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Molecular composites have been prepared by mixing rigid rod molecules of PPTA anion (K-salt) and poly(propylene oxide) in a common solvent and compression molding the precipitated material. As the PPTA anion content of the composites is increased, an upward shift occurs in both the glass transition temperature and the decomposition temperature. The tensile strength, stiffness and resistance to stress...
PPTA anion shows polyelectrolyte behaviour in solution and birefringence in film specimens, reflecting rigid conformation of backbone chains. The PPTA anion was blended with a flexible-coil polymer, poly(vinylpyridine) to make molecular composites. Optical clarity, polarizing optical microscopy, and dynamic mechanical thermal analysis all indicate the formation of homogeneous molecular composites...
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