共聚型聚酰亚胺纤维的结构与性能  

Structure and Performance of Co-Polyimide Fibers

作　　者：于文骁[1] 汪晓东[1] 吴战鹏[1] 牛鸿庆[1] 韩恩林[1] 武德珍[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《合成纤维》2013年第9期12-16,共5页Synthetic Fiber in China

基　　金：国家"十二五"支撑计划(2011BAE29B04)

摘　　要：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 eo-polyimide （PI） fibers were prepared by wet-spinning technology, one was derived from bipheny tetraearboxylic/pyromellitic dianhydride/phenylene diamine （BPDA/PMDA/PPDA） and the other was bipheny tetracarboxylic/pyromellitic dianhydride/phenylene diamine /diamino dipheny ether（BPDM 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 oxida- tive degradation of two fibers in air was calculated and compared by Kissinger method and Flynn-Wall- Ozawa 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：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 

分 类 号：TQ342.1[化学工程—化纤工业]