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Enhanced high-temperature DC dielectric performance of crosslinked polyethylene with a polystyrene pinning structure

Enhanced high-temperature DC dielectric performance of crosslinked polyethylene with a polystyrene pinning structure
Enhanced high-temperature DC dielectric performance of crosslinked polyethylene with a polystyrene pinning structure

In this paper, we propose a method on improving direct current (DC) dielectric performance by designing a polystyrene (PS) pinning crosslinked polyethylene (XLPE) for the application of insulation materials on high voltage direct current (HVDC) extruded cable. Electrical experimental results show that the addition of PS (1-5 phr, parts per hundreds of resin) can significantly reduce DC conductivity and increase DC breakdown strength of XLPE in the test temperature range of 30-90 °C. Microstructure investigation shows PS distributed as particles could participate in the formation of a crosslinking network with the help of a crosslinking agent, thus forming a polymer pinning structure at the interface between XLPE and PS. It is believed that such a special design strengthens the structure of XLPE, which leads to the improved DC dielectric performance at elevated temperatures. Our findings may contribute a new solution for developing HVDC cable insulation materials.

Crosslinked polyethylene, DC dielectric performance, Pinning structure, Polystyrene
Cao, Liang
6261cdb2-c930-40ad-b06f-1444b65bc4d7
Zhong, Lisheng
25352160-ad90-495d-98e9-579630785b16
Li, Yinge
42a3616f-ecb8-4cd0-8d8d-1ba53ee6698a
Zhang, Kai
9b141382-cd31-4410-9a0a-66c6e47b21a0
Gao, Jinghui
975e4d38-2774-493b-9350-c5fd8ccf2f2b
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Cao, Liang
6261cdb2-c930-40ad-b06f-1444b65bc4d7
Zhong, Lisheng
25352160-ad90-495d-98e9-579630785b16
Li, Yinge
42a3616f-ecb8-4cd0-8d8d-1ba53ee6698a
Zhang, Kai
9b141382-cd31-4410-9a0a-66c6e47b21a0
Gao, Jinghui
975e4d38-2774-493b-9350-c5fd8ccf2f2b
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Cao, Liang, Zhong, Lisheng, Li, Yinge, Zhang, Kai, Gao, Jinghui and Chen, George (2019) Enhanced high-temperature DC dielectric performance of crosslinked polyethylene with a polystyrene pinning structure. Materials, 12 (8), [1234]. (doi:10.3390/ma12081234).

Record type: Article

Abstract

In this paper, we propose a method on improving direct current (DC) dielectric performance by designing a polystyrene (PS) pinning crosslinked polyethylene (XLPE) for the application of insulation materials on high voltage direct current (HVDC) extruded cable. Electrical experimental results show that the addition of PS (1-5 phr, parts per hundreds of resin) can significantly reduce DC conductivity and increase DC breakdown strength of XLPE in the test temperature range of 30-90 °C. Microstructure investigation shows PS distributed as particles could participate in the formation of a crosslinking network with the help of a crosslinking agent, thus forming a polymer pinning structure at the interface between XLPE and PS. It is believed that such a special design strengthens the structure of XLPE, which leads to the improved DC dielectric performance at elevated temperatures. Our findings may contribute a new solution for developing HVDC cable insulation materials.

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materials-12-01234-v2 - Version of Record
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More information

Accepted/In Press date: 12 April 2019
e-pub ahead of print date: 15 April 2019
Keywords: Crosslinked polyethylene, DC dielectric performance, Pinning structure, Polystyrene

Identifiers

Local EPrints ID: 431464
URI: http://eprints.soton.ac.uk/id/eprint/431464
PURE UUID: 7778d040-f25c-4db7-95fb-948fb77c7f42

Catalogue record

Date deposited: 05 Jun 2019 16:30
Last modified: 19 Jul 2019 16:32

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Contributors

Author: Liang Cao
Author: Lisheng Zhong
Author: Yinge Li
Author: Kai Zhang
Author: Jinghui Gao
Author: George Chen

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