不同相容剂对聚丙烯/甘蔗渣复合材料力学性能的影响

Effects of Compatibilizers on Mechanical Properties of Polypropylene/Bagasse Composite

利用熔融接枝法制备了5种大分子相容剂,用于聚丙烯/甘蔗渣(PP/BF)复合材料,以改善甘蔗渣纤维与聚合物基体间的界面粘接。考察了相容剂种类与含量对PP/BF复合材料力学性能的影响。结果表明,相容剂在改善PP/BF复合材料的界面相容性上起到重要作用,在5种大分子相容剂中,PP-g-MAH对体系有较好的增强作用,而乙烯-辛烯无规共聚物接枝马来酸酐(POE-g-MAH)对体系的增韧效应显著。两种相容剂在其用量为10%时分别达到最佳改性效果,与未添加相容剂的复合材料相比,前者使PP/PP-g-MAH/BF复合材料的拉伸强度提高了16.6%,后者使PP/POE-g-MAH/BF复合材料的缺口冲击强度增加了640%。

Five kinds of macromolecular compatibilizer were prepared via melt grafting method. They were used in polypropylene/boagasse （PP/BF） composite in order to improve the interracial adhesion between bagasse fibers and PP matrix. The effects of compatibilizer type and content on mechanical properties of PP/BF composites were investigated. The results indicate that compatibilizer plays an important role in improving the interracial compatibility of PP/BF composites. Among these five compatibilizers, maleated polypropylene （PP-g-MAH） has the best effect on the enhancemnet of the tensile strength, while maleic anhydride grafted ethylene-l-octene copolymer （POE-g-MAH） has the significant toughening effect on the PP/BF composites. The composites show the best propertiest when the content of compatibilizers is 10%. Compared with that of the PP/BF composites without compatibilizer, the tensile strength of PP/PP-g-MAH/BF system increases by 16.6 %, the impact strength of PP/POE-g-MAH/BF composites increases by 640 %.