原位增容HDPE/木纤维复合材料研究

In-situ compatibilization of HDPE/wood fiber composites

通过反应挤出的方法制备原位增容HDPE/木纤维(WF)复合材料,研究马来酸酐(MA)和苯乙烯(St)用量对复合材料的力学性能和微观结构的影响。结果表明:随着MA用量的增加,原位增容HDPE/WF复合材料的冲击和拉伸性能先增加后减小,当MA用量为1.5 phr时达到最大值,与无增容的HDPE/WF复合材料相比,最大分别提高了143%和45%;St的用量对HDPE/WF复合材料的力学性能表现出相似的影响规律,当St与MA的摩尔比为1.5:1时,HDPE/WF复合材料的冲击和拉伸强度与没有添加St的复合材料相比分别增加了112%和39%;扫描电子显微镜(SEM)分析显示,原位增容HDPE/WF复合材料的界面粘合与无增容复合材料的相比有明显改善。

In-situ compatibilized HDPE/wood fibre （WF） composites were prepared by reactive extrusion. Effects of maleic anhydride （MA） and styrene （St） on mechanical properties and microstrueture of HDPE/WF composites were investigated. The results show that the tensile and impact strength of in-situ compatibilized HDPE/WF composites first increased then decreased with the content of MAincreased, and reached the maximum when the content of MA was 1,5 phr, showing an increase of 143% and 45% respectively compared with those of the composite without compatibilization. St exhibited a similar trend of influence on mechanical properties of the HDPE/ WF composite. When the molar ration of St to MA was 1.5 ： 1, the tensile and impact strength of the HDPE/WF composite increasedby 112% and 39% respectively in comparison with those of the composite without the addition of St. The scanning electron microscopy （SEM） results show that the in-situ compatibilized HDPE/WF composite has an enhanced interfacial adhesion.