Abstract: PA6 was grafted with styrene/maleic anhydride copolymer (PA6-g-SMA）and was subsequently blended with poly vinyl chloride (PVC) via melt blending. The effect of grafting ratio of PA6-g-SMA on morphology and mechanical properties of PVC/PA6-g-SMA blends were discussed. A good compatibility between PA6-g-SMA and PVC was identified. With increasing grafting ratio of PA6, the decreasing domain size of PA6-g-SMA and enhanced toughening and reinforcing on PVC was observed. When the graft ratio was 5.12 %, the addition was 15 %, the impact strength of the blend was 64.7 kJ/m2 , the tensile strength of the blend was 55 MPa.

Key words: poly(vinyl chloride), polyamide 6 grafted styrene-maleic anhydride, morphology, mechanical property