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The influence of thermally aged surface of polyethylene blend films on space charge and charge transport dynamics

The influence of thermally aged surface of polyethylene blend films on space charge and charge transport dynamics
The influence of thermally aged surface of polyethylene blend films on space charge and charge transport dynamics
In high voltage cables, polyethylene is widely used as the insulation. With temperature, the physicochemical properties of polyethylene are gradually changed through thermal ageing mechanisms. In this paper, experiments were carried out to explore the effect of a thermally aged surface of polyethylene blend (HDPE/LDPE) films on the space charge and charge transport dynamics in the bulk associated with positive and negative charge injection. Thermal treatment was used to treat one surface of the specimens, which was exposed to air at a high temperature for various short times. The rate of oxidation on the surface was determined by the ATR-FTIR technique. The pulsed electroacoustic (PEA) technique and DC conductivity were used to investigate space charge and charge transport dynamics respectively. It was found that the oxidized surface resulted in a significant changes in the amount of accumulated space charge and the DC conductivity initially decreased below that of the reference sample. However, a severely oxidized surface resulted in the increases in both space charge accumulation and conductivity compared with the unaged reference. The general trends did not differ greatly when the anode and cathode contacted the oxidized surface, despite the different types of charge injection (i.e. negative and positive injection).
oxidized surface, suppressible layer, conductive laryer
Tantipattarakul, Somyot
ce711fa4-35a2-4880-a83e-fd10e4bc3cfb
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Tantipattarakul, Somyot
ce711fa4-35a2-4880-a83e-fd10e4bc3cfb
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c

Tantipattarakul, Somyot, Vaughan, Alun and Andritsch, Thomas (2017) The influence of thermally aged surface of polyethylene blend films on space charge and charge transport dynamics. (doi:10.23919/ISEIM.2017.8088754).

Record type: Other

Abstract

In high voltage cables, polyethylene is widely used as the insulation. With temperature, the physicochemical properties of polyethylene are gradually changed through thermal ageing mechanisms. In this paper, experiments were carried out to explore the effect of a thermally aged surface of polyethylene blend (HDPE/LDPE) films on the space charge and charge transport dynamics in the bulk associated with positive and negative charge injection. Thermal treatment was used to treat one surface of the specimens, which was exposed to air at a high temperature for various short times. The rate of oxidation on the surface was determined by the ATR-FTIR technique. The pulsed electroacoustic (PEA) technique and DC conductivity were used to investigate space charge and charge transport dynamics respectively. It was found that the oxidized surface resulted in a significant changes in the amount of accumulated space charge and the DC conductivity initially decreased below that of the reference sample. However, a severely oxidized surface resulted in the increases in both space charge accumulation and conductivity compared with the unaged reference. The general trends did not differ greatly when the anode and cathode contacted the oxidized surface, despite the different types of charge injection (i.e. negative and positive injection).

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More information

Published date: 30 October 2017
Keywords: oxidized surface, suppressible layer, conductive laryer

Identifiers

Local EPrints ID: 426271
URI: http://eprints.soton.ac.uk/id/eprint/426271
PURE UUID: c0cfb661-dda7-446f-8a5f-338e47abdde3
ORCID for Somyot Tantipattarakul: ORCID iD orcid.org/0000-0001-5814-1277
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X

Catalogue record

Date deposited: 21 Nov 2018 17:30
Last modified: 18 Feb 2021 17:22

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