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Side chain functionalized liquid crystalline polymers and blends, 1. Reentrant nematic phase formation in hydrogen‐bonded blends of liquid crystalline functionalized copolymers with a low molecular weight non‐mesogeic dopant
Author(s) -
Barmatov Evgueni,
Filippov Alexander,
Andreeva Larisa,
Barmatova Marina,
Kremer Friedrich,
Shibaev Valery
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(19991001)20:10<521::aid-marc521>3.0.co;2-m
Subject(s) - liquid crystal , materials science , dopant , copolymer , phase (matter) , polymer chemistry , polymer , side chain , polymer blend , chemical engineering , doping , organic chemistry , composite material , chemistry , optoelectronics , engineering
Hydrogen‐bonded blends based on smectic comb‐shaped functionalized LC copolymers containing alkyloxy‐4‐hydroxybenzoic acid fragments (proton donor) and the low molecular weight dopant 4‐(4‐pyridyloyl)cyanobenzoate (proton acceptor) were obtained. It was observed that blends containing 10–25 mol‐% of low molecular weight dopants form a reentrant nematic phase (SmA‐RN‐SmA‐I). The blend behavior in the magnetic field was studied, and the orientational elastic constants of the RN phase were determined.