将粒径分别为 32 5目和 15 0 0目的CaCO3 粒子按照不同比例进行级配混合 ,并以质量分数为 30 %的填充比例填充聚丙烯 .通过对不同温度下的聚丙烯填充复合体系剪切粘度的测定 ,以阿累尼乌斯公式对上述结果进行处理 ,发现经过合理的级配可以有效地提高填充复合体系的流动活化熵 ,同时体系的流动活化能将有所上升 ,从能量的角度上解释了以往发现的级配对聚合物复合材料体系粘度的降低作用的机理 .还从颗粒填料的级配堆积作用的角度上对流动活化熵的降低原因作了进一步的理论解释 . The CaCO3 particles with particle size of 32 5 mesh and 150 mesh respectively were graded and mixed according to different proportions and were filled with polypropylene at the mass fraction of 30% .After the polypropylene composite system was sheared at different temperatures Viscosity was measured by the Arrhenius formula to deal with the above results and found that after a reasonable gradation can effectively improve the flow of the filled composite system activation entropy, while the system of flow activation energy will be increased from the energy point of view The mechanism of decreasing the viscosity of graded polymer composites was explained in the past, and the reason of the reduction of the entropy of flow activation was further explained theoretically from the perspective of graded packing of granular filler.