氢调法高MFR抗冲击共聚PP K9928H的结构与性能

摘要

采用偏光显微镜、旋转流变仪及毛细管流变仪等对用氢调法生产的高熔体流动速率(MFR)抗冲击共聚聚丙烯（PP）K9928H、进口同类PP及用可控流变法生产的PPK9928进行结构性能分析与评价。结果表明：K9928H的MFR接近或略低于进口同类PP，乙烯含量和乙丙橡胶含量高于进口同类PP，综合力学性能较好，外观、色泽正常，加工稳定性好；K9928H的重均分子量和相对分子质量分布（Mw/Mn）与进口同类PP接近，但其Mw/Mn大于K9928。%Properties and structure of impact copolymer polypropylene(PP)K9928H with high melt flow rate made via hydrogen as regulator,K9928 made via controllable rheological method and imported similar PP were analyzed and evaluated by polarized light microscope(PLM),rotational rheometer and capillary rheometer and other equipments. The results show that the melt flow rate of K9928H is close to or slightly lower than that of the imported similar PP,while the ethylene content and ethylene-propylene rubber content of K9928H is higher than those of the imported similar PP. K9928H has good mechanical properties,appearance and color and good processing stability. The weight average molecular mass and relative molecular mass distribution of K9928H are close to those of the imported similar PP,but the relative molecular mass distribution of K9928H is more than that of K9928.