Droplets Formation in UV Cured Polymer Dispersed Liquid Crystals
作者:
S.Di Bella,
L. Lucchetti,
F. Simoni,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 320,
issue 1
页码: 139-148
ISSN:1058-725X
年代: 1998
DOI:10.1080/10587259808024390
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Film morphology and electro-optical behaviour of Polymer Dispersed Liquid Crystals (PDLC) made by the standard mixture NOA 65/E7 have been studied for different exposure times and intensities of UV curing light. Special attention has been devoted to the study of the effects of curing parameters on film morphology, which were analysed by means of scanning electron microscopy (SEM). UV intensity has been proved to play an important role in the phase separation process. It affects not only liquid crystal droplets size, but also the morphological uniformity of PDLC samples and the extent to which phase separation is complete. A simple interpretation based on the temperature dependence of the free energies involved in the curing process is proposed. As we expected electro-optical responses show to be strictly related to film morphology.
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