✦ LIBER ✦

Preparation, properties and crosslinking of cyano-substituted polyester, polyurethanes and epoxy resin derived from 1-(2,2-dicyanovinyl)-3,4-dihydroxybenzene

✍ Scribed by Constantinos D. Diakoumakos; John A. Mikroyannidis

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 711 KB
Volume: 31
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(94)00144-8

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✦ Synopsis

Abstraet-I-(2,2-Dicyanovinyl)-3,4-dihydroxybenzene was synthesized from the condensation of 3,4-dihydroxybenzaldehyde with malononitrile and used as a starting material for the preparation of a novel class of cyano-substituted polyesters, polyurethanes and epoxy resins. In addition, model compounds were synthesized and their spectroscopic data were correlated with those of the corresponding polymers. The polyester showed an enhanced solubility in common organic solvents and higher thermal stability after heat-curing compared with the reference polyester synthesized from I ,2-dihydroxybenzene. The crosslinked polymers obtained from polyester and polyurethanes upon curing at 300'C for 20 hr were stable up to 385-4OOC in Nz or air and afforded anaerobic char yields of 6468% at 800°C. The synthesized epoxide was polymerized in the presence of 4,4'-diaminodiphenylsulfone.

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