Ultrasonic injection moulding was confirmed as an efficient processing technique for manufacturing ultra-high molecular weight polyethylene (UHMWPE)/graphite composites. Graphite contents of 1 wt%, 5 wt%, and 7 wt% were mechanically pre-mixed with UHMWPE powder, and each mixture was pressed at 135°C. A precise quantity of the pre-composites mixtures cut into irregularly shaped small pieces were subjected to ultrasonic injection moulding to fabricate small tensile specimens. The Taguchi method was applied to achieve the optimal level of ultrasonic moulding parameters and to maximize the tensile strength of the composites; the results showed that mould temperature was the most significant parameter, followed by the graphite content and the plunger profile. The observed improvement in tensile strength in the specimen with 1 wt% graphite was of 8.8% and all composites showed an increase in the tensile modulus. Even though the presence of graphite produced a decrease in the crystallinity of all the samples, their thermal stability was considerably higher than that of pure UHMWPE. X-ray diffraction and scanning electron microscopy confirmed the exfoliation and dispersion of the graphite as a function of the ultrasonic processing. Fourier transform infrared spectra showed that the addition of graphite did not influence the molecular structure of the polymer matrix. Further, the ultrasonic energy led oxidative degradation and chain scission in the polymer.

超声波注射成型被证实是一种用于制造超高分子量聚乙烯（UHMWPE）/石墨复合材料的有效加工技术。将1重量％，5重量％和7重量％的石墨含量与UHMWPE粉末机械地预混合，并且将每种混合物在135℃下压制。将精确量的切成不规则形状的小块的预复合材料混合物进行超声波注入成型，以制造小的拉伸试样。采用Taguchi方法可实现最佳的超声成型参数水平，并最大程度地提高复合材料的拉伸强度。结果表明，模具温度是最重要的参数，其次是石墨含量和柱塞轮廓。用1 wt％的石墨观察到的拉伸强度提高了8。8％，所有复合材料的拉伸模量均增加。尽管石墨的存在降低了所有样品的结晶度，但它们的热稳定性比纯UHMWPE的热稳定性高得多。X射线衍射和扫描电子显微镜证实，石墨的剥落和分散是超声处理的函数。傅立叶变换红外光谱表明，添加石墨不会影响聚合物基体的分子结构。此外，超声能导致聚合物中的氧化降解和断链。X射线衍射和扫描电子显微镜证实，石墨的剥落和分散是超声处理的函数。傅立叶变换红外光谱表明，添加石墨不会影响聚合物基体的分子结构。此外，超声能导致聚合物中的氧化降解和断链。X射线衍射和扫描电子显微镜证实，石墨的剥落和分散是超声处理的函数。傅立叶变换红外光谱表明，添加石墨不会影响聚合物基体的分子结构。此外，超声能导致聚合物中的氧化降解和断链。