| Acrylonitrile-Butadiene-Styrene (ABS) graft copolymer was synthesized by emulsion polymerization. Transparent ABS resin was achieved by blending the ABS graft copolymer with PMMA/SAN matrix resin. The properties, morphology and grafted chains behaviors of PMMA/SAN/ABS blends were investigated. The effects of rubber content, the ratio of St/AN in graft SAN copolymer, and matrix composition on structure and performance of transparent ABS resin also were investigated. Methylmethacrylate-butadiene-styrene (MBS) impact modifier with different microstructure was synthesized by emulsion polymerization, the mechanical properties, optical properties and morphology of PMMA/SAN/ABS blends was studied.The results showed that with the increase of the ratio of PMMA/SAN, the toughness of PMMA/SAN/ABS blends slightly decreased, the transmittance first increased and then decreased, and tensile strength was not dependent of the ratio of PMMA/SAN. The evolution of impact strength of the blends was similar with the tendency of grafted degree (GD) with the increase of CHP and TDDM. From TEM, it was found that ABS graft copolymers uniformly dispersed in PMMA/SAN matrix. The impact strength of the blend increased, and the transmittance was slightly reduced with the increasing of the rubber content of the blend. Toughness and transparency of the blend with the ratio of St/AN of 75/25 were better. With the increase of matrix composition the impact strength was not varied and the transmittance was increased and then decreased. TEM showed that the rubber particles with St/AN of 75/25 were dispersed well in the matrix. For the ABS graft copolymer with different core-shell ratio, the transparency of the blends was gradually increases with the PB increased, while the impact strength was larger at the core-shell ratio of 40/60 and 60/40. For the MBS impact modifier with different microstructure almost have no effect on the transparency and mechanical properties of the PMMA/SAN/ABS blends. |
PDF Full Text Request