聚丙烯（PP）塑料是1种性能优异、应用广泛的材料。在PP塑料的二次回收利用过程中，其力学强度、热稳定性和抗老化性能仍有待进一步提高。因此，研究采用废弃的PP塑料，并通过简单的熔融塑化和再冷却的方法制备了滑石粉填充的PP共混物。添加滑石粉后，滑石粉中的—OH基团和PP碳链上的—CH₃基团之间形成了氢键，使滑石粉填充的PP共混物的力学性能较原始PP塑料显著提升。当滑石粉的含量为10%时，其断裂能相比原始的PP塑料提高了近142%。因此，在二次回收利用PP塑料的过程中添加适量的滑石粉有助于进一步提升PP共混物的性能。

Polypropylene (PP) is a widely used material with excellent properties. The mechanical strength, thermal stability, wettability, and anti-aging properties of PP can be further improved, especially for secondary recycled PP. Therefore, the study aimed to improve the properties of PP by waste PP and preparing talc-filled PP blends via a simple melt plasticization and re-cooling process. Through the addition of talc, hydrogen bonds were formed between the —OH groups in talc and the —CH₃ groups on the PP carbon chain, resulting in a significant improvement in mechanical properties compared to virgin PP. The addition of 10% talc increased the fracture energy of the blends by nearly 142%. Therefore, the addition of talc in the secondary recycling of PP can effectively improve the performance of PP blends and enhance their sustainability in practical applications.