A novel thiadiazole derivative(TM) was synthesized using 5-methyl-2-mecapto-l,3,4-thiadiazole and salicylic acid as main raw materials,and it was characterized by FT-IR.elementary analysis, LC and MS. The thermal stability of TM was evaluated by TGA.and its wear and friction behavior was investigated by a four-ball testing machine using rapeseed oil as base oil. Results show that the synthesized TM possesses good thermal stability with a thermal decomposition temperature of 225. 6℃. Due to its good anti-wear and friction reducing properties, the obtained TM could be used as lube additive, it exhibits an optimum anti-wear and friction reducing performance at an amount of 0. 6%.%以5-甲基-2-巯基-1,3,4-噻二唑(MMTD)和水杨酸为主要原料,合成一种新的噻二唑衍生物——水杨酸硫代-(5-甲基-1,3,4-噻二唑)酯(TM).利用红外光谱、元素分析、液相色谱、质谱等分析手段对产物进行结构表征,采用热重分析评价产物的热稳定性,利用四球摩擦磨损试验机考察TM在菜籽油中的抗磨减摩性能.结果表明:合成产品TM的热分解温度为225.6℃,具有较好的热稳定性；合成产品TM具有良好的抗磨减摩性能,可作为油品的抗磨减摩添加剂,当添加量(ω)为0.6%时,其抗磨减摩效果最佳.
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