Polyimides containing a novel bisbenzoxazole with high Tg and low CTE

被引：11

作者：

Chen, Haiquan ^{[1
]}

Dai, Fengna ^{[1
]}

Wang, Mengxia ^{[1
]}

Chen, Chunhai ^{[1
]}

Qian, Guangtao ^{[1
]}

Yu, Youhai ^{[1
]}

机构：

[1] Donghua Univ, Ctr Adv Low Dimens Mat, State Key Lab Modificat Chem Fibers & Polymer Mat, Coll Mat Sci & Engn, Shanghai 201620, Peoples R China

来源：

RSC ADVANCES | 2021年 / 11卷 / 28期

关键词：

THERMAL IMIDIZATION; MOLECULAR PACKING; BENZIMIDAZOLE; IMIDE)S; FIBERS;

D O I：

10.1039/d1ra02218k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel diamine named (2,2 '-bibenzoxazole)-5,5 '-diamine (DBOA) and derived polyimides (PIs) were successfully synthesized. The rigid, linear, symmetrical molecular structure and the strong charge transfer complex (CTC) were considered to be the reasons for the improved molecular packing and enhanced thermal properties of the polymers. These DBOA based PIs exhibited a higher glass transition temperature (T-g) and lower coefficient of thermal expansion (CTE) than traditional benzoxazole (BOA) based PIs. Meanwhile, the PI derived from DBOA and BPDA (3,3 ',4,4 '-biphenyltetracarboxylic dianhydride) exhibited high T-g (395 degrees C) and low CTE (8.9 ppm per degrees C), and is expected to be applied in organic light-emitting diode (OLED) displays.

引用

页码：16924 / 16930

页数：7

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