溴化环氧树脂协同三氧化二锑阻燃PBT热分解动力学研究  

Study on Thermal Decomposition Kinetics of PBT Flame-Retarded by Brominated Epoxy Resin Synchronized with Antimony Trioxide

作　　者：徐晓楠[1] 王芳[1] 张晴[1] 

机构地区：[1]中国人民武装警察部队学院消防工程系,河北廊坊065000

出　　处：《塑料科技》2009年第10期34-39,共6页Plastics Science and Technology

摘　　要：利用热重分析法研究了聚对苯二甲酸丁二醇酯(PBT)及溴化环氧树脂(BER)协同三氧化二锑(Sb2O3)阻燃PBT在不同升温速率下的热稳定性及热分解动力学;采用Kissinger及Flynn-Wall-Ozawa方法计算出了PBT和阻燃PBT的热分解活化能;利用Coats-Redfern方法确定了PBT和阻燃PBT的热分解动力学机理及其模型,得出了聚合物主降解阶段的非等温动力学方程。结果表明:BER协同Sb2O3阻燃体系的添加提高了PBT的阻燃性能;通过Kissinger和FWO法的分析可知,阻燃PBT在主分解阶段的活化能明显提高;PBT的热分解机理函数为g(α)=1-(1-α)1/3,阻燃PBT的热分解机理函数为g(α)=2[(1-α)-1/2-1],反应级数n=1.5。The thermal stability and thermal decomposition kinetics of pure PBT and PBT flame-retarded by brominated epoxy resin （BER） synchronized with antimony trioxide （Sb203） were investigated by TG analysis at different heating rates. The thermal decomposition activation energy of pure PBT and flame-retarded PBT were determined by using Kissinger and Flynn-WalI-Ozawa methods, The thermal decomposition kinetic mechanism and the non-isothermal kinetic equation of PBT and flame-retarded PBT were determined by Coats-Redfern method. The results show that： the addition of BER synchronized with Sb2O3 improves the flame retardancy of PBT; the activation energy of flame-retarded PBT during the main decomposition increases obviously according to the analysis of Kissinger and FWO methods; the thermal decomposition mechanism function of PBT is g（a ）= 1-（1-a ）1/3, and the thermal decomposition mechanism function of flame-retarded PBT is g（ a ）= 2[（1-a ）1/2-1], and the reaction order is n=1.5.

关 键 词：溴化环氧树脂 聚对苯二甲酸丁二醇酯 三氧化二锑 热分解 动力学 阻燃机理 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]