The University of Southampton
University of Southampton Institutional Repository

Chemical, physical and electrical properties of aged dodecylbenzene 3: thermal ageing of mixed isomers in nitrogen and sealed conditions

Hosier, Ian L., Vaughan, Alun S., Sutton, Simon J., Cooper, Jenny and Davis, Fred J. (2008) Chemical, physical and electrical properties of aged dodecylbenzene 3: thermal ageing of mixed isomers in nitrogen and sealed conditions IEEE Transactions on Dielectrics and Electrical Insulation, 15, (4), pp. 1056-1064. (doi:10.1109/TDEI.2008.4591228).

Record type: Article


Commercial dodecylbenzene cable fluid was aged at temperatures of 105 and 135 oC in dry oxygen-free nitrogen. In addition, selected samples were aged at 135 oC under sealed conditions where air was excluded from the headspace above the oil. A variety of analytical techniques, such as ultra-violet visible and infra-red spectroscopy, acid number and water content measurements, were then used to characterize the aged oils. In addition, their electrical properties were assessed by dielectric spectroscopy. Compared with ageing in air, the ageing rate was reduced significantly and, as expected, no major oxidation peaks were detected in the infrared spectrometer. Significantly, very little absorbance at 680 nm (“red absorbers”) was detected in samples aged with copper and, consequentially, no large increases in dielectric loss were recorded within the ageing times considered here. This study compliments previous investigations on cable fluid and 1-phenyldodecane aged in air and show that the same ageing indicators are valid in oils aged under conditions which more closely resemble those found in high voltage plant.

PDF 04591228.pdf - Author's Original
Restricted to Registered users only
Download (632kB)

More information

Published date: August 2008
Organisations: EEE


Local EPrints ID: 266553
PURE UUID: 98721fa9-11a2-478c-b6b9-649f450e0568
ORCID for Ian L. Hosier: ORCID iD

Catalogue record

Date deposited: 11 Aug 2008 11:00
Last modified: 18 Jul 2017 07:15

Export record



Author: Ian L. Hosier ORCID iD
Author: Alun S. Vaughan
Author: Simon J. Sutton
Author: Jenny Cooper
Author: Fred J. Davis

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.