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Liquid-crystalline main-chain elastomers

✍ Scribed by Gerd H. F. Bergmann; Heino Finkelmann; Virgil Percec; Mingyang Zhao

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
518 KB
Volume
18
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

A main‐chain elastomer was synthesized for the first time by a cross‐linking hydrosilylation of a cyclosiloxane with a new main‐chain liquid crystalline semiflexible polyether. Imposing a uniaxial mechanical field to the unstretched nematic polydomain sample results in a macroscopic alignment of the director. For this process the sample has to be stretched by a factor of about 5, which considerably exceeds the effect observed for nematic side‐chain elastomers.

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