目的 拟在利用天然可降解高分子替代部分聚丙烯(PP)制备一种新型复合材料。方法 采用聚丙烯作为复合材料的基质，向基质中加入魔芋葡甘聚糖(KGM)、碳酸钙(CaCO3)，并按照一定比例通过桌面挤出机混溶挤出制粒，再将半成品颗粒利用注塑机注塑成型制备成PP/KGM/CaCO3复合材料，同时探究KGM、CaCO3对PP/KGM/CaCO3复合材料的冲击性能和拉伸性能的影响。结果通过单因素实验可知，当KGM体积分数为10%、CaCO3体积分数为5%时，PP/KGM/CaCO3复合材料的力学性能最优。结论 该复合材料相互融合程度较好，抗冲击和伸强度较高，安全系数较好，可应用于食品包装和生活用品行业领域。本研究可为KGM的资源化利用提供一定的参考依据。

The work aims to prepare a new type of composites by utilizing natural degradable polymer to replace part of polypropylene (PP). Polypropylene was used as the matrix of the composites. Konjac glucomannan (KGM) and calcium carbonate (CaCO3) were added to the matrix, and the pellets were mixed and extruded through a desktop extruder in a certain ratio. Then the semi-finished pellets were prepared into PP/KGM/CaCO3 composites by injection molding with an injection machine. Finally, the effects of KGM and CaCO3 on the impact properties and tensile properties of PP/KGM/CaCO3 composites were investigated. Through the one-factor experiment, it could be seen that the mechanical properties of PP/KGM/CaCO3 composites were optimal when the addition of KGM was 10% and CaCO3 was 5%. It is concluded that the composite have better degree of mutual integration, higher impact and tensile strength, better safety factor, and can be applied in the food packaging and household goods industry. This study can provide some reference basis for the resource utilization of KGM.