中文摘要：

用化学发泡法注塑成型制备了木纤维／PP复合微孔发泡材料。研究了木纤维掺量对木纤维，PP复合微孔发泡材料力学性能、密度及微孔结构的影响。结果表明，木纤维的添加使得材料的力学性能显著提高，且木纤维／PP复合微孔发泡材料的冲击强度和弯曲强度要高于未发泡材料，而未发泡材料的拉伸强度要高于木纤维／PP复合微孔发泡材料；复合材料的密度随着木纤维掺量的增加而增大，且发泡材料的密度小于未发泡材料的密度；随着木纤维掺量的增加，木纤维／PP复合微孔发泡材料的泡孔直径先减小后增加，木纤维掺量为5％时，泡孔直径达最小，为20．5μm。

英文摘要：

The wood fibre/PP microcellular foamed wood plastic composite （WPC） was prepared by chemically foaming injection molding method. The effects of wood fibre content on the mechanical properties,the density of the foamed WPC and the microcellular structure of microcellular foams were investigated. The results showed that the mechanical properties of WPC were improved significantly and the impact strength and the bending strength of wood fibre/PP microcellular foamed WPC were higher than no foam composite,but the tensile strength of wood fibre/PP microcellular foamed WPC was lower than no foams. The density of composites increased with increasing of wood fibre content, and the density of the wood fibre/PP microcellular foamed WPC was less than the density of no foam composite. With the increasing of wood fibre content,the cell diameter of composites first decreased then increased. When the content of wood fibre was 5%, the cell diameter of the composites could obtain the minimal value which was 20.5 μm.