Abstract

Four hindered phenolic esters were prepared by esterification between 3-(3,5-Di-tert-butyl-hydroxyphenyl)propionic acid and fatty alcohols. The synthesized esters were characterised by NMR, IR and ESI-MS and analysed for their antioxidant properties and thermal stability. Differential scanning calorimetry (DSC) and Rancimat studies were conducted to explore the effect of synthesized compounds on oxidation stability of base oil. The results from both the studies were correlated well. Thermogravimetric analysis indicates that all the esters have significantly high thermal stability. Among all the prepared compounds myristyl alcohol ester showed better antioxidant properties whereas, stearyl alcohol ester exhibited higher thermal stability. The synthesized antioxidants can be potential bio additives for lubricant formulations.

中文翻译：

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脂肪醇基立体受阻酯的合成作为潜在的生物添加剂抗氧化剂

摘要

通过3-（3,5-二叔丁基-羟基苯基）丙酸与脂肪醇之间的酯化反应制备了四种受阻酚酯。通过NMR，IR和ESI-MS对合成的酯进行表征，并分析其抗氧化性能和热稳定性。进行差示扫描量热法（DSC）和Rancimat研究，以探索合成化合物对基础油氧化稳定性的影响。两项研究的结果相关性很好。热重分析表明，所有的酯都具有很高的热稳定性。在所有制备的化合物中，肉豆蔻醇酯显示出更好的抗氧化性能，而硬脂醇酯显示出更高的热稳定性。合成的抗氧化剂可以是润滑剂配方的潜在生物添加剂。