Effects of Addition of Glass Bead on the Rheology of Immiscible Polymer Blend Polypropylene/Poly(Acrylonitrile-co-Styrene)

A series of polypropylene/poly(acrylonitrile-co-styrene)/glass bead composite (PP/SAN/GB) was prepared using ratio of PP/SAN70/30(weight) via melt blend method.From the SEM picture,we found that the miscibility of this blend is very poor and GB trends to load in SAN phase.The results from ARES rotational rheometer show that the rheology of PP/SAN/GB composite is strongly dependent on the content and location of GB.At low content of GB,the introducing of GB does not change the rheology of PP/SAN blend.As the content of GB reaches a critical value (15 phr),dynamic storage modulus and complex viscosity of PP/SAN/GB composite begin to increase remarkably.The composites including GB treated by KH550 coupling agent have higher dynamic storage modulus and complex viscosity.