中文摘要：

利用柔和法制备三元乙丙橡胶（EPDM），纳米碳酸钙（nano—CaC03）N．N出物，再分别用两步法和分级注入法与聚丙烯（PP）熔融共混制备PP／EPDM／nano—CaCO3复合材料。当w（EPDM）为25．5％时，分级注入法制备的复合材料形成了分散相EPDM中包覆PP相的多重包覆结构：当w（EPDM）大于16．5％时．分级注入法能明显降低EPDM粒子直径，使EPDM粒子形状规则，分散均匀；两步法制备的复合材料结晶温度和储能模量均比分级注入法高，说明两步法中有更多的nano—CaCO3粒子从EPDM相迁移到PP相中，这与扫描电子显微镜分析结果基本一致。

英文摘要：

The authors prepared pre-extrudate of ethylene-propylene-diene terpolymer（EPDM）/nano-calcium carbonate（nano-CaCO3） by mild mixing method, and then synthesized polypropylene（PP）/EPDM/nano-CaCO3 composite with two-step extrusion or lateral injection extrusion method, respectively. A complex structure of EPDM particles as dispersed phase which contain PP phase was observed in the composite prepared with lateral-injection extrusion method when mass content of EPDM reached 25.5%. The lateral-injection extrusion method endowed the EPDM particles with smaller diameter, regular shape and homogeneous distribution when EPDM content was 16.5%. The crystallization temperature and storage modulus of the composite prepared with two-step extrusion method were higher than those of its counterpart made with the lateral extrusion method, this fact accounted for the migration of nano-CaCO3 particles from EPDM phase into PP phase, as confirmed by the observation of scanning electron microscope.