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A Liquid-Crystalline Co-Polysiloxane with Asymmetric Bent Side Chains

✍ Scribed by Alexej Bubnov; Vladimíra Novotná; Damian Pociecha; Miroslav Kašpar; Vĕra Hamplová; Giancarlo Galli; Milada Glogarová

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
484 KB
Volume
212
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

A co‐polysiloxane has been prepared with an asymmetric bent side group based on a liquid‐crystalline monomer showing a B~2~ (SmCP) phase. In order to dilute the side chain mesogens along the polymer backbone, octyl side chains were also incorporated. X‐ray studies confirmed that the resulting co‐polysiloxane exhibits a liquid‐crystalline layered phase, the siloxane polymer chains being microphase segregated from the incompatible side chain mesogens. The mesophase of polymer exhibits a homeotropic structure that can be successfully aligned by unidirectional shear. This phase does not exhibit polar switching under an applied electric field unlike the bent‐core monomer used as the side chains of this polymer. This can be caused by the homeotropic alignment of the polymer samples. magnified image

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