The synthesis and characterization are reported of three new classes 1-3 of chiral thermotropic polyesters containing the 4,4′-(terephthaloyldioxy)dibenzoyl mesogen and various chiral segments. In all cases the stability of the mesophase was fairly high and its nature could be varied depending on the structure and chirality of the spacer segment. Mesomorphic polymorphism was also detected in some samples, including ordered-type smectic structures.
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Chiellini et al. (1990) studied this question.
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