TY  - JOUR
AU  - Jovanović, Vojislav
AU  - Samaržija-Jovanović, Suzana
AU  - Dekic, Biljana
AU  - Dekic, Vidoslav
AU  - Marinović-Cincović, Milena
AU  - Marković, Gordana
AU  - Konstaninovic, Sandra
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5930
AB  - Two types of nanosilica-based urea-formaldehyde (UF) hybrid materials with formaldehyde to urea (F/U) ratio (0.8) were synthesized without (UF + SiO2) and with coumarin (4-chloro-3-nitro-2H-chromen-2-one). Obtained composites have been irradiated (50 kGy) and their radiation stability was evaluated on the basis of thermal behavior before and after irradiation. The thermal properties of materials were studied by nonisothermal thermogravimetric analysis, differential thermal gravimetry, differential thermal analysis and differential scanning calorimetry supported by data from infrared spectroscopy. The free formaldehyde percentage was determined for all prepared samples. The shift of temperature values for selected mass loss to a high temperature indicates the increase in thermal stability of materials with coumarin after gamma-irradiation. The free formaldehyde percentage was reduced after irradiation from 15% to 3% for sample without coumarin and from 7% to 4% for sample with coumarin. The asymmetric stretching vibrations of -N-CH2-N- absorption band and nu(as)(Si-O) of siloxane or silicone in FTIR spectra of irradiated coumarin compound are shifted to higher wave number values and confirmed its higher thermal stability.
T2  - Journal of Thermoplastic Composite Materials
T1  - The effect of gamma-irradiation on thermal behavior of composites based on nanosilica and 4-chloro-3-nitro-2H-chromen-2-one-modified urea-formaldehyde
VL  - 27
IS  - 5
SP  - 632
EP  - 649
DO  - 10.1177/0892705712453156
ER  - 

@article{
author = "Jovanović, Vojislav and Samaržija-Jovanović, Suzana and Dekic, Biljana and Dekic, Vidoslav and Marinović-Cincović, Milena and Marković, Gordana and Konstaninovic, Sandra",
year = "2014",
abstract = "Two types of nanosilica-based urea-formaldehyde (UF) hybrid materials with formaldehyde to urea (F/U) ratio (0.8) were synthesized without (UF + SiO2) and with coumarin (4-chloro-3-nitro-2H-chromen-2-one). Obtained composites have been irradiated (50 kGy) and their radiation stability was evaluated on the basis of thermal behavior before and after irradiation. The thermal properties of materials were studied by nonisothermal thermogravimetric analysis, differential thermal gravimetry, differential thermal analysis and differential scanning calorimetry supported by data from infrared spectroscopy. The free formaldehyde percentage was determined for all prepared samples. The shift of temperature values for selected mass loss to a high temperature indicates the increase in thermal stability of materials with coumarin after gamma-irradiation. The free formaldehyde percentage was reduced after irradiation from 15% to 3% for sample without coumarin and from 7% to 4% for sample with coumarin. The asymmetric stretching vibrations of -N-CH2-N- absorption band and nu(as)(Si-O) of siloxane or silicone in FTIR spectra of irradiated coumarin compound are shifted to higher wave number values and confirmed its higher thermal stability.",
journal = "Journal of Thermoplastic Composite Materials",
title = "The effect of gamma-irradiation on thermal behavior of composites based on nanosilica and 4-chloro-3-nitro-2H-chromen-2-one-modified urea-formaldehyde",
volume = "27",
number = "5",
pages = "632-649",
doi = "10.1177/0892705712453156"
}

Jovanović, V., Samaržija-Jovanović, S., Dekic, B., Dekic, V., Marinović-Cincović, M., Marković, G.,& Konstaninovic, S.. (2014). The effect of gamma-irradiation on thermal behavior of composites based on nanosilica and 4-chloro-3-nitro-2H-chromen-2-one-modified urea-formaldehyde. in Journal of Thermoplastic Composite Materials, 27(5), 632-649.
https://doi.org/10.1177/0892705712453156

Jovanović V, Samaržija-Jovanović S, Dekic B, Dekic V, Marinović-Cincović M, Marković G, Konstaninovic S. The effect of gamma-irradiation on thermal behavior of composites based on nanosilica and 4-chloro-3-nitro-2H-chromen-2-one-modified urea-formaldehyde. in Journal of Thermoplastic Composite Materials. 2014;27(5):632-649.
doi:10.1177/0892705712453156 .

Jovanović, Vojislav, Samaržija-Jovanović, Suzana, Dekic, Biljana, Dekic, Vidoslav, Marinović-Cincović, Milena, Marković, Gordana, Konstaninovic, Sandra, "The effect of gamma-irradiation on thermal behavior of composites based on nanosilica and 4-chloro-3-nitro-2H-chromen-2-one-modified urea-formaldehyde" in Journal of Thermoplastic Composite Materials, 27, no. 5 (2014):632-649,
https://doi.org/10.1177/0892705712453156 . .

TY  - JOUR
AU  - Jovanović, Vojislav
AU  - Samaržija-Jovanović, Suzana
AU  - Dekic, Biljana
AU  - Dekic, Vidoslav
AU  - Konstaninovic, Sandra
AU  - Marković, Gordana
AU  - Marinović-Cincović, Milena
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5286
AB  - Two types of nano-silica based urea-formaldehyde (UF) hybrid composite materials with formaldehyde to urea (F/U) ratio (0.8) were synthesized without (UF + SiO2) and with coumarin (UF + SiO2 + 4-chloro-3-nitro-2H-chromen-2-one). Nano-silica based UF hybrid composites have been irradiated (50 kGy) and effect of gamma-irradiation was evaluated on the basis of thermo-oxidative behavior before and after irradiation. The thermo-oxidative behavior of materials was studied by non-isothermal thermo-gravimetric analysis (TG), differential thermo-gravimetry (DTG) and differential thermal analysis (DTA) supported by data from IR spectroscopy. After gamma-irradiation, the shift of temperature values for selected mass loss to a higher temperature indicates that thermo-oxidative stability of modified nano-silica based UF resin with coumarin 4-chloro-3-nitro-2H-chromen-2-one is increase. (c) 2012 Elsevier Ltd. All rights reserved.
T2  - Composites: Part B: Engineering
T1  - Effect of gamma-irradiation on the thermo-oxidative behavior of nano-silica based urea-formaldehyde hybrid composite with 4-chloro-3-nitro-2H-chromen-2-one
VL  - 45
IS  - 1
SP  - 864
EP  - 870
DO  - 10.1016/j.compositesb.2012.07.025
ER  - 

@article{
author = "Jovanović, Vojislav and Samaržija-Jovanović, Suzana and Dekic, Biljana and Dekic, Vidoslav and Konstaninovic, Sandra and Marković, Gordana and Marinović-Cincović, Milena",
year = "2013",
abstract = "Two types of nano-silica based urea-formaldehyde (UF) hybrid composite materials with formaldehyde to urea (F/U) ratio (0.8) were synthesized without (UF + SiO2) and with coumarin (UF + SiO2 + 4-chloro-3-nitro-2H-chromen-2-one). Nano-silica based UF hybrid composites have been irradiated (50 kGy) and effect of gamma-irradiation was evaluated on the basis of thermo-oxidative behavior before and after irradiation. The thermo-oxidative behavior of materials was studied by non-isothermal thermo-gravimetric analysis (TG), differential thermo-gravimetry (DTG) and differential thermal analysis (DTA) supported by data from IR spectroscopy. After gamma-irradiation, the shift of temperature values for selected mass loss to a higher temperature indicates that thermo-oxidative stability of modified nano-silica based UF resin with coumarin 4-chloro-3-nitro-2H-chromen-2-one is increase. (c) 2012 Elsevier Ltd. All rights reserved.",
journal = "Composites: Part B: Engineering",
title = "Effect of gamma-irradiation on the thermo-oxidative behavior of nano-silica based urea-formaldehyde hybrid composite with 4-chloro-3-nitro-2H-chromen-2-one",
volume = "45",
number = "1",
pages = "864-870",
doi = "10.1016/j.compositesb.2012.07.025"
}

Jovanović, V., Samaržija-Jovanović, S., Dekic, B., Dekic, V., Konstaninovic, S., Marković, G.,& Marinović-Cincović, M.. (2013). Effect of gamma-irradiation on the thermo-oxidative behavior of nano-silica based urea-formaldehyde hybrid composite with 4-chloro-3-nitro-2H-chromen-2-one. in Composites: Part B: Engineering, 45(1), 864-870.
https://doi.org/10.1016/j.compositesb.2012.07.025

Jovanović V, Samaržija-Jovanović S, Dekic B, Dekic V, Konstaninovic S, Marković G, Marinović-Cincović M. Effect of gamma-irradiation on the thermo-oxidative behavior of nano-silica based urea-formaldehyde hybrid composite with 4-chloro-3-nitro-2H-chromen-2-one. in Composites: Part B: Engineering. 2013;45(1):864-870.
doi:10.1016/j.compositesb.2012.07.025 .

Jovanović, Vojislav, Samaržija-Jovanović, Suzana, Dekic, Biljana, Dekic, Vidoslav, Konstaninovic, Sandra, Marković, Gordana, Marinović-Cincović, Milena, "Effect of gamma-irradiation on the thermo-oxidative behavior of nano-silica based urea-formaldehyde hybrid composite with 4-chloro-3-nitro-2H-chromen-2-one" in Composites: Part B: Engineering, 45, no. 1 (2013):864-870,
https://doi.org/10.1016/j.compositesb.2012.07.025 . .