摘要
针对均苯四甲酸二酐和4,4′-二氨基二苯醚体系两步法制备的聚酰亚胺(PI)纤维强度比较偏低的问题,加入刚性单体对苯二胺,在N-甲基吡咯烷酮中进行三元共聚得到聚酰胺酸(PAA),选用水和乙醇的混合溶液为凝固浴通过干湿法纺制出PAA纤维。对PAA纤维进行不同倍数的拉伸,然后通过优化酰亚胺化条件制得了致密的PI纤维,处理温度在400℃时,其强度和模量可分别达到4．29 cN/dtex和389 cN/dtex。
To improve the tenacity of polyimide （PI） fiber prepared by two-step process 1,4-benzenediamine, a rigid mono- mer, was introduced into the system of pyromellitic dianhydride and 4,4＇ -diamino diphenyl and ternary copolymerized with N- methylpyrrolidone to yield polyamic acid （PAA） which was spun into PAA fiber by dry-wet spinning using the mixture solution of water and alcohol as coagulation bath. PAA fiber was drawn at different ratios and produced into compacted PI fiber under the optimized imidization conditions. The tenacity and modulus were 4.29 cN/dtex and 389 cN/dtex, respectively, at treating temperature 400℃.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2007年第1期1-4,共4页
China Synthetic Fiber Industry
基金
国家自然科学基金(20274026)。
关键词
聚酰胺酸
聚酰亚胺纤维
共聚
凝固浴
形态结构
polyamic acid
polyimide fiber
copolymerization
coagulation bath
morphology
