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.