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ABSTRACT
The main objective of this research is to investigate the effect of compression cycles and hybridization on mechanical and physical properties of kenaf fiber reinforced POM composite. In this study, kenaf, and polyethylene terephthalate (PET) fiber were used as reinforcements due to their excellent mechanical properties and resistance to thermal degradation during recycling process. The matrix used was polyoxymethylene (POM) copolymer due to its hydrophobic characteristics and good mechanical properties. In this investigation, two formulations namely POM/kenaf, and POM/kenaf/PET hybrid composite were carefully studied. The results of the investigation revealed that the tensile strength of both POM/kenaf, and POM/kenaf/PET after first recycling process dropped by approximately 83% and 67%, respectively. The tensile strength remained consistent after second and third compression cycle. The flexural strength of both composites also dropped by nearly 50% and 53%, but remained consistent after second and third compression cycle. However, the composite resistance to water absorption significantly increased due to less voids and micro-cracks observed after recycling process. The results obtained have shown that the recycled composites retained their mechanical properties after the last two compression cycles.
摘要
本文主要研究压缩循环和杂交对采用 POM 复合物增强的洋麻纤维的机械和物理性能的影响。在这项研究中，洋麻和聚对苯二甲酸乙酯（PET）纤维用作增强措施，因为在回收处理过程中它们具有优良的机械性能和耐热降解性。所使用的基质是聚甲醛（POM）共聚物，因为它具有疏水特性和良好的机械性能。本文对两种复合材料（即 POM/洋麻和 POM/洋麻/PET 混杂复合材料）进行了认真研究。研究结果表明，这两种制剂的抗拉强度在第一个回收处理之后分别下降了约 83％和 67％，而在经过第二个和第三个压缩周期后保持一致。这两种复合材料的抗弯强度也下降了近 50％和 53％，但在第二个和第三个压缩周期后仍维持不变。然而，由于回收处理后观察到空隙和微裂纹减少，复合材料的抗吸水性显著增加。研究结果表明，经过回收的复合材料在后两个压缩循环后保持了其机械性能。