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Radical polymerization of ring-substituted trans-cinnamonitriles and formation of ladder spin polymer

✍ Scribed by Hitoshi Tanaka; Yoshimasa Kikukawa; Maki Sataki; Tsuneyuki Sato; Tadatoshi Ota

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
365 KB
Volume
195
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The polymerization of ring‐substituted trans‐cinnamonitriles has been studied with radical initiators such as peroxides and azo compounds at 60–130°C. 3,4,5‐Trimethoxycinnamonitriles (3,4,5‐MOCN) yield a homopolymer with a molecular weight of about 10^4^ in contrast to the unsubstituted cinnamonitrile. The activation energy of the 3,4,5‐MOCN polymerization is 106 kJ/mol and the polymerization rate is proportional to the 0,45th power of the initiator concentration. Radical copolymerization of 3,4,5‐MOCN yields copolymers with vinyl monomers such as styrene and acrylonitrile. ESR studies suggested that the primary radical from an azo initiator attacks at the olefinic carbon of the cinnamonitrile bearing the cyano group. Heating of the 3,4,5‐MOCN homopolymer produces a ladder spin polymer with hydroaniline units in the main chain.

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