Abstract
AbstractThe statistical–mechanical problem of the transition between crystalline and columnar phases in a main‐chain liquid–crystalline polymer is treated in a simple model in which only longitudinal motions of the polymer chains are permitted. A mean‐field approximation for the interchain potential is used to obtain a self‐consistent equation for the crystalcolumnar transition temperature. When applied to typical homopolymers this theory correctly predicts transition temperatures above the degradation temperature; when applied to a crude model of a random copolymer a temperature in the observed range is predicted.
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