PE-UHMW/PP共混物的流动、力学与耐磨损性能研究

Study on Flow,Mechanical and Wear Resistance Properties of PE-UHMW/PP Blend

将均聚型聚丙烯(PP)、耐磨助剂与超高分子量聚乙烯(PE-UHMW)共混,制备了PE-UHMW/PP共混物,研究了PP含量及耐磨助剂对PE-UHMW/PP共混物流动、力学与耐磨损性能的影响。结果表明,PP能有效地改善PE-UHMW的流动性能,PE-UHMW/PP共混物的维卡软化点和热变形温度均随PP含量的增加而增加;加入耐磨助剂后,当PP的质量分数为50%时,共混物的拉伸强度达到最大,但断裂伸长率最小,且随PP含量的增加,PE-UHMW/PP共混物的冲击性能降低;PP降低了PE-UHMW的耐磨损性能,加入耐磨助剂后保持了PE-UHMW的高耐磨损性能且对共混物的流动和力学性能影响不大。

Ultra high molecular weight polyethylene （PE-UHMW） / polypropylene （PP） blend was prepared by mixing PP, wear resistance agent and PE-UHMW, the effects of PP content and wear resistance agent on the flow, mechanical and wear resistance properties of PE-UHMW/PP blend were studied. The results showed that PP could improve the fluid performance of PE- UHMW effectively, the heat deflection temperature and Vicar softening temperature of the blend Were improved with the increase of PP content. After adding the wear resistance agent, when the mass fraction of PP was 50%, the tensile strength of the blend was maximum, but the elongation at break was minimum, and the impact property of the blend decreased with the increase of PP content. PP decreased the wear resistance property of PE-UHMW, but the addition of wear resistance agent could retain the high wear resistance property of PE-UHMW and had no effects on the flow and mechnical properties of the blend.