中文摘要：

固定植物纤维和高密度聚乙烯比例为4：6，在一定挤出工艺条件下，制备植物纤雏／高密度聚乙烯复合材料，研究偶联剂含量对稻草／高密度聚乙烯复合材料和玉米秸秆／高密度聚乙烯复合材料力学性能的影响。结果表明：偶联剂质量分数为3％时，复合材料的弯曲强度较好，稻草／高密度聚乙烯的弯曲强度提高了50．92％，除去秸叶和秸穰的玉米秸秆／高密度聚乙烯的弯曲强度提高了66．69％；偶联剂质量分数为6％时，复合材料的拉伸强度较好，稻草／高密度聚乙烯的拉伸强度提高了19．44％，除去秸叶和秸穰的玉米秸秆／高密度聚乙烯复合材料的拉伸强度提高了35．18％。

英文摘要：

An experiment was conducted to make plant fiber/HDPE composites in terms of a fiber/HDPE ratio of 4：6 under proper extrusion techniques. The effects of coupling agent content on the mechanical properties of straw/HDPE composite and corn stalk/HDPE composite were studied. Results show that the bending strength is better when the coupling agent content is 3%, and the bending strengths of straw/HDPE composite and corn stalk/HDPE composite without leaves increase by 50.92% and 66.69%, respectively. The tensile strength is preferable at a coupling agent content of 6%, and tensile strengths of straw/ HDPE composite and corn stalk/HDPE composite without leaves increase by 19.44% and 35.18%, respectively.