The purpose of this study is to explore the performance indexes,structural changes and oxidation process changes of lubricating oil base oils from different sources in thermal and oxygen environments.The oxidation behavior of lubricating oil base oil was systematically characterized and analyzed by using Saybolt color analyzer,Fourier transform infrared spectrometer,gas chromatography-mass spectrometry and thermogravimetric analyzer.The results show that the properties of petroleum-based base oils are more susceptible to oxidation due to the high content of naphthenes in the thermal and oxygen environments.The properties of synthetic base stocks also change,but to a lesser extent.As a result,synthetic base oils can keep lubricant performance relatively stable,but the differences between them and petroleum-based base stocks are not significant.
lubricating oilspetroleum-based base oilssynthetic base oilsoxidationcolorhydrocarbon compositioncarbonyl compounds
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