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
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Jovanović, VojislavSamaržija-Jovanović, Suzana
Dekic, Biljana
Dekic, Vidoslav
Marinović-Cincović, Milena
Marković, Gordana
Konstaninovic, Sandra
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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.
Keywords:
thermal analysis / nanosilica / composite materials / Coumarin / gamma-irradiation / resinsSource:
Journal of Thermoplastic Composite Materials, 2014, 27, 5, 632-649Funding / projects:
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Multiscale structuring of polymer nanocomposites and functional materials based on different precursors (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45022)
DOI: 10.1177/0892705712453156
ISSN: 0892-7057; 1530-7980
WoS: 000333382600007
Scopus: 2-s2.0-84899125340
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VinčaTY - 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 . .