摘要:木塑復合材料是利用熱塑性塑料，像聚乙烯、聚丙烯、聚氯乙烯以及它們的共聚物作為基體材料，從中加入木粉來達到增強效果的一類新型復合材料。但是木粉與熱塑性樹脂的相容性較差，加工困難。本論文通過改變木塑復合材料中的木粉含量來研究木粉用量對木塑復合材料的力學和其他性能的影響。實驗結果表明：隨著木塑復合材料中的木粉含量的增加，復合材料的拉伸、彎曲、熱變形溫度等力學性能得到改善；而木塑復合材料的剪切稀化程度隨木粉的含量的增加而增加，其流動性卻隨之降低。除此之外，本論文還通過加入PP-g-MAH來進一步提高木塑復合材料的綜合性能，研究了PP-g-MAH的加入對木塑材料的力學性能及其他性能的影響。結果表明：PP-g-MAH的加入顯著提高了木塑材料的力學性能，而隨著PP-g-MAH的加入，木塑材料的剪切稀化程度以及流動性能的變化程度不大。

關鍵詞：高密度聚乙烯；木粉；馬來酸酐；流變性能；力學性能

Abstract：Wood flour composites is a kind of new materials， which is made of thermoplastic plastic， just like polyethylene， polypropylene， polyvinyl chloride and copolymers as matrix materials fixing with wood to enhance performance. However， the polarity berween wood flour and thermoplastic resin are different， so the compatibility of them was bad. In this research， high density polyethylene/wood flour composites to modify their mechanical and rheology properties were studied. With the experiment we draw a conclusion that the mechanical properties of composite materials such as tensile， bending， impact and heat deflection temperature were improved as wood flour dosage was increased； The degree of shear thinning of  the melting of HDPE/wood flour composites was also improved while the flow properties of composites was reduced. In addition PP-g-MAH was used as adhesive to investigate the effect on mechanical and rheology properties of composite materials. Results showed that PP-g-MAH could improve the mechanical properties of composites obviously ， the degree of shear thinning of the melting of HDPE/wood flour composites had little change as PP-g-MAH dosage was increased and the flow properties of composites was basically unchanged.

Key words: high density polyethylene；wood flour；maleic anhydride；rheological propert；mechanical properties