Synthesis and properties of new soluble aromatic polyamides and polyimides on the basis of N,N′-bis(3-aminobenzoyl)-N,N′-diphenyl-1,4-phenylenediamine
Journal
Journal of Polymer Science, Part A: Polymer Chemistry
Journal Volume
40
Journal Issue
15
Pages
2564-2574
Date Issued
2002
Author(s)
Hsiao, S.-H.
Abstract
Abstract A new N ‐phenylated amide ( N ‐phenylamide) unit containing aromatic diamine, N , N ′‐bis(3‐aminobenzoyl)‐ N , N ′‐diphenyl‐1,4‐phenylenediamine, was prepared by the condensation of N , N ′‐diphenyl‐1,4‐phenylenediamine with 3‐nitrobenzoyl chloride, followed by catalytic reduction. Two series of organosoluble aromatic poly( N ‐phenylamide‐imide)s and poly( N ‐phenylamide‐amide)s with inherent viscosities of 0.58–0.82 and 0.56–1.21 dL/g were prepared by a conventional two‐stage method and the direct phosphorylation polycondensation, respectively, from the diamine with various aromatic dianhydrides and aromatic dicarboxylic acids. All polyimides and polyamides are amorphous and readily soluble in many organic solvents such as N , N ‐dimethylacetamide and N ‐methyl‐2‐pyrrolidone. These polymers could be solution cast into transparent, tough, and flexible films with high tensile strengths. These polyimides and polyamides had glass‐transition temperatures in the ranges of 230–258 and 196–229 °C, respectively. Decomposition temperatures of the polyimides for 10% weight loss all occurred above 500 °C in both nitrogen and air atmospheres. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 2564–2574, 2002
SDGs
Type
journal article