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Syntheses of Polyamides and Polypyrrolones from 2,2′-Disubstituted Bis(3-buten-4-olides) and Diamines by Mitsuru Ueda; Masahiko Yabuuchi; Yoshio Imai is a Materials Science article available to read on EtoBox.

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## Abstract The ring‐opening polyaddition of 2,2′‐disubstituted bis(3‐buten‐4‐olides) with aliphatic diamines in __m__‐cresol at room temperature afforded in quantitative yields polyamides with a pendant ketone moiety having inherent viscosities of up to 0.7. On the other hand, the polymerization in __m__‐cresol at 80°C with acidic catalysts and at 160°C without any catalyst yielded directly polypyrrolones, a novel class of polyheterocycles. The cyclodehydration of the open‐chain polyamides to polypyrrolones was also achieved by simply treating the polyamide films with methanolic hydrochloric acid at room temperature. Both of the polymers were generally soluble in hot polar solvents such as dimethylformamide, __m__‐cresol, and nitrobenzene. The polypyrrolones began to lose weight gradually at around 250°C in nitrogen as determined by thermogravimetric analysis, while the thermograms in air showed an appreciable weight increase at about 230°C.

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Author

Mitsuru Ueda; Masahiko Yabuuchi; Yoshio Imai

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley (ISSN 0360-6376)

Published

1977

Language

EN

Field

Materials Science (Physical Sciences)