目的 介绍成核剂对国内外等规聚丙烯(iPP)改性的研究进展，使材料的透明性及冲击性能都有所提高。方法 从透明改性、增韧改性、透明和增韧协同改性等3个方面详细讨论改性方法和机理，并指出相应的研究进展。结果 在透明改性方面，多采用添加α成核剂的方法改善iPP的透明性，并对聚合物的结晶温度、透光率等进行深入探讨；在增韧改性方面，多采用β成核剂改善iPP的冲击性能，并对iPP的冲击强度进行研究。为了使iPP的透明性、冲击性能均有所提高，可采用α/β成核剂协同改性。结论 α/β成核剂复配会使iPP的透明性达到80%～90%，iPP的冲击强度也得到不同程度的提高。

It introduces the research progress of isotactic polypropylene (iPP) modification with nucleating agent and aims to improve the transparency and impact strength of materials. Modification methods and mechanism were discussed in details from transparency modification, toughening modification, synergistic modification of the two. And the current research progress was pointed out. In terms of transparency modification, α-nucleating agent was added to improve the transparency of iPP. The temperature and light transmittance were researched in depth. In the toughening modification aspect, β-nucleating agent was adopted to improve the impact properties of iPP and its impact strength was studied. To improve the transparency and impact properties of iPP, synergistic modification of α/β nucleating agents could be used. In conclusion, the compound of α/β nucleating agents will increase the transparency of iPP to 80%~90%, and improve its impact strength to some degree.