室温固化剂对硅树脂热分解反应动力学的影响  

Effects of Room-Temperature Curing Agent on the Thermal Degradation Kinetics of Poly(methylphenylsiloxane)

作　　者：孙举涛[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《高校化学工程学报》2008年第3期532-537,共6页Journal of Chemical Engineering of Chinese Universities

摘　　要：采用Flynn-Wall-Ozawa和Friedman法分别计算了高温和室温条件下固化硅树脂的热分解反应动力学参数,研究了室温固化剂四乙撑五胺对硅树脂两个热降解过程("解扣"降解和"重排"降解)的热分解反应动力学的影响。结果表明,高温固化硅树脂的"解扣"式热降解的活化能为168.52kJ·mol-1,反应级数为3.31,频率因子为1.31×1011s-1,而"重排"式降解的活化能为230.42kJ·mol-1,反应级数为2.08,频率因子为7.23×1014s-1。四乙撑五胺对硅树脂"解扣"式热降解影响明显,活化能比高温固化的硅树脂低大约21kJ·mol-1,而对硅树脂"重排"降解的热降解反应动力学影响不大。The thermal degradation kinetic parameters of poly(methylphenylsiloxane) (PMPS) were determined by using Flynn-Wall-Ozawa and Friedman methods, respectively, and the effects of room-temperature curing agent (tetraethylenephentamine) on the two different degradation processes ("unzipped degradation" and "rearranged degradation") of PMPS were investigated. The results show that, for PMPS cured at high temperature, the values of activation energy (E), reaction order (n) and pre-exponential factor (A) for "unzi...

关 键 词：甲基苯基有机硅树脂 热稳定性 室温固化 热降解反应动力学 

分 类 号：O643.1[理学—物理化学]