Effect of crosslink on tribological performance of polyurethane bearing material
Effect of crosslink on tribological performance of polyurethane bearing material
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交联对聚氨酯轴承材料摩擦学性能的影响
DOI：
10.1016/j.triboint.2019.03.064
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发表时间：
2019-08-01
影响因子：
6.2
通讯作者：
Bai, Xiuqin
中科院分区：
文献类型：
--
作者：
Jiang, Shaoli;Yuan, Chengqing;Bai, Xiuqin
聚氨酯作为一种用途广泛的材料，作为水润滑轴承材料得到了广泛的研究。然而，摩擦学性能与其内部材料结构之间的联系，特别是交联，仍然难以捉摸。本文研究了交联对热塑性聚氨酯（TPU）摩擦学性能的影响。通过伽马射线增强氢键效应，得到了不同交联度的tpu。结果表明，摩擦系数总体上随交联度的增加而增大。这是因为增强的交联意味着更多的分子链通过氢键交联在一起，导致摩擦过程中消耗更多的能量。此外，摩擦过程中产生的颗粒越来越大，导致第三体机制，影响TPU的磨损行为。
Polyurethane, as one versatile family of material, has been studied widely for water-lubricated bearings material. However, the connection between tribological performance and their internal material structure, in particular, crosslinks, remains elusive. Here, the effect of crosslink on the tribological performance of thermoplastic polyurethane (TPU) has been elucidated. TPUs with different crosslink degree were obtained by strengthening hydrogen bonded effect via Gamma-ray. The result shows that the friction coefficient increases with the increase of crosslink degree overall. It is because that enhanced crosslink means more molecular chains crosslink together by hydrogen bonds, resulting in more energy consumption during the friction process. In addition, incremental and larger particles produced during friction leads to third-body mechanism, acting on wear behavior of TPU.