SYNTHESIS OF 4,4'-ISOPROPYLIDENE DIPHENOL (BISPHENOL-A) BASED POLYBENZOXAZOLES VIA AN ACID-CATALYZED SOLUTION CYCLIZATION PROCESS

被引：17

作者：

JOSEPH, WD

MERCIER, R

PRASAD, A

MARAND, H

MCGRATH, JE

机构：

[1] VIRGINIA POLYTECHN INST & STATE UNIV,DEPT CHEM,BLACKSBURG,VA 24061

[2] VIRGINIA POLYTECHN INST & STATE UNIV,BLACKSBURG,VA 24061

来源：

POLYMER | 1993年 / 34卷 / 04期

基金：

美国国家科学基金会;

关键词：

POLYBENZOXAZOLE; BISPHENOL-A; SYNTHESIS; ACID CATALYSIS; SOLUTION PROCESS; SEMICRYSTALLINE POLYMER;

D O I：

10.1016/0032-3861(93)90375-K

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polybenzoxazoles were successfully prepared from bisaminophenols based upon 4,4'-isopropylidene diphenol (bisphenol A) and terephthaloyl chloride and optionally isophthaloyl chloride monomers. The successful 'one-pot' process involves a low-temperature polycondensation followed by an acid-catalysed solution cyclization reaction. The fully cyclized copolymers were isotropic in nature, displayed glass transition temperatures as high as 300-degrees-C, and formed tough films when prepared from m-cresol. Semicrystallinity could be developed in the 100% terephthaloyl chloride polybenzoxazole (PBO) system when annealed 40-degrees-C above its T(g). Characterization of the fully cyclized materials was demonstrated via the aid of spectroscopic and solution characterization techniques. The process is also amenable to higher-performance PBO systems.

引用

页码：866 / 869

页数：4

共 14 条

[1] SUBSTITUTION REACTIONS OF HEXOESTROL AND ANALOGOUS COMPOUNDS [J].