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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical, thermal, and morphological properties of maleic anhydride-g-polypropylene compatibilized and chemically modified banana-fiber-reinforced polypropylene composites
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Mechanical, thermal, and morphological properties of maleic anhydride-g-polypropylene compatibilized and chemically modified banana-fiber-reinforced polypropylene composites

机译：马来酸酐-g-聚丙烯相容的和化学改性的香蕉纤维增强聚丙烯复合材料的机械，热学和形态学性能

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摘要

Composites were prepared with chemically modified banana fibers in polypropylene (PP). The effects of 40-mm fiber loading and resin modification on the physical, mechanical, thermal, and morphological properties of the composites were evaluated with scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Infrared (IR) spectroscopy, and so on. Maleic anhydride grafted polypropylene (MA-g-PP) compatibilizer was used to improve the fiber-matrix adhesion. SEM studies carried out on fractured specimens indicated poor dispersion in the unmodified fiber composites and improved adhesion and uniform dispersion in the treated composites. A fiber loading of 15 vol % in the treated composites was optimum, with maximum mechanical properties and thermal stability evident. The composite with 5% MA-g-PP concentration at a 15% fiber volume showed an 80% increase in impact strength, a 48% increase in flexural strength, a 125% increase in flexural modulus, a 33% increase in tensile strength, and an 82% increase in tensile modulus, whereas the heat deflection temperature increased by 18°C.
机译：用化学改性的香蕉纤维制成聚丙烯（PP）复合材料。通过扫描电子显微镜（SEM），热重分析（TGA），红外（IR）光谱等评估了40毫米纤维负载量和树脂改性对复合材料的物理，机械，热和形态性能的影响。 。马来酸酐接枝聚丙烯（MA-g-PP）增容剂用于改善纤维基质的粘合力。在断裂样品上进行的SEM研究表明，在未改性纤维复合材料中的分散性较差，在处理后的复合材料中的粘合性和分散性均得到改善。在处理后的复合材料中，纤维含量为15％（体积）是最佳的，具有最大的机械性能和热稳定性。在纤维体积为15％的情况下，MA-g-PP浓度为5％的复合材料的冲击强度提高了80％，弯曲强度提高了48％，弯曲模量提高了125％，拉伸强度提高了33％，拉伸模量提高了82％，而热变形温度提高了18°C。

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