Ultra-high molecular weight polyethylene (UHMWPE) is one of important materials utilized against impacting threats. In this work, bulk UHMWPE specimens were fabricated in a compression molding chamber, and molding parameters such as pressure and temperature were varied in the specimen preparation stage to investigate the effect of molding parameters on the impact performance. In addition, silicon carbide fillers were included in the UHMWPE matrix to enhance the anti-impact properties of the specimens. From the results, high molding pressure provides enhanced impact resistance due to improved microstructural consolidation. On the other hand, molding temperature just above the melting point of polymer is much beneficial to the anti-impact behavior of the structures. Carbide fillers lead to an increase in the frictional interaction between the impactor and composites and thereby enhancing the impact resistance of the structures. However, the gain in the protective properties performance is restricted up to a certain amount of carbide loading because at higher filler ratios, the composites change from ductile to brittle characteristics. For this reason, crack growth susceptibility develops in the composites at excessive carbide loadings.

中文翻译：

---

碳化物颗粒固结的UHMWPE复合材料的低速冲击性能

超高分子量聚乙烯（UHMWPE）是用于抵御威胁的重要材料之一。在这项工作中，在压缩成型室中制作了大块的超高分子量聚乙烯样品，并在样品制备阶段改变了成型参数（例如压力和温度），以研究成型参数对冲击性能的影响。此外，UHMWPE基体中还包含碳化硅填料，以增强样品的抗冲击性能。结果表明，由于改善的微结构固结，高成型压力可提供增强的抗冲击性。另一方面，刚好高于聚合物熔点的模塑温度对结构的抗冲击性能非常有利。碳化物填料导致冲击器和复合材料之间的摩擦相互作用增加，从而增强结构的抗冲击性。但是，由于在较高的填充比下，复合材料会从韧性转变为脆性，因此在达到一定数量的碳化物负载时，保护性能的提高受到限制。因此，在过多的碳化物载荷下，复合材料中会产生裂纹扩展敏感性。