćepanović M, Dojčilović JR, Minić DM, Blanuša J, Stevanović S, Mitić VV, Pavlović VB. Structural investigation of mechanically activated nanocrystalline BaTiO3 powders. in Ceramics International. 2011;37(7):2513-2518.
doi:10.1016/j.ceramint.2011.03.064 .

Pavlović, Vera P., Krstić, Jugoslav B., Šćepanović, Maja, Dojčilović, Jablan R., Minić, Dragica M., Blanuša, Jovan, Stevanović, Stojan, Mitić, Vojislav V., Pavlović, Vladimir B., "Structural investigation of mechanically activated nanocrystalline BaTiO3 powders" in Ceramics International, 37, no. 7 (2011):2513-2518,
https://doi.org/10.1016/j.ceramint.2011.03.064 . .

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

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

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

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

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

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  - Pavlović, Vera P.
AU  - Popovic, D.
AU  - Krstić, Jelena
AU  - Dojčilović, Jablan R.
AU  - Babić, Biljana M.
AU  - Pavlović, Vladimir B.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3823
AB  - The influence of mechanical activation in a planetary ball mill on the change of the structure of BaTiO3 powders has been investigated. The particle size distribution of the nonactivated and activated samples was measured by a particle dimension laser analyzer. The mercury porosimetry method has been applied for determination of the surface area of the samples, bulk density, specific pore volumes, total porosity and the pore size distributions. Formation of paramagnetic centers and the change of the IR active modes was investigated by EPR and IR measurements. Semi-quantitative comparison of the BaCO3 and OH- group presence in IR spectra was calculated. The investigation showed that mechanical activation of BaTiO3 has a pronounced influence on the change of the powder particles structure and enables establishing the directions of possible BaTiO3 ceramics materials properties prognosis according to the synthesis-structure correlation. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Influence of mechanical activation on the structure of ultrafine BaTiO3 powders
VL  - 486
IS  - 1-2
SP  - 633
EP  - 639
DO  - 10.1016/j.jallcom.2009.07.008
ER  - 

@article{
author = "Pavlović, Vera P. and Popovic, D. and Krstić, Jelena and Dojčilović, Jablan R. and Babić, Biljana M. and Pavlović, Vladimir B.",
year = "2009",
abstract = "The influence of mechanical activation in a planetary ball mill on the change of the structure of BaTiO3 powders has been investigated. The particle size distribution of the nonactivated and activated samples was measured by a particle dimension laser analyzer. The mercury porosimetry method has been applied for determination of the surface area of the samples, bulk density, specific pore volumes, total porosity and the pore size distributions. Formation of paramagnetic centers and the change of the IR active modes was investigated by EPR and IR measurements. Semi-quantitative comparison of the BaCO3 and OH- group presence in IR spectra was calculated. The investigation showed that mechanical activation of BaTiO3 has a pronounced influence on the change of the powder particles structure and enables establishing the directions of possible BaTiO3 ceramics materials properties prognosis according to the synthesis-structure correlation. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Influence of mechanical activation on the structure of ultrafine BaTiO3 powders",
volume = "486",
number = "1-2",
pages = "633-639",
doi = "10.1016/j.jallcom.2009.07.008"
}

Pavlović, V. P., Popovic, D., Krstić, J., Dojčilović, J. R., Babić, B. M.,& Pavlović, V. B.. (2009). Influence of mechanical activation on the structure of ultrafine BaTiO3 powders. in Journal of Alloys and Compounds, 486(1-2), 633-639.
https://doi.org/10.1016/j.jallcom.2009.07.008

Pavlović VP, Popovic D, Krstić J, Dojčilović JR, Babić BM, Pavlović VB. Influence of mechanical activation on the structure of ultrafine BaTiO3 powders. in Journal of Alloys and Compounds. 2009;486(1-2):633-639.
doi:10.1016/j.jallcom.2009.07.008 .

Pavlović, Vera P., Popovic, D., Krstić, Jelena, Dojčilović, Jablan R., Babić, Biljana M., Pavlović, Vladimir B., "Influence of mechanical activation on the structure of ultrafine BaTiO3 powders" in Journal of Alloys and Compounds, 486, no. 1-2 (2009):633-639,
https://doi.org/10.1016/j.jallcom.2009.07.008 . .

TY  - JOUR
AU  - Kostoski, Dušan
AU  - Dojčilović, Jablan R.
AU  - Novaković, L.
AU  - Suljovrujić, Edin H.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3039
AB  - The effects of gamma irradiation in air and accelerated aging of low-density polyethylene (LDPE) were studied through dielectric loss (tan 6) analysis in the temperature range from 25 to 325 K and using thermally stimulated discharge current (TSDC) measurements. The radiation-induced oxidation was observed using IR spectroscopy. The influence of radiation dose and accelerated aging on the intensities and the positions of the gamma and beta dielectric relaxation maxima were correlated with maxima of TSDC measurements, and found to be strongly dependent upon the changes in the microstructure of the amorphous phase and on the surface of the crystallites induced by oxidation and crosslinking. (c) 2006 Elsevier Ltd. All rights reserved.
T2  - Polymer Degradation and Stability
T1  - Effects of charge trapping in gamma irradiated and accelerated aged low-density polyethylene
VL  - 91
IS  - 9
SP  - 2229
EP  - 2232
DO  - 10.1016/j.polymdegradstab.2005.12.016
ER  - 

@article{
author = "Kostoski, Dušan and Dojčilović, Jablan R. and Novaković, L. and Suljovrujić, Edin H.",
year = "2006",
abstract = "The effects of gamma irradiation in air and accelerated aging of low-density polyethylene (LDPE) were studied through dielectric loss (tan 6) analysis in the temperature range from 25 to 325 K and using thermally stimulated discharge current (TSDC) measurements. The radiation-induced oxidation was observed using IR spectroscopy. The influence of radiation dose and accelerated aging on the intensities and the positions of the gamma and beta dielectric relaxation maxima were correlated with maxima of TSDC measurements, and found to be strongly dependent upon the changes in the microstructure of the amorphous phase and on the surface of the crystallites induced by oxidation and crosslinking. (c) 2006 Elsevier Ltd. All rights reserved.",
journal = "Polymer Degradation and Stability",
title = "Effects of charge trapping in gamma irradiated and accelerated aged low-density polyethylene",
volume = "91",
number = "9",
pages = "2229-2232",
doi = "10.1016/j.polymdegradstab.2005.12.016"
}

Kostoski, D., Dojčilović, J. R., Novaković, L.,& Suljovrujić, E. H.. (2006). Effects of charge trapping in gamma irradiated and accelerated aged low-density polyethylene. in Polymer Degradation and Stability, 91(9), 2229-2232.
https://doi.org/10.1016/j.polymdegradstab.2005.12.016

Kostoski D, Dojčilović JR, Novaković L, Suljovrujić EH. Effects of charge trapping in gamma irradiated and accelerated aged low-density polyethylene. in Polymer Degradation and Stability. 2006;91(9):2229-2232.
doi:10.1016/j.polymdegradstab.2005.12.016 .

Kostoski, Dušan, Dojčilović, Jablan R., Novaković, L., Suljovrujić, Edin H., "Effects of charge trapping in gamma irradiated and accelerated aged low-density polyethylene" in Polymer Degradation and Stability, 91, no. 9 (2006):2229-2232,
https://doi.org/10.1016/j.polymdegradstab.2005.12.016 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Kačarević-Popović, Zorica M.
AU  - Kostoski, Dušan
AU  - Dojčilović, Jablan R.
PY  - 2001
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2417
AB  - The influence of accelerated ageing on the dielectric relaxation of drawn and gamma irradiated low density polyethylene (LDPE) was studied through dielectric loss (tan delta) analysis in the temperature range from 25 to 325 K. The accelerated ageing was performed under 0.5 MPa pressure of oxygen at an elevated temperature (80 degreesC). The radiation induced and the post-irradiation oxidation were observed using IR spectroscopy. The intensity and the position of the gamma and beta dielectric relaxation maxima (tan delta (max)) were found to be strongly dependent upon the changes in the microstructure of the amorphous phase induced by crosslinking and oxidation. (C) 2001 Elsevier Science Ltd. All rights reserved.
T2  - Polymer Degradation and Stability
T1  - Effect of ageing on the dielectric relaxation of oriented and gamma irradiated LDPE
VL  - 71
IS  - 3
SP  - 367
EP  - 373
DO  - 10.1016/S0141-3910(00)00187-7
ER  - 

@article{
author = "Suljovrujić, Edin H. and Kačarević-Popović, Zorica M. and Kostoski, Dušan and Dojčilović, Jablan R.",
year = "2001",
abstract = "The influence of accelerated ageing on the dielectric relaxation of drawn and gamma irradiated low density polyethylene (LDPE) was studied through dielectric loss (tan delta) analysis in the temperature range from 25 to 325 K. The accelerated ageing was performed under 0.5 MPa pressure of oxygen at an elevated temperature (80 degreesC). The radiation induced and the post-irradiation oxidation were observed using IR spectroscopy. The intensity and the position of the gamma and beta dielectric relaxation maxima (tan delta (max)) were found to be strongly dependent upon the changes in the microstructure of the amorphous phase induced by crosslinking and oxidation. (C) 2001 Elsevier Science Ltd. All rights reserved.",
journal = "Polymer Degradation and Stability",
title = "Effect of ageing on the dielectric relaxation of oriented and gamma irradiated LDPE",
volume = "71",
number = "3",
pages = "367-373",
doi = "10.1016/S0141-3910(00)00187-7"
}

Suljovrujić, E. H., Kačarević-Popović, Z. M., Kostoski, D.,& Dojčilović, J. R.. (2001). Effect of ageing on the dielectric relaxation of oriented and gamma irradiated LDPE. in Polymer Degradation and Stability, 71(3), 367-373.
https://doi.org/10.1016/S0141-3910(00)00187-7

Suljovrujić EH, Kačarević-Popović ZM, Kostoski D, Dojčilović JR. Effect of ageing on the dielectric relaxation of oriented and gamma irradiated LDPE. in Polymer Degradation and Stability. 2001;71(3):367-373.
doi:10.1016/S0141-3910(00)00187-7 .

Suljovrujić, Edin H., Kačarević-Popović, Zorica M., Kostoski, Dušan, Dojčilović, Jablan R., "Effect of ageing on the dielectric relaxation of oriented and gamma irradiated LDPE" in Polymer Degradation and Stability, 71, no. 3 (2001):367-373,
https://doi.org/10.1016/S0141-3910(00)00187-7 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Kostoski, Dušan
AU  - Dojčilović, Jablan R.
PY  - 2001
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2461
AB  - The influence of gamma irradiation in two different atmospheres, air and distilled water on charge trapping in LDPE has been studied through dielectric loss (tan delta) analysis in the temperature range from 25 to 325 K and using thermally stimulated discharge current (TSDC) measurements. The radiation induced oxidation was observed using IR spectroscopy. The intensity and the position of the gamma and beta dielectric relaxation maxima were correlated with maxima of TSDC measurements, and found to be strongly dependent upon the changes in the microstructure of the amorphous phase and on the surface of the crystallites induced by oxidation and crosslinking. (C) 2001 Elsevier Science Ltd. All rights reserved.
T2  - Polymer Degradation and Stability
T1  - Charge trapping in gamma irradiated low-density polyethylene
VL  - 74
IS  - 1
SP  - 167
EP  - 170
DO  - 10.1016/S0141-3910(01)00150-1
ER  - 

@article{
author = "Suljovrujić, Edin H. and Kostoski, Dušan and Dojčilović, Jablan R.",
year = "2001",
abstract = "The influence of gamma irradiation in two different atmospheres, air and distilled water on charge trapping in LDPE has been studied through dielectric loss (tan delta) analysis in the temperature range from 25 to 325 K and using thermally stimulated discharge current (TSDC) measurements. The radiation induced oxidation was observed using IR spectroscopy. The intensity and the position of the gamma and beta dielectric relaxation maxima were correlated with maxima of TSDC measurements, and found to be strongly dependent upon the changes in the microstructure of the amorphous phase and on the surface of the crystallites induced by oxidation and crosslinking. (C) 2001 Elsevier Science Ltd. All rights reserved.",
journal = "Polymer Degradation and Stability",
title = "Charge trapping in gamma irradiated low-density polyethylene",
volume = "74",
number = "1",
pages = "167-170",
doi = "10.1016/S0141-3910(01)00150-1"
}

Suljovrujić, E. H., Kostoski, D.,& Dojčilović, J. R.. (2001). Charge trapping in gamma irradiated low-density polyethylene. in Polymer Degradation and Stability, 74(1), 167-170.
https://doi.org/10.1016/S0141-3910(01)00150-1

Suljovrujić EH, Kostoski D, Dojčilović JR. Charge trapping in gamma irradiated low-density polyethylene. in Polymer Degradation and Stability. 2001;74(1):167-170.
doi:10.1016/S0141-3910(01)00150-1 .

Suljovrujić, Edin H., Kostoski, Dušan, Dojčilović, Jablan R., "Charge trapping in gamma irradiated low-density polyethylene" in Polymer Degradation and Stability, 74, no. 1 (2001):167-170,
https://doi.org/10.1016/S0141-3910(01)00150-1 . .

TY  - JOUR
AU  - Suljovrujić, Edin H.
AU  - Kostoski, Dušan
AU  - Kačarević-Popović, Zorica M.
AU  - Dojčilović, Jablan R.
PY  - 1999
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2300
AB  - The dielectric loss tangent of unirradiated acid irradiated low density polyethylene (LDPE) samples was measured as a function of temperature, from 50K to room temperature, in directions normal and parallel to that of drawing. The influence of drawing and irradiation on the beta-relaxation and gamma-relaxation are related to the changes in the structure of the amorphous phase and lamellae distribution, and to the radiation-induced processes of degradation and crosslinking. (C) 1999 Society of Chemical Industry.
T2  - Polymer International
T1  - Effect of gamma irradiation on the dielectric relaxation of uniaxially oriented low density polyethylene
VL  - 48
IS  - 12
SP  - 1193
EP  - 1196
DO  - 10.1002/(SICI)1097-0126(199912)48:12 LT 1193::AID-PI232 GT 3.0.CO;2-P
ER  - 

@article{
author = "Suljovrujić, Edin H. and Kostoski, Dušan and Kačarević-Popović, Zorica M. and Dojčilović, Jablan R.",
year = "1999",
abstract = "The dielectric loss tangent of unirradiated acid irradiated low density polyethylene (LDPE) samples was measured as a function of temperature, from 50K to room temperature, in directions normal and parallel to that of drawing. The influence of drawing and irradiation on the beta-relaxation and gamma-relaxation are related to the changes in the structure of the amorphous phase and lamellae distribution, and to the radiation-induced processes of degradation and crosslinking. (C) 1999 Society of Chemical Industry.",
journal = "Polymer International",
title = "Effect of gamma irradiation on the dielectric relaxation of uniaxially oriented low density polyethylene",
volume = "48",
number = "12",
pages = "1193-1196",
doi = "10.1002/(SICI)1097-0126(199912)48:12 LT 1193::AID-PI232 GT 3.0.CO;2-P"
}

Suljovrujić, E. H., Kostoski, D., Kačarević-Popović, Z. M.,& Dojčilović, J. R.. (1999). Effect of gamma irradiation on the dielectric relaxation of uniaxially oriented low density polyethylene. in Polymer International, 48(12), 1193-1196.
https://doi.org/10.1002/(SICI)1097-0126(199912)48:12 LT 1193::AID-PI232 GT 3.0.CO;2-P

Suljovrujić EH, Kostoski D, Kačarević-Popović ZM, Dojčilović JR. Effect of gamma irradiation on the dielectric relaxation of uniaxially oriented low density polyethylene. in Polymer International. 1999;48(12):1193-1196.
doi:10.1002/(SICI)1097-0126(199912)48:12 LT 1193::AID-PI232 GT 3.0.CO;2-P .

Suljovrujić, Edin H., Kostoski, Dušan, Kačarević-Popović, Zorica M., Dojčilović, Jablan R., "Effect of gamma irradiation on the dielectric relaxation of uniaxially oriented low density polyethylene" in Polymer International, 48, no. 12 (1999):1193-1196,
https://doi.org/10.1002/(SICI)1097-0126(199912)48:12 LT 1193::AID-PI232 GT 3.0.CO;2-P . .