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Photochromism of 4‐cyanophenylazobenzene in liquid crystalline‐coil AB diblock copolymers: the influence of microstructure
Author(s) -
Moriya Keiichi,
Seki Takahiro,
Nakagawa Masaru,
Mao Guoping,
Ober Christopher K.
Publication year - 2000
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 - 10.1002/1521-3927(20001201)21:18<1309::aid-marc1309>3.0.co;2-1
Subject(s) - copolymer , photochromism , materials science , polystyrene , polymer , polymer chemistry , isoprene , microstructure , phase (matter) , lipid microdomain , chemical engineering , composite material , chemistry , organic chemistry , nanotechnology , membrane , biochemistry , engineering
The UV and V spectral features of an AB diblock copolymer composed of polystyrene and a poly(1,2 & 3,4)isoprene‐based polymer with a pendant liquid crystalline 4‐cyanophenylazobenzene (Az) group in comparison with those of a corresponding LC polyisoprene homopolymer are reported. The orientational and photochromic behavior of an AB diblock copolymer in thin films shows distinct differences from that of a corresponding Az homopolymer. This can be attributed to the influence of the phase separated polymer coil microdomain of polystyrene in the AB block copolymer film.