Abstract
The effects of polymolecularity and heterogeneity of the chemical structure of the flexible fragments on the conditions of formation and the order parameter of mixed liquid crystal systems are discussed, using aromatic polyesters with mesogenic and flexible fragments in the main chain as examples. It is shown that at close values of the temperature ranges over which liquid crystal order of the mixed components of different molecular weight exists, the order parameter of the mesogenic fragments of the mixture in the liquid crystal state is less than the corresponding values for homopolymers. In the case of a mixture of components with a flexible fragment of different length and the same mesogenic fragments, the components of the system are completely incompatible in the liquid crystal state.
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