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Charge trapping and detrapping in polymeric materials

Charge trapping and detrapping in polymeric materials
Charge trapping and detrapping in polymeric materials
Space charge formation in polymeric materials can cause some serious concern for design engineers as the electric field may severely be distorted, leading to part of the material being overstressed. At the worst, this may result in material degradation and possibly premature failure. It is therefore important to understand charge generation, trapping, and detrapping processes in the material. In the present paper, the characteristics of charge trapping and detrapping in low density polyethylene under dc electric field have been investigated using the pulsed electroacoustic technique. It has been found that the charge decay shows very different characteristics for the sample with different periods of electric field application. To explain the results a simple trapping and detrapping model based on two trapping levels has been proposed. Qualitative analysis revealed the similar features to those observed experimentally.
0021-8979
123707
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Xu, Zhiqiang
8219b80e-9d26-415b-81d8-08bda9f6218d
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Xu, Zhiqiang
8219b80e-9d26-415b-81d8-08bda9f6218d

Chen, George and Xu, Zhiqiang (2009) Charge trapping and detrapping in polymeric materials. Journal of Applied Physics, 106, 123707.

Record type: Article

Abstract

Space charge formation in polymeric materials can cause some serious concern for design engineers as the electric field may severely be distorted, leading to part of the material being overstressed. At the worst, this may result in material degradation and possibly premature failure. It is therefore important to understand charge generation, trapping, and detrapping processes in the material. In the present paper, the characteristics of charge trapping and detrapping in low density polyethylene under dc electric field have been investigated using the pulsed electroacoustic technique. It has been found that the charge decay shows very different characteristics for the sample with different periods of electric field application. To explain the results a simple trapping and detrapping model based on two trapping levels has been proposed. Qualitative analysis revealed the similar features to those observed experimentally.

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Published date: December 2009
Organisations: EEE

Identifiers

Local EPrints ID: 268349
URI: https://eprints.soton.ac.uk/id/eprint/268349
ISSN: 0021-8979
PURE UUID: faa0377c-355a-4071-b977-02b7d83fb8ab

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Date deposited: 04 Jan 2010 14:16
Last modified: 18 Jul 2017 06:55

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