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Polymer-polymer friction as a function of test speed

机译:聚合物-聚合物摩擦与测试速度的关系

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Tests of sliding friction between identical polymer films have been carried out at sliding speeds of 0.0001 to over 10 m/s. In order to make measurements over such a wide range of speeds, three devices are employed. In each apparatus, a moving member with two identical polymer surfaces slides between two stationary blocks covered with the same polymer. The slow-moving crossarm of a standard Instron tester provides speeds of 0.0085 to 0.21 cm/s. A horizontal sled apparatus provides speeds of 1 to 10 cm/s. Finally, a modified impact test machine uses a pendulum that moves at about 3 m/s. Results with four polymer films illustrate a variety of behavior. The coefficient of friction, mu, for cellulose acetate decreases with increasing speed. Films of low-density polyethylene and polytetrafluoroethylene show increases in mu with speed. A film of ultrahigh molecular weight polyethylene shows only a slight decrease in mu with speed. (C) 1998 John Wiley & Sons, Inc. [References: 6]
机译:已经在0.0001至超过10 m / s的滑动速度下进行了相同聚合物薄膜之间的滑动摩擦测试。为了在如此宽的速度范围内进行测量,采用了三个设备。在每种设备中,具有两个相同聚合物表面的移动构件在两个覆盖有相同聚合物的固定块之间滑动。标准Instron测试仪的缓慢移动的横臂可提供0.0085至0.21 cm / s的速度。水平滑车设备的速度为1至10 cm / s。最后,一种改进的冲击试验机使用的摆锤的运动速度约为3 m / s。四个聚合物薄膜的结果说明了多种行为。醋酸纤维素的摩擦系数μ随速度增加而减小。低密度聚乙烯和聚四氟乙烯薄膜的亩数随速度增加。超高分子量聚乙烯薄膜的亩数仅随速度而略有下降。 (C)1998 John Wiley&Sons,Inc. [参考:6]

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