中文摘要：

为研究β-晶对碳酸钙填充PP复合材料力学性能的影响，该文采用负载β-成核剂的纳米碳酸钙（β-CC）混合纳米碳酸钙（CC）或微米碳酸钙（WC）填充PP制备了β-PP复合材料及其PP-g-MA、POE-g-MA和EVA-g-MA作为相容剂的增容复合材料。力学性能研究结果表明，随着CC和WC用量增加，PP拉伸强度降低、模量提高；β-CC填充PP复合材料模量提高，拉伸强度变化不大。PP-g-MA增容提高填充PP复合材料拉伸强度、杨氏模量和冲击强度；POE-g-MA增容明显提高冲击强度，EVA-g-MA增容降低拉伸性能。β-CC/PP复合材料冲击强度随着β-CC用量增加而提高，β-CC/CC/PP和β-CC/WC/PP冲击强度高于CC/PP（w（CC）/w（PP）＝5/95）和WC/PP（w（WC）/w（PP）＝5/95）复合材料归结于高韧性β-晶形成。

英文摘要：

In order to investigate the influence of β-phase on the mechanical properties of CaCO3/poly-propylene （CaCO3/PP）composites,β-PP composites were prepared by PP filled with the mixture of nano-CaCO3 （CC）supported with β-nucleating agent （β-CC）and CC or micro-CaCO3 （WC）.Using PP-g-MA,POE-g-MA and EVA-g-MA as compatibilizers,the compatibilized composites were also pre-pared.The results indicated that the tensile strength of PP composites decreased and tensile modulus in-creased with increasing the content of CaCO3 .Addition ofβ-CC increased tensile modulus of PP and had no influence on the tensile strength of PP.Compatibilization of PP-g-MA increased the tensile strength, tensile modulus and impact strength of filled PP composites.Compatibilization of POE-g-MA significantly increased the impact strength of filled PP composites.Compatibilization of EVA-g-MA decreased the ten-sile properties of filled PP composites.The impact strength of β-CC/PP composites increased with in-creasing the content ofβ-CC and the impact strength ofβ-CC/CC/PP and β-CC/WC/PP were higher than those of CC/PP（w（CC）/w（PP）=5/95 ）and WC/PP（w（WC）/w（PP）=5/95 ）,due to the for-mation ofβ-phase.