Thermal degradation and evolved gas analysis of epoxy (DGEBA)/novolac resin blends (ENB) during pyrolysis and combustion
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The thermal degradation of epoxy (DGEBA) and phenol formaldehyde (novolac) resins blend was investigated by using thermogravimetric analysis (TGA) coupled with Fourier transform infrared spectroscopy and mass spectroscopy. The results of TGA revealed that the thermal degradation process can be subdivided into four stages: drying the sample, fast and second thermal decomposition, and further cracking process of the polymer. The total mass loss of 89.32 mass% at 950 °C is found during pyrolysis, while the polymer during the combustion almost finished at this temperature. The emissions of carbon dioxide, aliphatic hydrocarbons, carbon monoxide, etc., while aromatic products, are emitted at higher temperature during combustion and pyrolysis. It was observed that the intensities of CO2, CO, H2O, etc., were very high when compared with their intensities during pyrolysis, attributed to the oxidation of decomposition product.
KeywordsEpoxy Phenol–formaldehyde resin TG–FTIR–MS Combustion
This work is supported by Deanship of Scientific Research, Research Center, College of Science, King Saud University, Riyadh.
- 1.May CA. Epoxy resins chemistry and technology, 2nd edition. New York: Marcel Dekker Inc; 1988.Google Scholar
- 2.Petrie EM. Epoxy adhesive formulations. New York: McGraw-Hill Publishing; 2006.Google Scholar
- 3.Pham HQ, Marks MJ. Encyclopedia of polymer science and technology. New York: Wiley; 2004.Google Scholar
- 8.Shasha L, Shuhua Q, Nailiang L, Peng C. Study on thermal conductive BN/novolac resin composites. Thermochim Acta. 2011;523(1–2):111–5.Google Scholar
- 9.Derouet D, Morvan F, Bross JC. Chemical modification of epoxy resins by dialkyl(or aryl) phosphates: evaluation of fire behavior and thermal stability. JAppl Polym Sci. 1996;62(11):1855–68.Google Scholar
- 19.Tansir A. Alshehri SM, Thermal degradation and evolved gas analysis of thiourea-formaldehyde resin (TFR) during pyrolysis and combustion J. Therm. Anal. Calorim, 2011 (in press).Google Scholar
- 21.Ahamad T, Alshehri S.M, Thermal, microbial, and corrosion resistant metal-containing poly(Schiff) epoxy coatings, J Coat Technol Res 2012. (in press). doi: 10.1007/s11998-011-9393-3.
- 23.Nishat N, Ahmad S, Tansir Ahamad R. Synthesis and characterization of antibacterial polychelates of urea–formaldehyde resin with Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), and Zn(II) metal ions. J Appl Polym Sci. 2006;100:928–36.Google Scholar