Nano-meter CaCO_3/EPR/PP composite was prepared by means of twin-roll mixing and extruding. The relation of the impact properties with the storage period of the composite was studied.

• 采用双辊混炼和挤出制样的方法制备了纳米碳酸钙(CaCO_3)/乙丙橡胶(EPR)/聚丙烯(PP)复合材料,研究了复合材料的冲击强度与试样放置时间的关系。