COMPATIBILITY ENHANCEMENT OF ABS PVC BLENDS

The compatibilizing effect of poly(styrene-co-acrylonitrile) (SAN) who se acrylonitrile (AN) content is 25 wt % (SAN 25) in poly(acrylonitril e-co-butadiene-costyrene) (ABS)/poly(vinyl chloride) (PVC) blend was s tudied when the AN content of the matrix SAN in ABS was 35 wt % (SAN 3 5). When some amount of matrix SAN 35 was replaced by SAN 25 in a ABS/ PVC (50/50 by weight) blend, the mixed phase of SAN and PVC at the int erface was thickened, and about a twofold increase of impact strength was observed. The changes in morphology, dynamic mechanical properties , and rheological properties by the compatibilizing effect of SAN 25 w ere observed. (C) 1998 John Wiley & Sons, Inc.