聚苯硫醚砜的热老化  

STUDIES ON THE THERMAL LIFETIME OF POLY (PHENYENE SULFIDE SULFONE

作　　者：王华东[1] 杨杰[1] 邹萍[1] 龙盛如[1] 杜宗英[1] 

机构地区：[1]四川大学分析测试中心,四川成都610064

出　　处：《高分子材料科学与工程》2004年第1期153-156,共4页Polymer Materials Science & Engineering

基　　金：十五863资助项目

摘　　要：采用热分析的方法对高性能材料聚苯硫醚砜(PPSS)在氮气气氛和空气气氛中的热老化寿命进行了研究。通过Kissinger方法分别求得材料在氮气中的活化能为E=214.24kJ/mol,在空气中的活化能E=258.64kJ/mol,由Coats-Redfern法确定了材料在氮气和空气中热分解的第一个阶段都为一级反应,并根据Dakin提出的经验关系式作出老化寿命曲线,由此得出聚苯硫醚砜(PPSS)在氮气气氛和空气气氛中使用十年的上限温度为254℃和388℃。The thermal degradation of Poly (phenylene sulfide sulfone) (PPSS) was studied by thermogravimetric analysis in both nitrogen and air to determine the thermal lifetime. The TG curves shows that only thermal degradation takes place in nitrogen, but two weight loss steps in air corresponding to thermal degradation and thermal oxidative degradation. The activation energy of PPSS was determined using Kissing′s method, resulting to be (214.24) kJ/mol in nitrogen and (258.64) kJ/mol in air. It was found that the thermal degradation is first order reaction by using Coats-Redfern method. Based on the Parameters of E, A, and n, the lifetime of PPSS in nitrogen and in air were estimated.

关 键 词：聚苯硫醚砜 热老化 热分解反应 活化能 

分 类 号：TQ326.55[化学工程—合成树脂塑料工业]