Abstract
Blends of styrene-acrylic acid random copolymers (P(S-AA)) with poly(ethylene oxide) (PEO) have been studied. The copolymers contained up to 25 mol% AA monomers and the blends contained up to 60 wt% PEO. The presence of crystalline PEO in the blends is detected by DSC and verified by WAXS. EPR and DSC data indicate that pure polystyrene and PEO are immiscible in the temperature range 300-420K. The presence of two amorphous phases is detected for some blends based on a copolymer containing 5 mol% AA. The miscibility of the two components in the blends increases with increasing AA content of the copolymer.
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