中文摘要：

为了改善超高分子量聚乙烯（PE-UHMW）的加工性能，提高其力学性能，以木粉和碳纤维为填料，制备了高填充量碳纤维增强PE—UHMW／木粉复合材料。研究了碳纤维含量对PE-UHMW／木粉复合材料弯曲性能、拉伸性能及动态热机械性能的影响。研究结果表明，加入碳纤维可提高PE-UHMW／木粉复合材料的弯曲强度及拉伸强度。拉伸强度和弯曲强度都随着碳纤维的含量的增加呈现出先增加后减小的趋势。当碳纤维质量分数为3％时，弯曲强度达到最大值，为25．2MPa，比未加碳纤维时提高了46．5％。当碳纤维质量分数为2％时，弯曲强度达到最大值，为38．4MPa，比未加碳纤维时提高了27．1％。随着碳纤维含量的增加，复合材料的储能模量显著提高。碳纤维的加入使复合材料的损耗因子峰值增大。

英文摘要：

In order to improve the processing properties and mechanical properties of ultra high molecular weight polyethylene（PE-UHMW）, the wood powder and carbon fibers were used as the filled materials. High filler content PE-UHMW/ wood powder composites were prepared by mixed melt extrusion method. The effect of carbon fiber content on flexural properties, tensile properties and dynamic mechanical properties of the composites were investigated. The results show that the flexural strength and tensile strength of the composites are improved by adding carbon fibers. With the increasing of carbon fiber content, tensile strength and flexural strength of the composites are increased first and then decreased. When the mass fraction of carbon fiber is 3%, flexural strength of the composite reaches the maximum value（25.2 MPa）, which is improved by 46.5% than that of composite without carbon fibers. When the mass fraction of carbon fibers is 2%, the tensile strength of the composite reaches the maximum value（38.4 MPa）, which is improved by 27.1% than that of the composite without carbon fibers. With the increase of the content of carbon fibers, storage modulus of the composite is improved significantly. Carbon fibers can increase loss factor peaks of the composites.