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Holographic-polymer-dispersed liquid crystals doped with poly(vinyl carbazole)–fullerene
Article first published online: 21 MAY 2008
DOI: 10.1002/app.28375
Copyright © 2008 Wiley Periodicals, Inc.
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How to Cite
Kim, E. H., Woo, J. Y. and Kim, B. K. (2008), Holographic-polymer-dispersed liquid crystals doped with poly(vinyl carbazole)–fullerene. Journal of Applied Polymer Science, 109: 3108–3113. doi: 10.1002/app.28375
Publication History
- Issue published online: 2 JUN 2008
- Article first published online: 21 MAY 2008
- Manuscript Accepted: 6 MAR 2008
- Manuscript Received: 23 DEC 2007
Funded by
- National Core Research Center Program of the Ministry of Science & Technology
- Korea Science & Engineering Foundation
- Abstract
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Keywords:
- crosslinking;
- glass transition;
- modulus;
- phase separation;
- polyurethanes
Abstract
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