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Lattice model of heterogeneous polymer chains in the liquid-crystalline state, 1 statistical properties

✍ Scribed by Gregory A. Medvedev; Yuli Y. Gotlib

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
592 KB
Volume
3
Category
Article
ISSN
1022-1344

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✦ Synopsis

Abstract

A heterogeneous lattice model for main‐chain liquid‐crystalline polymers is proposed. Phase transition parameters and statistical properties of the chain in the ordered phase are treated in the framework of a mean‐field approximation. The order parameters for the mesogen and the spacer bonds, the chain shape anisotropy and the fraction of stretched isomers are obtained. Dependence of the Curie point on the spacer length and flexibility is considered. The “odd‐even” effect is shown to increase drastically with the spacer flexibility. A strong dependence of the conformation changes in the ordered state on the spacer properties is obtained.

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