Polypropylene (PP)/sisal fiber (SF) composites were prepared by using maleic anhydride-grafted polypropylene(PP-g-MAH) as an interfacial modifier,and the effect of fiber content on the flowability,combustion performance,and thermal and mechanical properties of the composites were investigated.The results indicated that the melt flow rates of the composites were reduced by 3.1 g/10 min with the addition of 30 wt ％ SF,but their Vicat softening points increased by 5.1 ℃,compared with pure PP.Moreover,their tensile strength and bending strength increased by 6.0 MPa and 20.7 MPa,respectively.In addition,there is a decrease in impact strength by 3.1 kJ/m2 for notched specimens and by 60 kJ/m2 for the unnotched ones.%研究了偶联处理后的剑麻纤维(SF)对聚丙烯(PP)性能的影响,以马来酸酐接枝聚丙烯(PP-g-MAH)作为界面相容剂,制备了PP/SF/PP-g-MAH复合材料,考察了改性SF含量对PP/SF/PP-g-MAH复合材料流动性能、热性能、燃烧性能和力学性能的影响.结果表明,当SF含量由零增加到30％(质量分数,下同)时,PP/SF/PP-g-MAH复合材料的熔体流动速率降低了3.1 g/10 min,维卡软化温度升高了5.1℃,拉伸强度升高了6.0 MPa,弯曲强度升高了20.7MPa,缺口冲击强度降低了3.1kJ/m2,无缺口冲击强度降低了60 kJ/m2.
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