Abstract

Thermal analysis of the PEO/PMMA system show for the blends with higher molecular weight PMMA two glass transition temperatures in the 75–80 w/w% PMMA range. Thermal treatment is accompanied by a shift of this composition range of two Tg to lower PMMA contents. On the other hand observed melting point depression in the 0–60 w/w% PMMA range indicate compatibility of the blend components. Small negative interaction parameters approaching zero with increasing PMMA content of the blend, support the possible incompatibility in the observed composition range of two Tg.

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