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Acetylated SEBS Enhanced DC Insulation Performances of Polyethylene

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
Institute of Radiation Medicine, China Academy of Medical Science & Peking Union Medical college, Tianjin 300192, China
Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China
Technical Physics Institute of Heilongjiang Academy of Sciences, Harbin 150086, China
Authors to whom correspondence should be addressed.
Polymers 2019, 11(6), 1033;
Received: 2 April 2019 / Revised: 27 May 2019 / Accepted: 4 June 2019 / Published: 11 June 2019
(This article belongs to the Special Issue Polymers for Electronic Applications)
PDF [4678 KB, uploaded 11 June 2019]


Acetophenone can significantly improve the dielectric properties of polyethylene (PE) insulation materials. However, it easily migrates from the PE due to its poor compatibility with the material, which limits its application. In this paper, the functional units of acetophenone were modified in polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) by an acetylation reaction, and SEBS was used as the carrier to inhibit the migration of acetophenone. The number of functional units in the acetylated SEBS (Ac-SEBS) was measured by 1H NMR and the effect of the acetylation degree of SEBS on its compatibility with PE was studied. Meanwhile, the effects of Ac-SEBS on PE’s direct current (DC) breakdown strength and space charge accumulation characteristics were investigated. It is demonstrated that Ac-SEBS can significantly improve the field strength of the DC breakdown and inhibit the accumulation of space charge in the PE matrix. This work provides a new approach for the application of aromatic compounds as voltage stabilizers in DC insulation cable materials. View Full-Text
Keywords: polyethylene; voltage stabilizer; insulation material; DC breakdown strength; space charge polyethylene; voltage stabilizer; insulation material; DC breakdown strength; space charge

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Dong, W.; Wang, X.; Jiang, Z.; Tian, B.; Liu, Y.; Yang, J.; Zhou, W. Acetylated SEBS Enhanced DC Insulation Performances of Polyethylene. Polymers 2019, 11, 1033.

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