A novel oil-soluble arylamine antioxidant N¹,N²-diphenylethane-1,2-diamine (ND) was successfully synthesized, and the potential antioxidant behavior of which had never been reported before. The structure of ND was characterized via nuclear magnetic resonance (¹H NMR, ¹³C NMR) and electron ionization mass spectrometry. The antioxidant performance of ND and its synergistic effect with 2,6-di-tert-butyl-4-methylphenol (BHT) in di-2-ethylhexyl sebacate were evaluated by pressurized differential scanning calorimetry, thermogravimetry analysis, and hot oil oxidation test. All the results indicated that the synthesized antioxidant ND exhibited outstanding antioxidant performance and showed prominent synergistic effect with BHT in ester base oil. Furthermore, the probable synergistic anti-oxidative effect between ND and BHT was discussed, which was mainly induced by the formation of a fresh BHT radical and the regeneration of ND antioxidant.

中文翻译：

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一种新型芳胺抗氧化剂的合成及抗氧化性能

成功合成了一种新型的油溶性芳胺抗氧化剂N ¹ , N ² -二苯基乙烷-1,2-二胺(ND)，其潜在的抗氧化行为以前从未报道过。ND的结构通过核磁共振( ¹ H NMR, ¹³C NMR）和电子电离质谱。通过加压差示扫描量热法、热重分析和热油氧化试验评价ND的抗氧化性能及其与2,6-二叔丁基-4-甲基苯酚(BHT)在癸二酸二-2-乙基己酯中的协同作用。所有结果表明合成的抗氧化剂ND表现出优异的抗氧化性能，并与酯基油中的BHT具有显着的协同作用。此外，还讨论了 ND 和 BHT 之间可能的协同抗氧化作用，这主要是由新 BHT 自由基的形成和 ND 抗氧化剂的再生引起的。