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Miscible Blends Of A Thermotropic Liquid Crystalline Polymer And Sulfonated Polystyrene Ionomers, Robert Weiss, Y. Ghebremeskel, L. Charbonneau
Miscible Blends Of A Thermotropic Liquid Crystalline Polymer And Sulfonated Polystyrene Ionomers, Robert Weiss, Y. Ghebremeskel, L. Charbonneau
Robert Weiss
The miscibility of a wholly aromatic thermotropic liquid crystalline polyester (LCP), Vectra® A, with lightly sulfonated polystyrene ionomers (SPS) was assessed. Blends were prepared by melt mixing in an intensive mixer. The sulfonation level and the choice of the cation used to neutralize the ionomer influenced miscibility. Zinc salts of an SPS with 5.3 mol% sulfonation were miscible at all compositions with the LCP, but lithium salts with the same sulfonation level formed two phases, a pure LCP phase and an ionomer-rich mixed phase. Zinc salts of an ionomer with 10.8 mol% sulfonation were also miscible with the LCP when …