文章研究了α成核剂CH-6N、HPN-715、TMP-7与β成核剂TMB-5四种不同类型成核剂以及不同类型成核剂复配对聚丙烯力学性能、光学性能及结晶性能的影响。结果表明：成核剂均能有效提高结晶温度与结晶度。α成核剂CH-6N增刚改性效果最好，CH-6N添加量0.2%，聚丙烯的弯曲模量为2 390 MPa，弯曲强度为60.6 MPa。α成核剂会降低聚丙烯韧性，添加0.2% CH-6N，聚丙烯的冲击强度仅为2.7 kJ/m²。β成核剂TMB-5可有效提高聚丙烯韧性，但会降低刚性。0.1% TMB-5增韧效果最好，聚丙烯的冲击强度为20.7 kJ/m²，拉伸断裂伸长率为530%。光学性能方面，α成核剂CH-6N改性效果最好，0.1% CH-6N加入后聚丙烯黄色指数仅为0.46。α成核剂与β成核剂复配改性聚丙烯，既能有效提高聚丙烯的韧性，又能改善其刚性，可达到刚韧平衡。0.1% CH-6N与0.1% TMB-5复配改性效果较好，聚丙烯的冲击强度达5.5 kJ/m²，弯曲模量为2 140 MPa，拉伸强度为41.1 MPa。

In this paper, the effects of four different types of nucleating agents, namely, α-nucleating agent CH-6N, HPN-715, TMP-7 and β-nucleating agent TMB-5, as well as the effects of compounding of different types of nucleating agents on the mechanical, optical and crystalline properties of polypropylene were investigated. The results show that the nucleating agent can effectively increase the crystallization temperature and crystallinity. α-nucleating agent CH-6N has the best rigidity effect. The bending modulus and bending strength of polypropylene are 2 390 MPa and 60.6 MPa respectively with the addition of 0.2% CH-6N. The α nucleating agent can reduce the toughness of polypropylene. Adding 0.2% CH-6N, the impact strength of polypropylene is only 2.7 kJ/m². The β-nucleating agent TMB-5 can effectively improve the toughness of polypropylene, but reduce the rigidity. The toughening effect of 0.1 % TMB-5 is the best. The impact strength of polypropylene is 20.7 kJ/m², and the elongation at break is 530%. In terms of optical properties, α nucleating agent CH-6N has the best modification effect, and after the addition of 0.1% CH-6N, the yellow index of polypropylene is only 0.46. The combination of α nucleating agent and β nucleating agent can not only improve the toughness of polypropylene, but also improve its rigidity, and achieve the balance of rigidity-toughness. The compound modification effect of 0.1% CH-6N and 0.1% TMB-5 is good, and the impact strength of polypropylene is 5.5 kJ/m², the bending modulus is 2 140 MPa, and the tensile strength is 41.1 MPa.