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Functional Photochromic Methylhydrosiloxane‐Based Side‐Chain Liquid‐Crystalline Polymers
Author(s) -
TóthKatona Tibor,
Cigl Martin,
FodorCsorba Katalin,
Hamplová Věra,
Jánossy István,
Kašpar Miroslav,
Vojtylová Terezia,
Hampl František,
Bubnov Alexej
Publication year - 2014
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.201300729
Subject(s) - side chain , photochromism , azobenzene , liquid crystal , polymer , monomer , benzophenone , birefringence , polymer chemistry , materials science , phase (matter) , chemistry , photochemistry , organic chemistry , optics , optoelectronics , physics
A new azobenzene‐group‐containing monomer and several respective functional side‐chain polymers grafted on a methylhydrosiloxane backbone (with two different degrees of polymerization; with and without the addition of a photoreactive benzophenone derivative) are designed, synthesized, and characterized. The resulting materials clearly show self‐assembly behavior and possess a nematic liquid‐crystal phase over a broad temperature range, which extends below 0 °C. The optical properties of these new photochromic liquid‐crystalline materials are determined from the absorbance spectra of oriented samples and by photoinduced birefringence studies. The results indicate a considerable dichroism of the side‐chain liquid‐crystalline polymers (SCLCPs), and hence demonstrate their potential applicability for optical storage.