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Proceedings Paper

Low-frequency dielectric relaxation in liquid crystal-polymer composites
Author(s): L. Dolgov; Oleg V. Yaroshchuk; A. V. Koval'chuk; Diederik S. Wiersma
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Paper Abstract

The dielectric constants ε′ and ε″ of a series of "liquid crystal (LC) - polymer" composites in the frequency region 10-3-105 Hz are measured. The composites are prepared by a photo-separation method with the variation of polymer content from 0 to 50 weight %. For all samples, a relaxation effect with a low relaxation frequency (10-1-20 Hz) is observed. This effect is assigned to dielectric relaxation in the near-electrode layers. The experimentally observed increase of the relaxation frequency and the electric conductivity with polymer concentration is explained by incomplete phase separation occurred in "liquid crystal - pre-polymer" mixture under irradiation.

Paper Details

Date Published: 20 July 2004
PDF: 6 pages
Proc. SPIE 5507, XVI International Conference on Spectroscopy of Molecules and Crystals, (20 July 2004); doi: 10.1117/12.569819
Show Author Affiliations
L. Dolgov, Institute of Physics (Ukraine)
Oleg V. Yaroshchuk, Institute of Physics (Ukraine)
A. V. Koval'chuk, Institute of Physics (Ukraine)
Diederik S. Wiersma, Univ. of Florence (Italy)

Published in SPIE Proceedings Vol. 5507:
XVI International Conference on Spectroscopy of Molecules and Crystals
Galyna O. Puchkovska; Tatiana A. Gavrilko; Olexandr I. Lizengevich, Editor(s)

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