Synthesis and properties of cross-linkable high molecular weight fluorinated copolyimides
作者:Hongyan Yao、Yunhe Zhang、Yu Liu、Kaiyuan You、Shanyou Liu、Baijun Liu、Shaowei Guan
DOI:10.1002/pola.27007
日期:2014.2.1
A series of novel high molecular weight fluorinated co‐polyimides (Co‐PIs) containing styryl side chain based on 1,3‐bis(2‐trifluoromethyl‐4‐aminophenoxy)‐5‐(2,3,4,5‐tetrafluorophenoxy)benzene (6FTFPB) were successfully synthesized. The weight‐average molecular weights (Mws) and polydispersities of the co‐polyimides were in the range 8.93–10.81 × 104 and 1.33–1.82, respectively. The co‐polyimide film
甲一系列新的高分子量的氟化的含苯乙烯基侧链共聚酰亚胺(共PIS)基于1,3-双(2-三氟甲基-4-氨基苯氧基)-5-(2,3,4,5- tetrafluorophenoxy)苯(6FTFPB)已成功合成。共聚酰亚胺的重均分子量(M w s)和多分散性在8.93–10.81×10 4的范围内和1.33–1.82分别。共聚酰亚胺薄膜在有机溶剂中显示出优异的溶解性,高拉伸性能(抗张强度超过91 MPa),出色的光学透明性(在332–339 nm处的截止波长和在550 nm处的透光率大于89%)热稳定性(5%的热失重温度,最高510°C)。流延和纺丝薄膜可以通过热固化交联。与共聚酰亚胺相比,固化膜具有更好的结合性能(包括优异的耐溶剂性)。例如,Co-PI-1(6FTFPB的摩尔比为30%)的玻璃化转变温度从217°C升高到271°C,拉伸强度从94 MPa增强到96 MPa,热失重温度为5%。从5