1,3,4-噻二唑衍生物的合成及其抗腐减摩性能

以2-巯基-5-甲基-1,3,4-噻二唑为原料,经分子设计合成了一种新型噻二唑衍生物2-苄基巯基-5-甲基-1,3,4-噻二唑(简称TM),利用FTIR、元素分析、液相色谱和质谱等手段对产物的结构进行了表征,确定了合成产物为目标产物TM,且纯度大于90.0%。采用热重分析测试了TM的热稳定性,TM热分解温度为232℃,具有较好的热稳定性;腐蚀性实验结果表明,TM具有较好的抗腐蚀性。将TM作为多功能润滑油添加剂添加到基础油中,利用四球摩擦磨损试验机考察了TM的摩擦学性能。实验结果表明,TM具有良好的抗磨减摩性能,当添加量为0.6%(w)时,抗磨减摩效果最佳;在较宽载荷范围(100～500 N)内,添加0.6%(w)TM的加剂油的摩擦系数和钢球的磨斑直径较基础油均有较好的改善。

Synthesis of 1,3,4-Thiadiazole Derivative and Its Anti-Corrosion and Friction-Reducing Performance

A thiadiazole derivative named 2-benzylmercapto-5-methyl-1,3,4-thiadiazole(TM),a novel additive for conventional lubricating oil,was synthesized from 2-mercapto-5-methyl-1,3,4-thiadiazole,and characterized by means of FTIR,elemental analysis,liquid chromatography and mass spectrometry.Thermal gravimetric analysis was carried out to evaluate its thermostability and the results showed that the thermal decomposition temperature of TM was at 232 ℃.Anti-corrosion and friction-reducing performances of TM in based stock were investigated by means of copper strip corrosion and four ball tester test.The results indicated that the wear diameter and frictional coefficients of the system could be lessened obviously with the addition of TM.In the range of load 100-500 N,the appropriate dosage of TM was 0.6%.