Measurement of the Domain Growth Kinetics in Multidomain Nematic Liquid Crystal Polymers by Means of the Worm Like Path Model for Multiple Scattering
作者:
S.J. Picken,
R.J. Van Wijk,
J.W. Th. Lichtenbelt,
J.B. Westerink,
P.J. Van Klink,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 261,
issue 1
页码: 535-547
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508033496
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The rate of domain growth in nematic side chain polymer samples is measured using the worm like path model for multiple scattering of light. The worm like path model which describes multiple scattaering in terms of the optical persistence length is found to apply both to multiple scattering in liquid crystal polymer films as well as to model polystyrene despersions. The required value of the optical persistence length can be calculated from the single scattering process so that there are no adjustable parameters in this model. The rate of domain growth in liquid crystal polymer samples is found to obey a scaling law where the growth exponent is about 0.85, contrary to the expected value of ½. In addition, an unexpected effect of the layer thickness on the rate of growth is observed, even for layer thickness much larger than the domain size.
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