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Polyhydrazides and poly(1,3,4-oxadiazole)s with parabanic structures

✍ Scribed by Georgeta Caraculacu; Constantin Gaina; Viorica Gaina; Adrian A. Caraculacu; Ilie Diaconu

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 266 KB
Volume: 29
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(93)90323-8

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✦ Synopsis

Abstraet--Polyhydrazides with parabanic structures were prepared by polycondensation between a new monomer containing a preformed parabanic ring, viz. 1,3 p(bis-chloroformylphenyl) parabanic acid and dihydrazides. By thermal cyclization with polyphosphoric acid, the polyhydrazides were converted to poly(l,3,4-oxadiazole)s with parabanic structures. The films obtained from these polymers exhibit electrical insulating properties and good thermal stability.

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