溴化环氧树脂协同三氧化二锑阻燃PET热分解动力学研究

The kinetic study on thermal degradation of brominated epoxy resin in synchronizing antimony trioxide flame-retarded pet

利用热重分析法（TG）研究了溴化环氧树脂（BER）协同三氧化二锑（Sb203）阻燃聚对苯二甲酸乙二醇酯（PET）（FR／PET）在不同升温速率下的热稳定性，升温速率10～40℃／min^-1，氮气保护，并进行了热分解动力学分析。采用Kissinger及Flynn—Wall-Ozawa方法分析了PET和FR／PET的热分解活化能；利用Coats—Redfern方法确定了PET和FR／PET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PET的阻燃性能，降解模式发生了变化，PET的机理函数为g（a）=1—2a／3-（1-a）3／2，FR／PET的机理函数为g（d）-（1-a）^-1，反应级数n=2。

Thermal stability and thermal degradation kinetics of Polyethylene terepthalate（PET） and flame retardant retardant PET added brominated epoxy resin synchronizing antimony trioxide（Sb2O3 ） （FR/PET） were investigated by a conventional dynamic thermogravimetric analysis （TG） under highly purity N2 atmosphere at different heating rates between 10 and 40℃/ min^-1. The thermal degradation activation energy of PET and FR/PET were determined by using Kissinger and Flynn--Wall --Ozawa method. The thermal degradation kinetic mechanism and the isothermal kinetic equations of PET and FR/PET were determined by Coats--Redfern method. The flame retardant PET was improved because decomposition pattern of PET changed, The thermal decomposition kinetic equation of FR/ PET can be expressed asg（a）= （1-a）^-1-1, and the reaction order was n=2.