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Material morphology and energy barriers to electrical ageing.

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conference contribution
posted on 2008-10-14, 14:49 authored by Elizabeth S. Cooper, John C. Fothergill, Len A. Dissado, R.N. Hampton
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.

History

Citation

Proceedings of the 20001 IEEE 7th International Conference on Solid Dielectrics, pp. 260-263

Published in

Proceedings of the 20001 IEEE 7th International Conference on Solid Dielectrics

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

issn

0780363523

Copyright date

2000

Available date

2008-10-14

Publisher version

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=955615

Language

en

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