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Synthesis and phase behaviour of new carbazole containing liquid crystal side chain polysiloxanes

✍ Scribed by Volkmar v. Arnim; Heino Finkelmann; Alicia Dobarro; Dolores Velasco

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
759 KB
Volume
197
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

A series of chiral mesogenic side chain polymers containing a carbazole unit have been synthesized and investigated with regard to their liquid crystal (1c) phase behaviour. The carbazole units are linked either via the 2‐position with a 1‐oxycarbonyl‐4‐alkoxylphenyl moiety (end‐on) or via the 9‐position with an alkyl chain (side‐on) to polymethylsiloxane. Only end‐on polymers with long spacers or a ratio bigger one of spacer length and the free lateral alkyl chain length exhibit stable or metastable smectic phases. The side‐on polymers are only isotropic or crystalline.

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