高岭土填充改性超高分子量聚乙烯的浆体冲蚀磨损特性

Study on the Erosion Wear Characteristics and Mechanisms of UHMWPE/Kaolin Composites

分别采用机械混合和釜内聚合方法在 UHMWPE基体上填充高岭土 ,制得两类 UHMWPE/ Kaolin复合材料 ,考察了两类 UHMWPE/ Kaolin复合材料的浆体冲蚀磨损特性及其与冲击速度和高岭土含量之间的关系 ,通过对磨损表面形貌的观察分析 ,探讨了 UHMWPE/ Kaolin复合材料的磨损机理 .结果表明 ,采用聚合方法制备的含高岭土约6 .6 % (质量分数 ) UHMWPE/ Kaolin复合材料的浆体冲蚀磨损性能优于 UHMWPE。

Two kinds of ultra high molecular weight polyethylene (UHMWPE)/Kaolin composites were prepared by means of melt mixing and polymerization filling, respectively. The erosion wear characteristics of the two kinds of UHMWPE/Kaolin composites and their relationships with the velocity of a sand slurry were investigated on an erosion wear tester. The wear mechanisms of the composites were discussed through examining and analyzing the worn surfaces with a scanning electron microscope. It has been found that the UHMWPE/Kaolin composite of about 6.6% (mass fraction) kaolin prepared by polymerization filling has much better erosion wear properties than UHMWPE and is thus a promising structural material candidate for engineering application.