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在聚丙烯中(PP)中添加马来酸酐(MAH)和共单体苯乙烯(St),通过熔融挤出法制备了高接枝率的PP-g-(MAH-St),红外光谱分析证明St和MAH成功接枝到PP主链上。研究了PP-g-(MAH-St)对PP/木粉复合材料力学性能的影响,并用扫描电镜观察了复合材料冲击断面的微观形貌。结果表明,与现有PP-g-MAH相比,只要添加少量PP-g-(MAH-St)就能有效改善PP/木粉复合材料的界面相容性,从而提高复合材料的力学性能;PP-g-(MAH-St)中MAH的接枝率对复合材料力学性能影响显著,当MAH接枝率为2.8%时,复合材料的力学性能达到最佳。
PP-g- (MAH-St) with high grafting degree was prepared by melt extrusion method by adding maleic anhydride (MAH) and co-monomer styrene (PP) into PP. It proved that St and MAH were successfully grafted onto the PP backbone. The effect of PP-g- (MAH-St) on the mechanical properties of PP / wood flour composites was investigated. The microstructure of PP / wood flour composites was observed by scanning electron microscopy. The results show that compared with the existing PP-g-MAH, the addition of a small amount of PP-g- (MAH-St) can effectively improve the interfacial compatibility of the PP / wood flour composites to improve the mechanical properties of the composites. The grafting degree of MAH in PP-g- (MAH-St) has a significant effect on the mechanical properties of the composites. When the graft ratio of MAH is 2.8%, the mechanical properties of the composites achieve the best.