Özet:

The purpose of this work is synthesis and characterization of pryridin-yl-borate esters and investigation of tribological performance as additive. The syn-thesis of dialkyl-(2-(pyridin-2-yl) ethyl) borate esters both in the literature and the novel synthesis of dialkyl 2-(methyl (pyridin-2-yl) borate esters and dialkyl 2- (5-ethylpyridin-2-yl) ethyl borate esters were carried out. The boron esters to be obtained were characterized by using IR, 1H NMR,13C NMR spectroscopic methods as well as physical methods such as TAN and corrosion tests. The fric-tion-reducing and anti-wear properties of the synthesized lubricant additives were measured with a four-ball friction and wear tester. As a result of these stud-ies, it has been shown that the friction coefficient is reduced by about 30-40 % compared to the base oil and the wear is also reduced. In the tribological analysis performed using synthesized four molecules within the scope of the study, it was found that resistance to oxidation is increased when the synthesized molecules were added to group I base oil at 0.5 % and 1% w/w concentration. The novel synthesis of dialkyl 2-(methyl (pyridin-2-yl) borate esters and dialkyl 2- (5-ethylpyridin-2-yl) ethyl borate esters were carried out and tribological perfor-mances in base oil were analysed first time.

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