关键词: 聚碳酸酯, 热塑性聚氨酯弹性体, 耐化学, 抗菌, 缺口冲击强度

Abstract: The chemica-resistant and antibacterial polycarbonate （PC）/polyurethane elastomer （TPU） blends were prepared through melt blending using PC， TPU， and antibacterial agents as raw materials. The effects of the amount， hardness， type of TPU and type of antibacterial agent on the properties of the blends were systematically studied. The results indicated that the processing fluidity， notched impact strength and chemical resistance of the blends increased with an increase in the TPU content. Compared to the polyether?type TPU， the polyester?type TPU with a high hardness is more advantageous to improving the notched impact toughness and chemical stability of the blends. When 0.6 wt% active ZnO was added， the PC/TPU blends obtained an antibacterial rate of over 99.9 % against Escherichia coli and Staphylococcus aureus.

Key words: polycarbonate, thermoplastic polyurethane elastomer, chemical resistance, antibacterial, notched impact strength