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Preparation of Poly(1,3,4-oxadiazole-2,5-diyl-1,2-vinylene) via Anionic Mechanism

✍ Scribed by Ruifeng Zhang; Rainer Jordan; Oskar Nuyken

Publisher: John Wiley and Sons
Year: 2003
Tongue: English
Weight: 82 KB
Volume: 24
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.200390035

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✦ Synopsis

Abstract

2,5‐Bis(chloromethyl)‐1,3,4‐oxadiazole was synthesized and dehydrohalogenation of this model compound was investigated under various base conditions. The formation of an intermediate with quinodimethane‐type structure is suggested for reaction in EtONa/EtOH. Polymerization of this intermediate proceeds via an anionic mechanism to form poly(1,3,4‐oxadiazole‐2,5‐diyl‐1,2‐vinylene). Polymerization at a toluene/water interface results in shorter polymerization times, milder conditions, higher molecular weights, higher yields and fewer defects in the polymer as compared to the corresponding polycondensation route.

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