ABSTRACT In this study, composite materials from agricultural biomass and polypropylene (PP) thermoplastic were produced by melt compounding using a melt mixer. The chemical interaction of sugarcane bagasse (SCB)-PP and soft wood (SW)-PP composites and corresponding cellulose were verified by Fourier-transform infrared spectroscopy (FTIR) analysis, X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The cellulose composites were more crystalline than PP, trailed by PP/SCB and PP/SW composites. It was found that among composite materials, PP/SCB were least thermally stable compared to PP/SW. The addition of extracted cellulose decreased the thermal stability of PP/SCB composites at higher filler content due to poor interfacial bonding as compared to PP/SW composites. SEM results confirmed a rough morphology and the presence of many voids resulting from fibre pull-out in composites, especially for the ones with higher fibre content. Dynamic mechanical analysis (DMA) of both PP/SCB and PP/SW composites indicated improvement in the storage modulus compared with neat PP.

中文翻译：

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碱处理甘蔗渣与针叶木纤维素/聚丙烯复合材料的比较

摘要在这项研究中，农业生物质和聚丙烯 (PP) 热塑性塑料的复合材料是通过使用熔体混合器进行熔体复合生产的。通过傅里叶变换红外光谱 (FTIR) 分析、X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 验证了甘蔗渣 (SCB)-PP 和软木 (SW)-PP 复合材料和相应纤维素的化学相互作用. 纤维素复合材料比 PP 结晶度更高，其次是 PP/SCB 和 PP/SW 复合材料。结果发现，在复合材料中，与 PP/SW 相比，PP/SCB 的热稳定性最差。与 PP/SW 复合材料相比，由于界面结合较差，添加提取纤维素会降低填料含量较高的 PP/SCB 复合材料的热稳定性。SEM 结果证实了复合材料中由于纤维拉出而导致的粗糙形态和许多空隙的存在，特别是对于纤维含量较高的那些。PP/SCB 和 PP/SW 复合材料的动态力学分析 (DMA) 表明，与纯 PP 相比，储能模量有所提高。