于文骁,汪晓东,吴战鹏,牛鸿庆,韩恩林,武德珍
YU Wen-xiao,WANG Xiao-dong,NIU Hong-qing,HEN En-lin,WU De-zhen,Materials Science and Engineering of Beijing University of Chemical Technology

• 1:北京化工大学材料科学与工程学院

摘要(Abstract)：

通过湿法纺丝工艺制备了3,3′,4,4′-聚苯四甲酸酐(BPDA)-均苯四甲酸酐(PMDA)-对苯二胺(PPDA)三元共聚型聚酰亚胺纤维和用4,4′-二氨基二苯醚(ODA)部分代替PPDA的四元共聚型聚酰亚胺纤维,柔性单体ODA的引入有效提高了共聚纤维的断裂伸长率,但引起断裂强度、初始模量和玻璃化转变温度及热分解温度的降低。采用Kissinger和Flynn-Wall-Ozawa两种方法对两种纤维在空气中的热分解表观活化能进行了计算,均是加入ODA单体的共聚纤维的热分解表观活化能较低,由此造成其耐热性下降。
Two co-polyimide(PI)fibers were prepared by wet-spinning technology, one was derived from bipheny tetracarboxylic/pyromellitic dianhydride/phenylene diamine(BPDA/PMDA/PPDA) and the other was bipheny tetracarboxylic/pyromellitic dianhydride/phenylene diamine /diamino dipheny ether(BPDA/PMDA/PPDA/ODA). ODA would greatly increase the elongation but reduce the mechanical behavior,glass transition temperature and thermostability of co-PI fiber. The apparent activation energy of thermal oxidative degradation of two fibers in air was calculated and compared by Kissinger method and Flynn-WallOzawa method and the results showed that ODA would reduce the apparent activation energy and lead to a decline in thermalstability of co-PI fiber.

关键词(KeyWords)： 共聚型聚酰亚胺纤维;力学性能;玻璃化转变温度;热稳定性;表观活化能
co-polyimide fiber,mechanical property,glass-transition temperature,thermostability,apparent activation energy

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”支撑计划(2011BAE29B04)

作者(Author): 于文骁,汪晓东,吴战鹏,牛鸿庆,韩恩林,武德珍
YU Wen-xiao,WANG Xiao-dong,NIU Hong-qing,HEN En-lin,WU De-zhen,Materials Science and Engineering of Beijing University of Chemical Technology

DOI: 10.16090/j.cnki.hcxw.2013.09.010

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