研究旨在利用不同粒径滑石粉增强改性聚乙烯（PE），探究不同粒径（小粒径777A，大粒径T84）滑石粉掺量对PE复合材料力学性能及耐热性能的影响。结果表明：掺入不同粒径滑石粉制备PE复合材料，有效改善了PE复合材料的工作性能、力学性能和耐热性能。当777A和T84滑石粉掺量为15%时，所制备的PE复合材料的熔体流动速率分别为5.93、6.01 g/10 min，表观密度分别为1.011、1.128 g/cm³，拉伸强度分别为28.21、29.56 MPa，维卡软化温度分别为89、92 ℃。较大粒径的T84滑石粉制备的PE复合材料的改善效果最优。

The aim of this study was to investigate the effects of different particle sizes (small particle size 777A, large particle size T84) of talc powder on the mechanical properties and heat resistance performance of PE composites by enhancing modified polyethylene (PE) with different particle sizes of talc powder. The results showed that the working properties, mechanical properties and heat resistance performance of PE composites were effectively improved by adding different particle sizes of talc powder. When the content of 777A and T84 talc powder was 15%, the melt flow rate of the PE composites prepared by them were 5.93, 6.01 g/10 min, respectively, the apparent densities were 1.011, 1.128 g/cm³, respectively the tensile strength were 28.21, 29.56 MPa, respectively, and the Vicat softening temperature were 89, 92 ℃, respectively. The improvement effect of PE composites prepared by T84 talc powder with larger particle size is the best.