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On the effects of molecular composition, morphology and ageing on the electrical properties of polyethylene

On the effects of molecular composition, morphology and ageing on the electrical properties of polyethylene
On the effects of molecular composition, morphology and ageing on the electrical properties of polyethylene
Polyethylene is widely used as the basis for the insulation in high voltage cables, commonly, in the form of cross linked low density polyethylene (XLPE). With time, the chemical and electrical properties of the pristine polymer begin to change, depending on the molecular architecture, morphology and ageing processes. In this work, thermal treatment, based on accelerated ageing in air was performed on the exposed surface of polyethylene blend films (HDPE/LDPE) at temperatures above the melting point for various treatment times. The ageing degrees were quantified by Fourier transform infrared (FTIR) spectroscopy, while dielectric spectroscopy was used to investigate the dielectric response. Space charge dynamics were measured using the pulsed electroacoustic (PEA) technique. It was found that the dielectric loss after long treatment times was significantly increased, corresponding with the carbonyl index. Furthermore, space charge results show that homocharge was increased at short treatment time; however, it is noticeable that, after long treatment times, charge injection appeared to be affected by surface oxidation and, in this way ageing has a marked effect on the electrical behaviour of the blend.
889-892
IEEE
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 (2016) On the effects of molecular composition, morphology and ageing on the electrical properties of polyethylene. In 2016 IEEE Conference on Electrical INsulation and Dielectic Phenomena (CEIDP). IEEE. pp. 889-892 . (doi:10.1109/CEIDP.2016.7785554).

Record type: Conference or Workshop Item (Paper)

Abstract

Polyethylene is widely used as the basis for the insulation in high voltage cables, commonly, in the form of cross linked low density polyethylene (XLPE). With time, the chemical and electrical properties of the pristine polymer begin to change, depending on the molecular architecture, morphology and ageing processes. In this work, thermal treatment, based on accelerated ageing in air was performed on the exposed surface of polyethylene blend films (HDPE/LDPE) at temperatures above the melting point for various treatment times. The ageing degrees were quantified by Fourier transform infrared (FTIR) spectroscopy, while dielectric spectroscopy was used to investigate the dielectric response. Space charge dynamics were measured using the pulsed electroacoustic (PEA) technique. It was found that the dielectric loss after long treatment times was significantly increased, corresponding with the carbonyl index. Furthermore, space charge results show that homocharge was increased at short treatment time; however, it is noticeable that, after long treatment times, charge injection appeared to be affected by surface oxidation and, in this way ageing has a marked effect on the electrical behaviour of the blend.

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CEIDP Somyot ASV TA - Accepted Manuscript
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Published date: October 2016
Venue - Dates: Conference on Electrical Insulation and Dielectric Phenomena, Canada, 2016-10-15 - 2016-10-18
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 407341
URI: http://eprints.soton.ac.uk/id/eprint/407341
PURE UUID: fb2591d4-039b-48a2-b505-fe76da57e915
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

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Date deposited: 04 Apr 2017 01:02
Last modified: 18 Feb 2021 17:22

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