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Synthesis and phase behaviour of new carbazole containing liquid crystal side chain polysiloxanes
Author(s) -
Arnim Volkmar v.,
Finkelmann Heino,
Dobarro Alicia,
Velasco Dolores
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021970911
Subject(s) - side chain , carbazole , alkyl , mesogen , polymer , liquid crystal , moiety , materials science , polymer chemistry , phase (matter) , crystallography , chemistry , stereochemistry , organic chemistry , liquid crystalline , composite material , optoelectronics
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.