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Holographic‐polymer‐dispersed liquid crystals doped with poly(vinyl carbazole)–fullerene
Author(s) -
Kim Eun Hee,
Woo Ju Yeon,
Kim Byung Kyu
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28375
Subject(s) - materials science , polymer , liquid crystal , carbazole , chemical engineering , acrylate , phase (matter) , vinyl polymer , doping , polymer chemistry , polymer blend , fullerene , composite material , copolymer , organic chemistry , chemistry , optoelectronics , engineering
The effects of poly(vinyl carbazole) (PVK) doped to a poly(urethane acrylate) matrix in holographic‐polymer‐dispersed liquid crystals were studied. With the addition and increasing amounts of PVK, the driving voltage and rising time of the films decreased because of the increased effective local electric field across the liquid crystal (LC) droplet. Off‐state diffraction efficiency was increased with the addition and increasing amounts of PVK presumably because of the increased elasticity of the polymer matrix, which augmented the phase separation of the polymer and LC by effectively squeezing the LC molecules out of the polymer matrix. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008