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首页> 外文期刊>Polymer engineering and science >Fatigue Life of Coir Fiber Reinforced PP Composites: Effect of Compatibilizer and Coir Fiber Contents
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Fatigue Life of Coir Fiber Reinforced PP Composites: Effect of Compatibilizer and Coir Fiber Contents

机译：椰壳纤维增强聚丙烯复合材料的疲劳寿命：相容剂和椰壳纤维含量的影响

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摘要

The fatigue behavior of polypropylene/coir fiber composites was investigated. Composites were prepared according to an experimental statistical design, in which the independent variables coir fiber and compatibilizer content were varied. The compatibilizer used was maleic anhydride grafted polypropylene (PP-g-MA). Compatibilizer free composites were also prepared. Composites were prepared in a corotating twin-screw extruder and the mechanical behavior of polypropylene/coir fiber composites were assessed through monotonic (tensile) and cyclic (fatigue) tests. Fatigue load controlled tests were conducted under tension-tension loads at a frequency of 6 Hz. The fracture mechanism was accompanied by surface fracture analyses using scanning electron microscopy (SEM). The results indicated the need for using compatibilizer in the composites; however, increase in compatibilizer content did not affect composite fatigue lifetime. Coir content was the variable with the strongest effect on composite properties; increasing this variable caused significant increase in fatigue life.
机译：研究了聚丙烯/椰壳纤维复合材料的疲劳行为。根据实验统计设计制备复合材料，其中独立变量椰壳纤维和增容剂含量是变化的。所用的相容剂是马来酸酐接枝的聚丙烯（PP-g-MA）。还制备了不含增容剂的复合材料。在同向双螺杆挤出机中制备复合材料，并通过单调（拉伸）和循环（疲劳）测试评估聚丙烯/椰壳纤维复合材料的机械性能。疲劳载荷控制试验是在6 Hz的拉伸-拉伸载荷下进行的。断裂机理伴随着使用扫描电子显微镜（SEM）的表面断裂分析。结果表明需要在复合材料中使用增容剂。但是，增容剂含量的增加不会影响复合材料的疲劳寿命。椰壳含量是对复合材料性能影响最大的变量。增加此变量会导致疲劳寿命显着增加。

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