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首页> 外文期刊>International Journal of Polymer Science >Understanding the Reinforcing Mechanisms in Kenaf Fiber/PLA and Kenaf Fiber/PP Composites: A Comparative Study
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Understanding the Reinforcing Mechanisms in Kenaf Fiber/PLA and Kenaf Fiber/PP Composites: A Comparative Study

机译：了解Kenaf纤维/ PLA和Kenaf纤维/ PP复合材料的增强机理：对比研究

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This study focused on exploring the feasibility of green composites made from biodegradable and renewable materials as potential alternatives to petroleum polymer composites and understanding the reinforcing mechanisms in composites containing kenaf fibers (KF). KF-reinforced poly(lactide) acid (PLA) composites were made using melt compounding and injection molding, and their properties were compared to that of KF-reinforced polypropylene (PP) composites. The flexural properties and thermomechanical behavior were determined as a function of the fiber content, the crystallization of PLA and PP was studied using X-ray diffraction and differential scanning calorimetry, and the composites’ morphology was investigated using scanning electron microscopy. It was concluded that PLA exhibits higher modulus and Tg compared to those of neat PP. The modulus of the composites at 40 wt% fibers is 6.64 GPa and 2.96 GPa for PLA and PP, respectively. In general, addition of kenaf results in larger property enhancement in PP due to better wetting of the fibers by the low melt viscosity PP and the crystallization behavior of PP that is significantly altered by the fibers. The novelty of this work is that it provides one-to-one comparison of PLA and PP composites, and it explores the feasibility of fabricating green composites with enhanced properties using a simple scalable process.
机译：这项研究的重点是探索由可生物降解和可再生材料制成的绿色复合材料作为石油聚合物复合材料的潜在替代品的可行性，并了解含洋麻纤维（KF）的复合材料的增强机理。使用熔融混炼和注塑成型法制备了KF增强的聚丙交酯酸（PLA）复合材料，并将其性能与KF增强的聚丙烯（PP）复合材料进行了比较。确定弯曲性能和热力学行为与纤维含量的关系，使用X射线衍射和差示扫描量热法研究PLA和PP的结晶，并使用扫描电子显微镜研究复合材料的形态。结论是，与纯PP相比，PLA的模量和Tg更高。在PLA和PP纤维含量为40 wt％时，复合材料的模量分别为6.64 GPa和2.96 GPa。通常，由于低熔体粘度PP更好地润湿了纤维，以及纤维显着改变了PP的结晶行为，因此添加洋麻可以提高PP的性能。这项工作的新颖之处在于它提供了PLA和PP复合材料的一对一比较，并且探索了使用简单的可扩展工艺制造具有增强性能的绿色复合材料的可行性。

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