【摘要】 节能和环保的发展趋势要求润滑油具有更好的耐高温氧化性能,吩噻嗪衍生物是近年来研究较多的高温抗氧剂.采用4,4′-二(1,1,3,3-四甲基-丁基)-二苯胺和硫反应合成了3,7-二(1,1,3,3-四甲基-丁基)-吩噻嗪.利用HPLC对反应进行了跟踪,并用HPLC-M S、TLC、1H NM R、13C NM R和元素分析对反应的产物和副产物的结构进行了分析确认.用正交试验方法对反应条件进行了优化,优化后目标产物的产率可达91%.产物经应用实验证明,其抗氧性优于4,4′-二(1,1,3,3-四甲基-丁基)-二苯胺.更多还原

【Abstract】 With higher requirements of energy efficiency and emission control,there is a need to improve the anti-oxidation performance of lubricants at high temperature.Phenothiazine derivatives are researched more and more as efficient antioxidants at high temperature in recent years.An antioxidant 3,7-di-（1,1,3,3-tetramethyl-butyl）-phenothiazine was synthesized by reacting 4,4′-di-（1,1,3,3-tetramethyl-butyl）-diphenylamine with sulfur.The reaction was traced by HPLC,and the structure of products and vice-products were analyzed by HPLC-MS,TLC,（）¹H NMR and(（）¹³C NMR).The condition of reaction was optimized by orthogonal test,the yield of the object product was enhanced to 91% through orthogonal test.The performance tests show that 3,7-di-（1,1,3,3-tetramethyl-butyl）-phenothiazine is a better antioxidant than 4,4′-di-（1,1,3,3-tetramethyl-butyl） -diphenylamine.更多还原