PPD对PAA溶液性质及其纤维结构的影响  

Effect of PPD on PAA solution property and fiber structure

作　　者：蔡小川[1] 许伟[1] 黄荣辉[1] 刘向阳[1] 顾宜[1] 叶光斗[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065

出　　处：《合成纤维工业》2009年第5期1-4,共4页China Synthetic Fiber Industry

基　　金：国家自然科学基金重点项目(50433010)。

摘　　要：以均苯四酸二酐（PMDA）和4，4＇-二氨基二苯醚（ODA）以及PMDA，ODA和对苯二胺（PPD）共聚合成聚酰胺酸（PAA），经湿法纺丝制备PAA纤维。研究了PPD的引入对PAA原液性质及其纤维形态结构的影响。结果表明：PAA的特性粘数随着PPD含量增加而提高；PPD的引入使PAA的凝固性能及其纤维力学性能提高；凝固浴为水／乙醇，水含量较高时，含有PPD的PAA纤维截面结构变得疏松多孔；凝固浴为水／N-甲基吡咯烷酮，水体积分数为70％-80％时，得到致密无孔的改性PAA纤维。Polyamid acid （PAA） was synthesized from pyromellitic dianhydride （ PMDA ） and 4,4＇ -oxydianiline （ODA） or PMDA, ODA and 1,4-benzenediamine （PPD） by copolymerization. PAA fiber was prepared by wet spinning process. The effect of the addition of PPD on the properties of PPD solution and the morphology and structure of PPD fiber was studied. The results showed that the intrinsic viscosity of PAA was increased with the increase of PPD content. The addition of PPD improved the coagulation behavior of PAA and the mechanical properties of PAA fiber. The section structure of PAA fiber containing PPD became loose and porous at high water content in water/alcohol coagulation bath. The modified PAA fiber appeared compacted and non- porous as the water volume fraction was 70% -80% in water/N-methyl pyrrolidone coagulation bath.

关 键 词：聚酰亚胺纤维 聚酰胺酸纤维 凝固性能 结构 

分 类 号：TQ342.73[化学工程—化纤工业]