Gel permeation chromatography of the thermal degradation of cellulose insulation paper in an aged power transformer

Hill D.J.T., Le T.T., Darveniza M., Saha T.K. and Williams B. (1992) Gel permeation chromatography of the thermal degradation of cellulose insulation paper in an aged power transformer. Metals forum, 16 2: 141-146.

Author Hill D.J.T.
Le T.T.
Darveniza M.
Saha T.K.
Williams B.
Title Gel permeation chromatography of the thermal degradation of cellulose insulation paper in an aged power transformer
Journal name Metals forum   Check publisher's open access policy
ISSN 0160-7952
Publication date 1992-12-02
Sub-type Article (original research)
Open Access Status Not yet assessed
Volume 16
Issue 2
Start page 141
End page 146
Total pages 6
Language eng
Subject 2200 Engineering
1501 Accounting, Auditing and Accountability
2215 Building and Construction
2507 Polymers and Plastics
Abstract The lifetime of a power transformer and its capacity to be refurbished is often determined by the condition of the cellulose insulation materials used to wrap the copper windings. As a transformer ages the molecular weight of the cellulose in the insulation paper decreases. Here we describe a study of the accelerated ageing of cellulose insulation paper and cotton linter under vacuum at 166°C. The study indicates that the degradation results in a bimodal distribution in molecular weight of the cellulose, which indicates that the scission of bonds in the cellulose chains is non-random, and bonds near the middle of the chains have a higher probability of bond scission than those near the ends. This has been associated with the rod-like structure of the cellulose molecules.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 13 Sep 2016, 15:02:12 EST by System User