Liquid crystal polymers. 17. Thermotropic properties of random copolyesters of monotropic and enantiotropic polymers

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Abstract
A series of random copolyesters containing two different aromatic ester triads and a decamethylene flexible spacer was prepared and characterized for the effect of comonomer composition on glass, crystalline and liquid crystalline state properties. The homopolymer of one of the triads was enantiotropic, but the other was not. However, a copolymer containing 90 mol% of the latter units and 10 mol% of the former showed thermotropic behaviour, which suggested that the latter homopolymer was probably monotropic. The effects of comonomer content on glass, melting and isotropization temperatures of the copolymers were very different for the three transitions.

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