Material morphology and energy barriers to electrical ageing

Author

Cooper, E.S. ; Fothergill, J.C. ; Dissado, L.A. ; Hampton, R.N.

Author_Institution

Dept. of Eng., Leicester Univ., UK

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

260

Lastpage

263

Abstract

A distribution of the parameters representing activation energy of the ageing process within the Dissado-Montanari-Mazzanti (DMM) lifetime model has been shown to model experimental lifetime distributions of PET films well. The results imply small differences in the local environments of the moieties involved in the ageing process. Very small changes in the minimum activation energy values have a pronounced effect on the resultant lifetimes of polymer specimens. Changes in the distributions of activation energies with field and temperature can be explained by assuming the ageing process to be one whereby polymer segments on lamella surfaces crystallise to create free volume within the polymer

Keywords

Weibull distribution; ageing; polyethylene insulation; polymer films; DMM lifetime mode; PET films; activation energy; electrical ageing; energy barriers; lamella surfaces; material morphology; polymer specimens; Aging; Dielectrics and electrical insulation; Entropy; Equations; Morphology; Plastic insulation; Polymers; Predictive models; Stress; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid Dielectrics, 2001. ICSD '01. Proceedings of the 2001 IEEE 7th International Conference on

Conference_Location

Eindhoven

Print_ISBN

0-7803-6352-3

Type

conf

DOI

10.1109/ICSD.2001.955615

Filename

955615