DOI : https://doi.org/10.18517/ijaseit.4.1.355

Lubricity Characterizations of Sebacic Acid Based Ester

Waled Abdo Ahmed (1), Jumat Salimon (2), Mohd Ambar Yarmo (3)
(1) School of Chemical Science and Food Technology, Faculty of Science and Technology UKM, Bangi 43600- Malaysia
(2) School of Chemical Science and Food Technology, Faculty of Science and Technology UKM, Bangi 43600- Malaysia
(3) School of Chemical Science and Food Technology, Faculty of Science and Technology UKM, Bangi 43600- Malaysia
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How to cite (IJASEIT) :
Abdo Ahmed, Waled, et al. “Lubricity Characterizations of Sebacic Acid Based Ester”. International Journal on Advanced Science, Engineering and Information Technology, vol. 4, no. 1, Feb. 2014, pp. 1-6, doi:10.18517/ijaseit.4.1.355.
Citation Format :
The current study aimed to evaluate the effect of long-chain and branch alcohol on lubricity of sebacic acid based ester. Since currently synthesis of a new lubricant to improve the lubricity properties and quality of lubricant is increasing, in this study, sebacic acid esters were synthesized by the conventional esterification method with some modification using sulfuric acid (SA) as catalyst. Twelve samples of sebacic acid esters with different chemical structures were synthesized including di-2-octyl sebacate, didecyl sebacate, di-2 ethylhexanol sebacate, di-2-ethylbutyl sebacate and dioleyl sebacate. These diesters were tested in terms of their suitability as lubricant. The results showed that the pour point, flash point and oxidation stability were affected by liner and branch of the alcohol used. Di-2-ethylbutyl sebacate (D2EBS) and di-2-ethylhexanol sebacate (D2EHS) showed very low pour point at -44°C and -60°C respectively, while the same carbon number of dihexyl sebacate (DHS) and dioctyl sebacate (DOS) recorded high pour point at 8°C and 15 °C respectively. These differences were due to the presence of the branching. DOS recorded the highest oxidative stability at 290°C. However, there was a slight negative effect of the branching on the flash point.

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