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Open AccessCommunication

Use of Grafted Voltage Stabilizer to Enhance Dielectric Strength of Cross-Linked Polyethylene

1
Key laboratory of Engineering Dielectrics and Its Application, Ministry of Education, College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
2
Technical Physics Institute of Heilongjiang Academy of Sciences, Harbin 150086, China
3
Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(1), 176; https://doi.org/10.3390/polym11010176
Received: 29 November 2018 / Revised: 13 January 2019 / Accepted: 14 January 2019 / Published: 20 January 2019
(This article belongs to the Special Issue Synthesis and Application of Conjugated Polymers)
Aromatic voltage stabilizers can improve the dielectric properties of cross-linked polyethylene (XLPE); however, their poor compatibility with XLPE hinders their practical application. Improving the compatibility of aromatic voltage stabilizers with XLPE has, therefore, become a new research goal. Herein 1-(4-vinyloxy)phenylethenone (VPE) was prepared and characterized. It can be grafted onto polyethylene molecules during the cross-linking processes to promote stability of the aromatic voltage stabilizers in XLPE. Fourier transform infrared spectroscopy confirmed that VPE was successfully grafted onto XLPE, and effectively inhibited thermal migration. Thermogravimetric analysis showed that the grafted VPE/XLPE composite exhibits a better thermal stability than a VPE/PE blend composite. Evaluation of the electrical properties showed that the breakdown strength and electrical tree initiation voltage of the VPE/XLPE composite were increased by 15.5% and 39.6%, respectively, when compared to those of bare XLPE. After thermal aging, the breakdown strength and electrical tree initiation voltage of the VPE/XLPE composite were increased by 9.4% and 25.8%, respectively, in comparison to those of bare XLPE, which indicates that the grafted voltage stabilizer can effectively inhibit its migration and enhance the stability of the composite material. View Full-Text
Keywords: cross-linked polyethylene; grafted voltage stabilizer; breakdown strength; electrical tree initiation voltage cross-linked polyethylene; grafted voltage stabilizer; breakdown strength; electrical tree initiation voltage
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MDPI and ACS Style

Dong, W.; Wang, X.; Tian, B.; Liu, Y.; Jiang, Z.; Li, Z.; Zhou, W. Use of Grafted Voltage Stabilizer to Enhance Dielectric Strength of Cross-Linked Polyethylene. Polymers 2019, 11, 176.

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