摘要
以9,10-二氢-9-氧-10-磷杂菲-10-氧化物-1,4-苯二酚(DOPO-HQ)为阻燃剂,环氧树脂(EP)为基料,制备了侧基含磷阻燃环氧树脂(DOPO-EP),利用热分析技术(TGA)研究了EP和DOPO-EP在氮气气氛下的热降解动力学行为,采用Flynn-Wall-Ozawa方法计算了EP和DOPO-EP热降解活化能,分别为204kJ/mol和206kJ/mol,Friedman方法验证了Flynn-Wall-Ozawa方法的合理性。采用Coats-Redfern方法选取不同机理模型,研究了EP和DOPO-EP的热降解固化反应机理,得出EP和DOPO-EP的热降解动力学机理属于R2模型,反应级数中的二维相界面反应,圆柱形对称,其机理函数均为f(α)=2(1-α)1/2(0.1≤α≤0.7)。
Phosphorus-containing flame retardant epoxy resin（DOP（）-EP） was prepared from 10-（2,5-dihydroxyphe- nyl）-9-10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide （DOPO-HQ.） as flame retardant and epoxy resin （EP） as matrix. The thermal degradation of EP and DOPO-EP was studied by thermogravimetric analysis （TGA） to deter- mine kinetics parameters. The apparent activation energies of EP and DOPO-EP were determined by using Flynn- Wall-（）zawa and Friedman methods, and the activation energies were 204 kJ/mol,206 kJ/mol respectively. Different mechanism models were selected hy Coats-Redfern method to study curing reaction mechanism. The thermal degra- dation mechanism of EP and DOPO-EP obeyed shrinkage of cylindrical symmetry and two-dimensional interracial re- action,and could be described by R2model with an integral form f （a） = 2 （l--a） 1/2
出处
《山东科技大学学报（自然科学版）》
CAS
2014年第4期37-42,共6页
Journal of Shandong University of Science and Technology(Natural Science)
基金
青岛开发区科技发展计划项目(2011-2-38)
关键词
热降解动力学
热重分析
环氧树脂
活化能
thermal degradation kinetics
thermogravimetric analysis
epoxy resin
activation energies
