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Lattice model of heterogeneous polymer chains in the liquid‐crystalline state, 1 statistical properties
Author(s) -
Medvedev Gregory A.,
Gotlib Yuli Y.
Publication year - 1994
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.1994.040030110
Subject(s) - mesogen , lattice (music) , polymer , materials science , anisotropy , phase transition , mean field theory , chain (unit) , condensed matter physics , thermodynamics , lattice model (finance) , liquid crystalline , physics , composite material , astronomy , acoustics , quantum mechanics
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.