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The influence of oxidation on space charge formation in gamma-irradiated low density polyethylene

The influence of oxidation on space charge formation in gamma-irradiated low density polyethylene
The influence of oxidation on space charge formation in gamma-irradiated low density polyethylene
The research presented in this paper investigates the role of oxidation in the formation of space charge in gamma-irradiated low-density polyethylene after being electrically stressed under dc voltage. Polyethylene plaques both with and without antioxidant were irradiated up to 500kGy using a 60Co gamma source and space charge distributions were measured using the piezoelectric induced pressure wave propagation method. It has been found that a large amount of positive charge evolved adjacent to the cathode in the sample without antioxidant and was clearly associated with oxidation of the near surface. The amount of charge formed for a given applied stress, increased with the dose absorbed by the material. On the other hand space charge in a sample containing antioxidant under the same applied electric stress was negligible even in the sample exposed to 500kGy. The Main process to form space charge is via charge injection rather than charge separationin the sample without antioxidant.
Gamma irradiation, charge decay, low-density polyethylene, oxidation, piezoelectric induced pressure propagation method, space charge formation
0969-806X
247-255
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhong, L S
8ad2169d-fe2e-42cd-b3ac-5e5d6b8d765c
Xie, H K
3ee87eb2-e226-4087-bf6d-bdf793de16b4
Banford, H M
276eca8f-5f2b-4095-a0e5-b25681299aaa
Davies, A E
56d95222-b259-494a-92e9-68b090ec0dcd
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhong, L S
8ad2169d-fe2e-42cd-b3ac-5e5d6b8d765c
Xie, H K
3ee87eb2-e226-4087-bf6d-bdf793de16b4
Banford, H M
276eca8f-5f2b-4095-a0e5-b25681299aaa
Davies, A E
56d95222-b259-494a-92e9-68b090ec0dcd

Chen, G, Zhong, L S, Xie, H K, Banford, H M and Davies, A E (2003) The influence of oxidation on space charge formation in gamma-irradiated low density polyethylene. Radiation Physics and Chemistry, Vol. 6, 247-255.

Record type: Article

Abstract

The research presented in this paper investigates the role of oxidation in the formation of space charge in gamma-irradiated low-density polyethylene after being electrically stressed under dc voltage. Polyethylene plaques both with and without antioxidant were irradiated up to 500kGy using a 60Co gamma source and space charge distributions were measured using the piezoelectric induced pressure wave propagation method. It has been found that a large amount of positive charge evolved adjacent to the cathode in the sample without antioxidant and was clearly associated with oxidation of the near surface. The amount of charge formed for a given applied stress, increased with the dose absorbed by the material. On the other hand space charge in a sample containing antioxidant under the same applied electric stress was negligible even in the sample exposed to 500kGy. The Main process to form space charge is via charge injection rather than charge separationin the sample without antioxidant.

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More information

Published date: March 2003
Keywords: Gamma irradiation, charge decay, low-density polyethylene, oxidation, piezoelectric induced pressure propagation method, space charge formation
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 260182
URI: http://eprints.soton.ac.uk/id/eprint/260182
ISSN: 0969-806X
PURE UUID: 6d1a78cc-850a-4223-a785-3d7be3872682

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Date deposited: 09 Dec 2004
Last modified: 19 Jul 2019 22:39

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