A facile synthesis of soluble polyimides with high glass transition temperature and excellent mechanical properties due to intermolecular hydrogen bonds

被引：6

作者：

Li, Ke ^{[1
]}

Zhou, Lan ^{[1
]}

Wu, Simin ^{[1
]}

Yu, Qiyu ^{[1
]}

Yang, Long ^{[2
]}

机构：

[1] Sichuan Univ Sci & Engn, Coll Mat Sci & Engn, Zigong, Sichuan, Peoples R China

[2] Southwest Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China

来源：

HIGH PERFORMANCE POLYMERS | 2020年 / 32卷 / 03期

关键词：

Soluble polyimide; high glass transition temperature; excellent mechanical properties; RIGID-ROD; ORGANOSOLUBLE POLYIMIDES; BENZIMIDAZOLE; POLYBENZIMIDAZOLE; DIANHYDRIDE; POLYAMIDES; DIAMINE; BULKY;

D O I：

10.1177/0954008319861141

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

An unsymmetrical heterocyclic diamine monomer containing proton donor (-NH-), 2-(4-aminophenyl)-5-aminobenzimidazole (PABZ), which can form hydrogen bond interactions with carbonyl functional group, was copolymerized with 4,4 '-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 2,2 '-bis(trifluoromethyl)-4,4 '-diaminobiphenyl (TFMB) through two-step synthetic methods to obtain a series of homo- and co-polyimide (PI). The corresponding homo- and co-PI both exhibited good solubility in aprotic polar solvents, such as N,N-dimethylacetamide, N-methyl-2-pyrrolidone, N,N-dimethylformamide, pyridine, and dimethyl sulfoxide. In addition, the PI-containing PABZ units showed excellent tensile strength ranging from 83 to 164 MPa, 130-260% higher than 6FDA/TFMB homo-PIa films. These PIs, especially PABZ/6FDA, showed very high glass transition temperatures, 430 degrees C.

引用

页码：316 / 323

页数：8