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Molecular design and synthesis of novel side‐chain liquid crystalline polymers
Author(s) -
Kawakami Yusuke
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940840120
Subject(s) - mesogen , oxetane , side chain , polymer , siloxane , materials science , cationic polymerization , polymerization , polymer chemistry , liquid crystal , liquid crystalline , composite material , optoelectronics
Novel side‐chain liquid crystalline polymers were synthesized based on the molecular design of the chemical structures of main‐chain, spacer, and mesogenic groups. The main‐chain structures are polyether, by the cationic ring‐opening polymerization of oxetane derivatives, and polydiene, by the radical polymerization of diene derivatives. Some of the polymers from oxetanes with various mesogen and spacer groups show smectic liquid crystalline phase. Both cyano‐ and fluorine‐substituted biphenyls are good mesogenic groups in these liquid crystalline polymers. Polydiene also acts as a novel main‐chain to give smectic liquid crystalline state with cyanobiphenyl or fluorobiphenyl as a mesogen. Not only oligomethylene groups but also siloxane and oligo(oxyethylene) groups act as a component of the spacer groups to give liquid crystalline state.