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Flame retardancy and thermal degradation behaviors of epoxy resins containing bisphenol a bis (diphenyl phosphate) oligomer
Author(s) -
Gao Ming,
Sun Yingjuan
Publication year - 2013
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23360
Subject(s) - epoxy , oligomer , materials science , bisphenol a , degradation (telecommunications) , phosphate , composite material , thermal , polymer chemistry , chemical engineering , organic chemistry , chemistry , physics , engineering , telecommunications , meteorology , computer science
Bisphenol A bis (diphenyl phosphate) oligomer (BBO) as flame retardant was synthesized, whose structure was characterized by IR and NMR. In all, 20% weight mixture polyphosphoric acid (APP) and BBO was doped into epoxy resins (EPs) to get 26.0% of limiting oxygen index and UL 94 V‐0. The degradation behavior of EP‐containing BBO/APP was studied by thermogravimetry, differential thermogravimetry, scanning electron microscopy, and cone calorimeter. The activation energies for the decomposition of EP samples are obtained using the method of Kissinger. The experimental results exhibited that for EP‐containing BBO/APP, compared with EP, initial decomposition temperature, maximum temperature at the peak position ( T m ), and the activation energy for the decomposition are decreased, whereas the maximum weight loss rate ( R max ), char yields, and the inherent thermal stability are increased. Meanwhile, heat release, smoke production, and CO yield and CO 2 yield of EP‐containing BBO/APP are much decreased compared with those of EP. The thermal degradation mechanism of EP‐containing BBO/APP has been proposed. POLYM. ENG. SCI., 2013. © 2013 Society of Plastics Engineers