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Existence of Two Different Isotropic Phases as a Reason for Bistable Phase Behavior of an LC Side‐Chain Polymethacrylate
Author(s) -
Polushin Sergey,
Rogozin Viacheslav,
Beloborodov Ilya,
Rjumtsev Evgeny,
Kozlovsky Mikhail
Publication year - 2008
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.200700638
Subject(s) - mesophase , isotropy , birefringence , side chain , bistability , phase (matter) , materials science , liquid crystal , phase transition , polymer , composite material , optics , polymer chemistry , condensed matter physics , chemistry , organic chemistry , physics , optoelectronics
An isotropic melt of a chiral side‐chain polymethacrylate was studied by electric birefringence technique. A phase transition between two different isotropic phases was detected by Kerr effect and confirmed by WAXS measurements. The obtained experimental data can explain the previously reported bistable phase behavior of the polymer, as conventional Sm A phase is formed in slow cooling whereas a TGB‐like, optically isotropic mesophase in fast cooling.