How to significantly improve the mechanical and tribological properties of polyamide 46/polyphenylene oxide (PA46/PPO) alloy is an urgent but challenging issue. The PA46/PPO alloy reinforced with polyurethane-coated carbon fiber (PCF) was prepared and characterized. It was found that the mechanical properties, heat resistance, and tribological properties of PA46/PPO were greatly enhanced by incorporating PCF. When the composite containing 40 wt% of PCF, the tensile strength of the composite increased from 82 MPa to 282 MPa; meanwhile, volumetric wear was 0.56 mm3, which decreased by 95% in comparison with PA46/PPO. Scanning electron microscopy results showed that PCF had a good compatibility with the polymer matrix, due to good interfacial interaction between the PCF and the PA46/PPO. X-Ray photoelectron spectroscopy and laser Raman spectroscopy results further revealed that more graphitic carbon was microcracked to form a lubricating layer during friction process, thus remarkably improving the wear resistance of PA46/PPO.

中文翻译：

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聚氨酯涂层碳纤维显着提高聚酰胺 46/聚苯醚合金的机械和摩擦学性能

如何显着提高聚酰胺46/聚苯醚（PA46/PPO）合金的机械和摩擦学性能是一个紧迫但具有挑战性的问题。制备并表征了聚氨酯涂层碳纤维 (PCF) 增强的 PA46/PPO 合金。研究发现，加入 PCF 后 PA46/PPO 的机械性能、耐热性和摩擦学性能大大提高。当复合材料含有40 wt%的PCF时，复合材料的拉伸强度从82 MPa提高到282 MPa；同时，体积磨损为 0.56 mm3，与 PA46/PPO 相比减少了 95%。扫描电子显微镜结果表明，由于 PCF 和 PA46/PPO 之间良好的界面相互作用，PCF 与聚合物基体具有良好的相容性。