Study On The Properties Of PA6/ABS Alloy

In this paper, PA6/ABS blends were prepared by blending PA6(polyamide6) and ABS (acrylonitrile-butadiene-styrene) resins. And the ABS resins were prepared in situ by blending SAN resins (acrylonitrile-styrene copolymer) and ABS graft copolymer. The effect of the amount of ABS resins and rubber content in ABS resins on the properties of PA6/ABS blends were investigated in the same processing conditions. SAM resins (styrene-acrylonitrile-maleic anhydride copolymer) were introduced into the blends to replace part of the SAN resins. The effect of SAM resins content on the properties of blends was investigated. The results indicated that the blends with50wt%-60wt%ABS resins showed optimum properties. The tensile strength, elastic modulus, bending strength and bending modulus of blends decreased with the increment of rubber content in ABS resins. Tensile and bending performance of blends first decreased, then increased with the increment of SAM resins content in SAN resins. But the melt flow rates of blends decreased with the increment of SAM resins content. Difference of blending sequence with SAM resins showed little effect on mechanical properties of PA6/ABS blends.Different content of maleic anhydride(MA) were graft copolymerized onto ABS graft copolymer to prepare ABS-g-MA by seeded-emulsion polymerization.The graft copolymerization of MA onto ABS graft copolymer were confirmed by FRIR.The ABS-g-MA graft copolymer was blended with PA6in Thermo Haake rheometer. The effect of the amount of graft copolymer on the impact strength and rheological behavior was investigated. The effect of the content of maleic anhydride in the graft copolymer on the performance of the blends were investigated when the rubber content of blends were18%. The results showed that the torque and impact strength of blends increased with the increase of the amount of ABS-g-MA copolymer. The impact strength increased with the increase of the amount of maleic anhydride in ABS-g-MA graft copolymer. But bending strength, bending modulus, elastic modulus and elongation at break of blends reached maximum at the maleic anhydride content of1.0%.