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New poly(amide-imide)s syntheses, 14. Preparation and properties of poly(amide-imide)s based on 3, 3-bis[4-(4-trimellitimidophenoxy)phenyl]-1-oxoisoindoline

✍ Scribed by Chin-Ping Yang; Jiun-Hung Lin

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
480 KB
Volume
196
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

An imide ring‐containing dicarboxylic acid, 3,3‐bis[4‐(4‐trimellitimidophenoxy)phenyl]‐1‐oxoisoindoline, was prepared via condensation of 3,3‐bis[4‐(4‐aminophenoxy)phenyl]‐1‐oxoisoindoline and trimellitic anhydride. A series of new aromatic bis(phenoxy)‐1‐oxo‐isoindoline‐containing poly(amide‐imide)s were prepared via direct polycondensation of this diimide‐diacid with various aromatic diamines using triphenyl phosphite and pyridine as condensing agents in N‐methyl‐2‐pyrrolidone (NMP) in the presence of calcium chloride. Most of the resulting polymers are of amorphous nature and readily soluble in polar solvents such as NMP and N,N‐dimethylacetamide. All soluble poly(amide‐imide)s afford transparent, flexible, and tough films. The glass transition temperatures of the polymers are in the range of 267–305°C and show almost no weight loss up to 450°C in nitrogen atmosphere. The properties of 1‐oxoisoindoline containing poly(amide‐imide)s are compared with those of the corresponding analogous poly(amide‐imide)s derived from 3,3‐bis[4‐(4‐trimellitimidophenoxy)phenyl]phthalide.

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