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高聚物的摩擦数据变化甚大,作者认为其主要原因是高聚物的粘弹性。利用弹簧-粘盘的力学模型描述了高聚物的粘弹性,根据高聚物的动态力学性能论述了高聚物摩擦性能与粘弹性的关系。并指出,当材料的摩擦系数随滑动速度的提高而下降时,摩擦体系将会发生振动、噪音和粘-滑现象。 在材料手册中至今尚无高聚物的磨损数据。目前设计者对PV值较感兴趣,作者认为手册中的PV值不能真实地表示材料的性能,只有在确定温度条件下的PV值才有意义。同时介绍了摩擦表面上温度升高值的经验公式和几种测量摩擦温度的方法,并对高聚物的磨损特性作了论述。
Friction data of polymers vary greatly, the author believes that the main reason is the viscoelasticity of polymers. The viscoelasticity of the polymer was described by the mechanical model of the spring-viscous disk. The relationship between the tribological properties of the polymer and the viscoelasticity was discussed based on the dynamic mechanical properties of the polymer. It is pointed out that when the friction coefficient of material decreases with the increase of sliding velocity, the friction system will vibrate, noise and stick-slip phenomenon. To date, there is no data on the wear of polymers in the material manuals. At present, designers are more interested in the PV value. The author believes that the PV value in the manual can not truly represent the performance of the material. Only the PV value under certain temperature conditions makes sense. At the same time, the empirical formula of the temperature increase on the friction surface and several methods of measuring the friction temperature are introduced. The wear characteristics of the polymer are also discussed.