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Preparation of amphotropic liquid crystalline poly(alkoxycarbonylphenylene)s
Author(s) -
Kaeriyama Kyoji,
Kouyama Seiichi,
Sekita Mitsutoshi,
Nakayama Tadahiro,
Tsukahara Yasuhisa
Publication year - 1999
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19990201)20:2<50::aid-marc50>3.0.co;2-s
Subject(s) - thermotropic crystal , condensation polymer , bromide , polymer chemistry , triphenylphosphine , phenylene , alkoxy group , materials science , liquid crystal , alkyl , liquid crystalline , catalysis , chemistry , polymer , organic chemistry , composite material , optoelectronics
Poly(alkoxycarbonylphenylene)s with long alkoxy groups were prepared by dehalogenative polycondensation of alkyl dichlorobenzoates with nickel bromide/zinc/triphenylphosphine catalyst. The poly(alkoxycarbonyl‐ p ‐phenylene)s and poly(alkyloxycarbonyl‐ m ‐phenylene)s are liquid crystalline, although the latter are composed wholly of kinked repeating units. While poly(hexyloxycarbonylphenylene)s exhibit only thermotropic liquid crystalline behavior, poly(dodecyloxycarbonylphenylene)s and poly(hexadecyloxycarbonylphenylene)s show amphotropism.