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Preparation and properties of new soluble aromatic polyamides from 2,2′-bis(4-aminophenyl)biphenyl and aromatic dicarboxylic acids

✍ Scribed by Guey-Sheng Liou; Masaki Maruyama; Masa-Aki Kakimoto; Yoshio Imai

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
141 KB
Volume
36
Category
Article
ISSN
0887-624X

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✦ Synopsis

New biphenyl-2,2Ј-diyl-containing aromatic polyamides having a crank and twisted noncoplannar structure were synthesized in inherent viscosities of 0.39 -1.42 dL/g by the low-temperature solution polycondensation of 2,2Ј-bis(4-aminophenyl)biphenyl, prepared in four steps starting from 2-aminobiphenyl, with various aromatic dicarboxylic acid chlorides. These polyamides were readily soluble in a variety of solvents including N,N-dimethylacetamide, N-methyl-2-pyrrolidone (NMP), m-cresol, and pyridine. Transparent, pale-yellow, and flexible films could be cast from the NMP solutions of the polyamides. The aromatic polyamides had glass transition temperatures in the range of 284 -320°C, and began to lose weight around 400°C, with 10% weight loss being recorded at about 500°C in air.

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