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以油酸和钛酸四异丙基酯为原料,合成了3种非硫磷有机钛酸酯(TAE),用红外光谱对其结构进行了表征,分别采用差示扫描量热法和旋转氧弹实验考察了TAE在聚-α-烯烃(PAO)基础油中的热氧化安定性,并考察了其与4,4’-二异辛基二苯胺(DODPA)的抗氧协同性能。结果表明,TAE自身不具有抗氧性能,当添加0.75%DODPA与0.25%TAE(均为质量分数,以PAO基础油的质量计)复配时,产生良好的抗氧协同效果,与单独添加1%DODPA的PAO相比,起始氧化温度提高了18.6℃,氧化诱导时间延长了69.4 min,表现出了良好的抗氧协同性能。最后,通过红外光谱分析了油样在不同氧化时间下的羰基峰面积,并对TAE与DODPA的抗氧协同机理进行了探讨。
Three kinds of non-thiophosphorous organic titanates (TAE) were synthesized from oleic acid and tetraisopropyl titanate. Their structures were characterized by IR. Differential scanning calorimetry (DSC) and cyclic oxygenation The thermal oxidation stability of TAE in poly-α-olefin (PAO) base oil was investigated by bomb experiments, and the synergistic performance of TAE with 4,4’-diisooctyl diphenylamine (DODPA) was investigated. The results showed that TAE itself did not have antioxidant properties, when adding 0.75% DODPA and 0.25% TAE (both mass fraction, based on the mass of PAO base oil) compound, have a good synergistic effect of anti-oxidation, % DODPA PAO, the initial oxidation temperature increased by 18.6 ℃, the oxidation induction time extended by 69.4 min, showed good synergistic anti-oxidation performance. Finally, the carbonyl peak area of the oil sample at different oxidation times was analyzed by infrared spectroscopy, and the synergistic anti-oxidation mechanism of TAE and DODPA was also discussed.