Model System for Liquid Crystal Polymer Blends

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Abstract
Copolymers which contain 2-hydroxy- 6-naphthoic acid and p-hydroxybenzoic acid, differing only in comonomer ratios, have been used as a model system for blends in which both of the component materials are capable of forming liquid crystalline phases. The rheological behavior suggests that not all of the blends behave the same in the anisotropic melt. Solid state data which was obtained using DSC, DMTA, X-ray, and optical methods is interpreted in terms of miscibility of the component materials. Calculations, based on Windle's sequence matching calculations, have been performed to explain the observed DSC transition temperatures in the blends