City Research Online

Effect of side chains on the dielectric properties of alkyl esters derived from palm kernel oil

Abdelmalik, A. A., Fothergill, J., Dodd, S. J. , Abbott, A. P. & Harris, R. C. (2011). Effect of side chains on the dielectric properties of alkyl esters derived from palm kernel oil. Proceedings - IEEE International Conference on Dielectric Liquids, ISSN 2153-3725


Alkyl ester derivatives were synthesized from laboratory purified palm kernel oil. The steps in the synthesis involved transesterification of palm kernel oil to produce a methyl ester, followed by epoxidation and then the grafting of side chains by esterification with propionic and butyric anhydride. The dielectric and thermal properties of the ester derivatives were analyzed and compared with the methyl ester. The melting point of the ester derivatives were found to reduce with side chain attachment and antioxidant improved its thermal stability. The dielectric loss was dominated by mobile charged particles and the chemical modification appeared to increase the rate at which electric double layer was formed at the electrode-liquid interface. The esters possessed excellent breakdown strengths suggesting that the processing to optimize their physical properties did not have a negative influence on their electrical breakdown strength. This product may prove useful as an insulation fluid in Electrical Power Transformers.

Publication Type: Conference or Workshop Item (Paper)
Additional Information: © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Presidents's Portfolio
School of Science & Technology > Engineering
Download (314kB) | Preview



Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login