MISCIBILITY AND MORPHOLOGY OF BLENDS OF AS RANDOM COPOLYMER AND GRAFT COPOLYMER AS-g-PBd

The miscibility and morphology of blends of acrylonitrile(A)-styrene(S) random copolymer (abbreviated as AS) and graft copolymer (abbreviated as AS-g-PBd) are studied. It is held that the morphology of the blends is governed predominantly by the molecular weight ratios of AS copolymer to graft chain g-AS, and also affected by the match of chemical composition of the two components of blends. The changing of the morphologies of the dispersed phases, from rubbery component occluded domains of plastics to alternate concentric spherical shells, then to exclusive rubbery component, shows that the miscibility of AS copolymer and AS-g-PBd is improved stepwise.