A study of degradation of cellulosic insulation materials in a power transformer, part 1. Molecular weight study of cellulose insulation paper

Hill, D. J. T., Le, T. T., Darveniza, M. and Saha, T. (1995) A study of degradation of cellulosic insulation materials in a power transformer, part 1. Molecular weight study of cellulose insulation paper. Polymer Degradation and Stability, 48 1: 79-87. doi:10.1016/0141-3910(95)00023-F


Author Hill, D. J. T.
Le, T. T.
Darveniza, M.
Saha, T.
Title A study of degradation of cellulosic insulation materials in a power transformer, part 1. Molecular weight study of cellulose insulation paper
Journal name Polymer Degradation and Stability   Check publisher's open access policy
ISSN 0141-3910
1873-2321
Publication date 1995-01-01
Year available 1995
Sub-type Article (original research)
DOI 10.1016/0141-3910(95)00023-F
Open Access Status Not yet assessed
Volume 48
Issue 1
Start page 79
End page 87
Total pages 9
Place of publication OXFORD
Publisher ELSEVIER SCI LTD
Language eng
Subject 3104 Condensed Matter Physics
2211 Mechanics of Materials
2507 Polymers and Plastics
2505 Materials Chemistry
Abstract As a transformer ages, the chemical and physical properties of the cellulose insulation paper will change. For example, the average molecular weight of the cellulose chains decreases with age, as does the strength of the insulation paper. The molecular weight changes can be studied by several methods. However, the GPC method reported in this paper has an advantage over the other methods because it yields the total molecular weight distribution. In order to understand the mechanism of the degradation of the cellulosic insulation materials in a power transformer, a study of the accelerated ageing of cellulosic insulation paper in insulation oil has been performed in the temperature range 129–166 °C, under vacuum. The molecular weight and molecular weight distribution of the cellulose chains present in the insulation paper were measured by GPC techniques. The results provide information on the kinetics of degradation of the insulation paper. The results of the molecular weight study in the accelerated ageing experiments were found to be most useful for monitoring the condition of the insulation paper in an operational transformer.
Keyword THERMAL-DEGRADATION
TRICARBANILATE
CHROMATOGRAPHY
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Information Technology and Electrical Engineering Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 49 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 66 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Fri, 11 Mar 2011, 00:30:24 EST