Abstract
A new highly phenylated diamine, 3,4-bis(4-aminophenyl)-2,5-diphenylthiophene, was synthesized in three steps starting from 4′-nitrodeoxybenzoin. New aromatic polyamides containing tetraphenylthiophene unit were prepared by the low temperature solution poly-condensation of this diamine with various aromatic dicarboxylic acid chlorides. These polyamides had inherent viscosities of 0.20—0.35 dl g−1 and were generally soluble in various organic solvents such as N,N-dimethylacetamide, N-methyl-2-pyrrolidone, and dimethyl sulfoxide. The glass transition temperatures of the polyamides ranged from 285 to 327°C, and the 10% weight loss temperatures were observed above 530°C in nitrogen.
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Jeong, HJ., Kobayashi, A., Kakimoto, Ma. et al. Synthesis and Characterization of Novel Aromatic Polyamides from 3,4-Bis(4-aminophenyl)-2,5-diphenylthiophene and Aromatic Dicarboxylic Acids. Polym J 26, 99–103 (1994). https://doi.org/10.1295/polymj.26.99
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DOI: https://doi.org/10.1295/polymj.26.99