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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >Study on Performance of 2,5-dimercapto-1,3,4-thiadiazole (DMTD) Derivative as a Multifunctional Lubricant Additive
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Study on Performance of 2,5-dimercapto-1,3,4-thiadiazole (DMTD) Derivative as a Multifunctional Lubricant Additive

机译：2,5-二巯基-1,3,4-噻二唑（DMTD）衍生物作为多功能润滑油添加剂的性能研究

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摘要

In general, the most important function of lubricants is to reduce wear, friction in moving machinery, and protect metal surfaces against oxidation. Due to stricter environmental control, it is required lubricant formulation with significantly lower or zero phosphorus content. For economical reasons, it is also preferred that the additive possesses other functional properties for improving the lubricating properties of the oil. In our study, a oil-soluble multifunctional ashless additive derivative of 2,5-dimercapto-1,3,4-thiadiazole(DMTD) was synthesized in high yields. The antiwear and extreme pressure properties of the additiver in mineral base oil were evaluated by four ball tester, the antioxidation properties in ester lubricant were evaluated by differential scanning calorimetry (DSC), thin film oxygen uptake test(TFOUT) and oxidation-corrosion tests. In the four ball test, the additive can obviously improve the load carrying and antiwear abilities of the base oil under certain conditions ,and better than zinc dialkyldithiophosphates (ZDDP), in the isothermal and temperature programmed DSC oxidation test and thin film oxygen uptake test, it can improve resistance of oil towards oxidation, and exhibits better antioxidation properties than commercial dithiocarbamate derivative or ZDDP antioxidants , in the oxidation-corrosion test, it can not only effectively reduce the increases in viscosity and acid number of ester base oil at elevated temperature, but also superiors to commercial arylamine and phenolic antioxidants in oxidation stabilities. Therefore, the novel compound is an effectively multifunctional lubricant additive.
机译：通常，润滑剂最重要的功能是减少运动机械中的磨损，摩擦并保护金属表面免受氧化。由于严格的环境控制，要求润滑剂配方的磷含量明显降低或为零。出于经济原因，还优选添加剂具有其他功能性质以改善油的润滑性质。在我们的研究中，以高收率合成了油溶性的2,5-二巯基-1,3,4-噻二唑（DMTD）的多功能无灰添加剂衍生物。用四球测试仪评估了矿物基础油中添加剂的抗磨性和极压性能，通过差示扫描量热法（DSC），薄膜氧吸收测试（TFOUT）和氧化腐蚀测试评估了酯润滑剂的抗氧化性能。在四球试验中，该添加剂在一定条件下可显着改善基础油的负载和抗磨性能，并且在等温和程序升温DSC氧化试验和薄膜吸氧试验中，其性能优于二烷基二硫代磷酸锌（ZDDP）。与市售的二硫代氨基甲酸酯衍生物或ZDDP抗氧化剂相比，它可以提高油的抗氧化性，并具有更好的抗氧化性能，在氧化腐蚀试验中，它不仅可以有效地降低高温下酯基油的粘度和酸值的增加，而且在氧化稳定性方面也优于市售的芳胺和酚类抗氧化剂。因此，该新型化合物是有效的多功能润滑剂添加剂。

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