Synthesis of thermotropic polybenzoxazole using 3-amino-4-hydroxybenzoic acid

被引：18

作者：

Ali, Mohammad Asif ^{[1
]}

Shimosegawa, Hiroshi ^{[1
]}

Nag, Aniruddha ^{[1
]}

Takada, Kenji ^{[1
]}

Kaneko, Tatsuo ^{[1
]}

机构：

[1] Japan Adv Inst Sci & Technol, Grad Sch Adv Sci & Technol, Energy & Environm Area, 1-1 Asahidai, Nomi, Ishikawa 9231292, Japan

来源：

JOURNAL OF POLYMER RESEARCH | 2017年 / 24卷 / 12期

关键词：

Polybenzoxazoles; 3-amino-4-hydroxybenzoic acid (3; 4-AHBA); Liquid crystalline; Isophthalic acid; Uvitic acid; ITACONIC ACID; BIOPOLYAMIDES; POLYIMIDES;

D O I：

10.1007/s10965-017-1362-9

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Bio-based polybenzoxazoles (PBOs) are prepared by polycondensation of diacid monomer derived from 3-amino-4-hydroxybenzoic acid with a series of aliphatic diamines. Resulting bio-based PBOs have high weight average molecular weight ranging 5.70-7.20 x 10(4) g/mol and show ultrahigh thermal resistance with T-10 values over 400 degrees C and T-g values over 170 degrees C, which are higher than those of conventional bio-based polymers, polyamides 11 (around 60 degrees C) or poly(lactic acid) (56 degrees C). Especially hydrazide group of the bio-based PBO were cyclized to form diazole ring by annealing at 330 degrees C for 20 min. The resultant PBO show liquid crystalline (LC) behavior to spin fiber in a melting state. The resultant PBO fibers showed high values of Young's modulus and mechanical strength as compared with conventional polymers polyamide 11 and poly(lactic acid) (PLA).

引用

页数：7

共 18 条

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