The influence of thermal-oxidative ageing on electrical properties of polypropylene
The influence of thermal-oxidative ageing on electrical properties of polypropylene
Polypropylene (PP) is a potential recyclable insulation material for high voltage direct current (HVDC) cable application. During operation, cables are exposed to various stresses which can accelerate the ageing reactions in insulators in terms of physical and chemical changes, and subsequently affect electrical performance. In present work, PP samples have been thermally aged at 150 °c in a fan-assisted oven for various amounts of times. The chemical changes were characterised using Fourier-Transform Infrared (FTIR) spectroscopy to show the extent of ageing. Space charge dynamics were measured by the pulse electroacoustic (PEA) technique and the DC breakdown strength was analysed by Weibull statistics. It has been found that the charge injection near the cathode decreased corresponding with the concentration of carbonyl groups during ageing periods, while slightly increased injection appears in the bulk observed in severely aged samples. The DC breakdown strength shows an increase for the auto-oxidation period and reduced when it comes to the further ageing period.
789-792
Wu, Xiwen
cfe7238e-9e2c-4c1e-b0b5-e3e6738fbeaf
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
3 July 2022
Wu, Xiwen
cfe7238e-9e2c-4c1e-b0b5-e3e6738fbeaf
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wu, Xiwen, Andritsch, Thomas and Chen, George
(2022)
The influence of thermal-oxidative ageing on electrical properties of polypropylene.
In ICD 2022 - IEEE 2022 4th International Conference on Dielectrics, Proceedings.
IEEE.
.
(doi:10.1109/ICD53806.2022.9863533).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Polypropylene (PP) is a potential recyclable insulation material for high voltage direct current (HVDC) cable application. During operation, cables are exposed to various stresses which can accelerate the ageing reactions in insulators in terms of physical and chemical changes, and subsequently affect electrical performance. In present work, PP samples have been thermally aged at 150 °c in a fan-assisted oven for various amounts of times. The chemical changes were characterised using Fourier-Transform Infrared (FTIR) spectroscopy to show the extent of ageing. Space charge dynamics were measured by the pulse electroacoustic (PEA) technique and the DC breakdown strength was analysed by Weibull statistics. It has been found that the charge injection near the cathode decreased corresponding with the concentration of carbonyl groups during ageing periods, while slightly increased injection appears in the bulk observed in severely aged samples. The DC breakdown strength shows an increase for the auto-oxidation period and reduced when it comes to the further ageing period.
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Published date: 3 July 2022
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© 2022 IEEE.
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4th IEEE International Conference on Dielectrics, ICD 2022, , Palermo, Italy, 2022-07-03 - 2022-07-07
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Local EPrints ID: 509921
URI: http://eprints.soton.ac.uk/id/eprint/509921
PURE UUID: f9d5b33b-e824-434d-96eb-bd686172899a
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Date deposited: 10 Mar 2026 17:58
Last modified: 11 Mar 2026 02:46
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Author:
Xiwen Wu
Author:
Thomas Andritsch
Author:
George Chen
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