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聚合物薄膜在固-固接触时受到剪切而发生的摩擦与同种聚合物本体试样形变时的断裂行为是密切相关的。对所有本体的力学响应特点和它们对应变速率,温度及压力的敏感性等定性项目进行了观察。然而,考虑到本体样品和薄膜试验之间微小的差异,在定量土有所不同可能是合理的。本报告从高密度聚乙烯取向膜的摩擦方面详细地讨论了这些关系。这些薄膜在温度升高时其摩擦行为有一种独特的转变。起初,摩擦随温度的升高而降低直到达到某一临界温度。在这一临界温度处,摩擦增大然后变得基本上与温度无关了。这一转变温度的位置的重现性和可逆性非常好,而且是接触压力和滑动速度的函数。我们认为,这是一个韧-脆转变点,而且可以从对本体聚合物形变的研究结果来证实这一观点。
The friction generated when the polymer film is sheared during solid-solid contact is closely related to the fracture behavior of the polymer sample when deformed. The mechanistic response characteristics of all ontologies and their qualitative items such as strain rate, temperature and pressure sensitivity were observed. However, taking into account the slight differences between bulk sample and film tests, it may be reasonable to differ in the quantitative soil. This report discusses these relationships in detail from the rubbing of high-density polyethylene oriented films. These films have a unique shift in frictional behavior at elevated temperatures. Initially, the friction decreases with increasing temperature until a certain critical temperature is reached. At this critical temperature, the friction increases and then becomes essentially temperature independent. Reproducibility and reversibility of this transition temperature location are very good and are a function of contact pressure and slip speed. In our opinion, this is a tough-brittle transition point, and this view can be confirmed from the findings of bulk polymer deformation.