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Liquid Crystal-Like Phase Separation in Systems of Macroscopic Rods

Published online by Cambridge University Press:  26 February 2011

Larry A. Chick ,
Christopher Viney  and
Ilhan A. Aksay
Larry A. Chick
Affiliation:
Battelle Pacific Northwest Laboratory, P.O. Box 999, Richland, WA 99352
Christopher Viney
Affiliation:
Department of Materials Science and Engineering FB-10, and the Advanced Materials Technology Program, University of Washington, Seattle, WA 98195
Ilhan A. Aksay
Affiliation:
Department of Materials Science and Engineering FB-10, and the Advanced Materials Technology Program, University of Washington, Seattle, WA 98195
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Abstract

Experiments with monolayers of macroscopic rods indicate separation into isotropic and aligned phases at greater-than-critical concentrations. This behavior is qualitatively similar to that of rodlike liquid crystalline polymers, which in turn has been modelled successfully in threedimensions by Flory and Ronca. We have adapted their approach to predict the ordering of rods in two dimensions. A preliminary phase diagram is presented. The critical rod concentration at which an aligned phase can appear first is a decreasing function of rod axial ratio. Rods of a given axial ratio will phase separate at lower overall concentrations in two dimensions than in three.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 134: Symposium J – Materials Science and Engineering of Rigid-Rod Polymers , 1988 , 27
Copyright
Copyright © Materials Research Society 1989

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References

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