Abstract
AbstractSpecific interactions in binary blends of poly(vinyl chloride) (PVC) with ethylene–vinyl acetate copolymers (EVA) and ethylene‐methyl acrylate copolymers (EMA) were investigated by observation of band shifts of the carbonyl absorption using ATR‐FTIR spectroscopy at variable temperature. Blends of PVC with EVA and EMA could be prepared as heterogeneous, homogeneous or metastable homogeneous mixtures, depending on the copolymer composition. The miscible systems as well as the heterogeneous ones showed only very small or no band shifts. The metastable blends exhibited shifts of several wave numbers to lower values, which vanished at higher temperatures as the blends demixed. Strong interactions in the metastable blends could be related to good impact properties of the corresponding two‐phase systems.
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