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Thermal and ferroelectric properties of two series of coloured chiral liquid crystalline side group copolymers
Author(s) -
Niesel Frank Thomas,
Rübner Joachim,
Springer Jürgen
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021961218
Subject(s) - mesogen , copolymer , pendant group , azobenzene , side chain , ferroelectricity , monolayer , bilayer , polymer , materials science , polymer chemistry , liquid crystal , phase (matter) , crystallography , chemistry , liquid crystalline , organic chemistry , nanotechnology , membrane , dielectric , biochemistry , optoelectronics
Two series of liquid crystalline side group copolymethacrylates were synthesized and their thermal and ferroelectric properties determined. All copolymers contain the same azobenzene mesogen spaced from the backbone by a heptamethylene sequence but different chiral co‐compounds were used. The samples show either a monolayer or a bilayer smectic C* phase but only four polymers with a low content of the azo‐dye could be switched ferroelectrically. The formation of the smectic C* phase of some samples was found to be hindered. In order to study this phenomenon as a function of the molecular weight one copolymer was fractionated.