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Photo‐induced alignment of a photo‐crosslinkable liquid‐crystalline copolymer film by linearly polarized UV light
Author(s) -
Kawatsuki Nobuhiro,
Suehiro Chieko,
Shindo Hiroshi,
Yamamoto Tohei,
Ono Hiroshi
Publication year - 1998
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/marc.1998.030190408
Subject(s) - copolymer , mesogen , materials science , birefringence , monomer , irradiation , linear polarization , anisotropy , photochemistry , liquid crystal , polymer chemistry , optoelectronics , optics , liquid crystalline , polymer , chemistry , composite material , laser , physics , nuclear physics
Abstract The anisotropic photoreaction of a liquid‐crystalline (LC) copolymer comprising one co‐monomer being anisotropically photo‐crosslinkable by linearly polarized (LP)‐UV light and the other being insensitive to UV‐irradiation is presented. Polarized UV and IR studies suggested a photo‐induced alignment of the mesogenic side groups during the LP‐UV photoreaction at the LC temperature range of the copolymer. The direction of the aligned mesogenic groups is parallel to the electric vector of the incident LP‐UV light and the induced birefringence is 0.07.