聚四氟乙烯/聚苯酯耐磨自润滑保持架材料的研究

摘要

采用聚苯酯填充改性聚四氟乙烯,制备出具有较好耐磨性和自润滑性的保持架复合材料.研究发现聚苯酯添加量为20%时,径向拉伸强度为17.3 MPa,邵氏硬度为64.0,干摩擦系数为0.248 5,耐磨性较纯聚四氟乙烯提高6倍;控制烧结过程降温速率,并在结晶速率最大的温度区保温1 h,径向拉伸强度提高27.2%,耐磨性提高1.7%.%The self - lubricating materials with better wear resistance are prepared by PTFE reinforced with ekonol. The results show that with 20％ wt ekonol, the diametric tensile strength is 17.3 MPa, the Shore hardness 64. 0, the friction coefficient 0.248 5, and the wear resistance increases 6 times compared with pure PTFE. The cooling rate is controlled, soaking 1 hour in the largest crystallization rate temperature zone, the diametric tensile strength and the wear resistance increases 27.2％ and 1.7％ respectively.