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首页> 外文期刊>Journal of Applied Polymer Science >Effects of modified poly(tetrafluoroethylene) on the physico-mechanical and tribological properties of carbon-black filled nitrile-butadiene rubber
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Effects of modified poly(tetrafluoroethylene) on the physico-mechanical and tribological properties of carbon-black filled nitrile-butadiene rubber

机译：改性聚（四氟乙烯）对炭黑填充丁腈橡胶物理 - 机械和摩擦学性质的影响

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摘要

In this study the effects of electron beam irradiated poly (tetrafluoroethylene) (IR-PTFE) on the mechanical and tribological properties as well as thermal and solvent aging behavior of carbon black filled nitrile-butadiene rubber vulcanizates were studied. Based on the obtained results, addition of 30phr IR-PTFE reduced mechanical strength about 10%, whereas coefficient of friction desirably reduced up to 60%. It was shown that IR-PTFE significantly improved tribological properties by affecting the adhesion contribution of the friction mechanism. Moreover, formation of IR-PTFE transfer films also contributed to the reduction of coefficient of friction in the long term tests. In addition, it was explained that IR-PTFE enhances the sulfur cross-linking reaction in the vulcanizates by reducing the intensity of carbon black network. Therefore, augmented chemical cross-links compensates the loss of physical cross-links in the carbon black network and keeps the solvent swelling resistance unchanged. Also, IR-PTFE showed positive effects on the solvent aging of the vulcanizates, whereas the thermal aging of vulcanizates was unaffected.
机译：研究了电子束辐照聚四氟乙烯（IR-PTFE）对炭黑填充丁腈橡胶硫化胶的力学性能、摩擦学性能以及热老化和溶剂老化性能的影响。根据所得结果，添加30份IR-PTFE可使机械强度降低约10%，而摩擦系数有望降低至60%。结果表明，IR-PTFE通过影响摩擦机制的附着力，显著改善了摩擦学性能。此外，在长期试验中，IR-PTFE转移膜的形成也有助于降低摩擦系数。此外，还解释了IR-PTFE通过降低炭黑网络强度来增强硫化胶中的硫交联反应。因此，增强的化学交联补偿了炭黑网络中物理交联的损失，并保持溶剂溶胀阻力不变。此外，IR-PTFE对硫化胶的溶剂老化有积极影响，而硫化胶的热老化不受影响。

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