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Preparation and properties of new aromatic polyamides from 4,4′-diaminotriphenylamine and aromatic dicarboxylic acids

✍ Scribed by Yoshiyuki Oishi; Hiroko Takado; Masaru Yoneyama; Masa-Aki Kakimoto; Yoshio Imai

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
337 KB
Volume
28
Category
Article
ISSN
0887-624X

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✦ Synopsis

Abstract

New aromatic polyamides (aramids) having inherent viscosities of 0.5–2.6 dL/g were prepared by the direct polycondensation of 4,4′‐diaminotriphenylamine with various aromatic dicarboxylic acids in N‐methyl‐2‐pyrrolidone using triphenyl phosphite and pyridine as condensing agents. These aramids were amorphous and soluble in a variety of solvents such as N,N‐dimethyl‐acetamide, dimethyl sulfoxide, and pyridine, and afforded transparent and tough films by solvent casting. The glass transition temperatures of these aramids were in the range of 280–310°C, and the 10% weight loss temperatures were above 430°C in air.

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