Abstract: Differential scanning calorimetry (DSC) was used to evaluate the antioxidation performances of sulfur- and phosphorus-free organic molybdenum (MoSB) and dibutyldithiocarbamate antioxidant (V 7723) in polyalphaolefin synthetic lubricant (PAO). The static and dynamic DSC oxidative results indicated that the combination of MoSB with V 7723 could improve oxidation induction time（OIT）and incipient oxidation temperature (IOT)，exhibiting good synergistic antioxidation properties in PAO.

摘要： 采用差示扫描量热法（DSC）评价了非硫磷有机钼酸酯和亚甲基双二丁基二硫代氨基甲酸酯在聚-α-烯烃合成润滑油中的抗氧化安定性。静态和动态DSC氧化试验结果表明，非硫磷有机钼酸酯与亚甲基双二丁基二硫代氨基甲酸酯复合后，均可有效提高油品的氧化诱导时间和起始氧化温度，表现出了良好的高温抗氧协同作用。