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Abstract
A series of chiral thermotropic liquid crystalline co-bipolyesters based on linear and non-linear aromatic cores and an optically active (S)-1,2-propanediyl spacer are studied by X-ray diffraction analysis, Complementary differential scanning calorimetry data are presented. It is found that different polymorphs exist in the solid phase, depending on copolymer chemical composition and thermal history. The occurrence of a cholesteric mesophase is demonstrated in copolymers containing non-linear units up to as high as 70%.