摘要
本工作用热重法(TG)研究了聚芳醚醚酮(PEEK)在空气和氮气中的热分解反应过程;确定了PEEK在这两种气氛中的热分解反应模型均符合无规引发断裂模型;在空气中PEEK的热分解显示两个过程,由此计算其在空气中第一阶段的热分解和氮气中的热分解反应活化能分别为214.7kJ/mol和232.2kJ/mol;由热分解反应动力学参数推算出热老化寿命曲线,并讨论了实验条件对结果的影响,进而以失重5%作为材料寿终指标估算出PEEK在氮气和空气中使用10年的最高温度分别为307℃和274℃。
The thermal lifetime of poly (aryl ether ether ketone) in both nitrogen and air were investigated by dynamic thermogravimetry. Based on the kinetic models, all of the experimental data showed that only thermal degradation takes place in nitrogen, on the other hand, two weight loss steps on the TG curves in air correspond to thermal degradation and following thermal oxidative degradation. The activation energies of the thermal degradation were found to be 232.2 kJ/mol and 214.7 kJ/mol in nitrogen and air, respectively. Furthermore, an estimation method of the thermal lifetime of PEEK in nitrogen and air was suggested.
出处
《功能高分子学报》
CAS
CSCD
1993年第4期309-314,共6页
Journal of Functional Polymers
基金
中国科学院高分子物理联合开放实验室资助
关键词
聚芳醚醚酮
热重法
热老化寿命
poly (aryl ether ether ketone), dynamic thermogravimetry, thermal degradation, thermal oxidative degradation, lifetime.
