主链含苯基均三嗪联苯型聚芳醚的热稳定性
Release Time:2019-03-10 Hits:
Indexed by:Journal Article
Date of Publication:2010-04-15
Journal:高分子材料科学与工程
Included Journals:CSCD、ISTIC、PKU、EI
Volume:26
Issue:4
Page Number:75-77,81
ISSN:1000-7555
Key Words:亲核取代;聚芳醚;苯基均三嗪;热分解动力学
Summary:利用热重分析(TG、DTG)研究了主链含苯基均三嗪联苯型聚芳醚在不同气氛和升温速率时的热降解动力学.比较了升温速率和气体气氛对热降解行为的影响,结果表明,该聚合物具有优异的耐热性和耐热氧化稳定性.用FlynnWall-Ozawa,Freeman-carroll等方法进行了动力学处理,计算得热降解反应活化能分别为291.19 kJ/mol,286.83 kJ/mol,与Kissinger法计算活化能值283.25 kJ/mol非常接近.结合Coats-Redfern方法,推测出聚合物在氮气气氛中的热分解机理为F2机理,其机理函数积分式为g(a)=1/(1-a).
Prev One:Synthesis and characterization of poly(arylene ether s-triazine)s containing alkyl-, aryl- and chloro-substituted phthalazinone moieties in the main chain
Next One:Synthesis and characterization of partly fluorinated poly(phthalazinone ether)s crosslinked by allyl group for passive optical waveguides