engleski

Structure-Property Relationships in Polyurethane-Poly(styrene-co-acrylonitrile) Blends

Blends of thermoplastic polyurethane (TPU) and poly(styrene-co-acrylonitrile) (SAN)polyurethane ionomer (PUI) with SAN were prepared in the melt. The structural properties and morphology of the blends were investigated. TPU and SAN were immiscible in the composition range 30-70 wt % of TPU or SAN. In TPU-rich blends, SAN propagates the separation of hard and soft segments in TPU. In SAN-rich blends, the interaction stage depends on acrylonitrile contents. SEM measurements showed that the blends of TPU/SAN were fine dispersions and clearly showed a continuous and disperse phase, whereas the morphology of the PUI/SAN blends were different.

blends; polyurethane; poly(styrene-co-acrylonitrile); structure-property relationships

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