IEEE ICHVE 2022 / 1-PAGE ABSTRACT

Effect of Hydrolyzable Chlorine Content on Electrical Properties of Epoxy/Al₂O₃ Composites

Yushun Zhao¹, Yuchen Liu¹, Yufan Xu¹, Kerong Yang¹, Hao Shen¹, Cheng Yan<sup>1

1</sup>School of Electrical Engineering and Automation , Hefei University of Technology

Hefei, China

yushunzhao@126.com, 273594299@qq.com, 3171193668@qq.com

                 yangkerong1993@126.com, 2019110451@mail.hfut.edu.cn, 1142106591@qq.com

As the working voltage and frequency of various electrical equipment increase, enhancing the requirements for the electrical properties of epoxy resin composites used as the basic insulating materials for advanced electrical equipment is crucial. However, in the process of material production, a small amount of hydrolyzable chlorine from the by-product chlorohydrin ether will affect the electrical properties of epoxy composites. In view of the lack of research work in this field, epoxy/Al₂O₃ composite was selected as the object to study the effect of hydrolysable chlorine content on it in the paper.

Four kinds of epoxy/Al₂O₃ composite samples with different hydrolyzable chlorine content were obtained by adding different quality of self-made chlorohydrin ether into bisphenol A epoxy resin. The electrical such as breakdown strength, dielectric constant, dielectric loss factor and volume resistivity of the material samples were tested, the effect of hydrolyzable chlorine content on the electrical properties of this kind of epoxy composites was obtained.       

With the increase of hydrolyzable chlorine content in epoxy resin, the breakdown strength of epoxy/Al₂O₃ composite samples gradually increases and the volume resistivity decreases obviously. The dielectric constant and dielectric loss factor decrease slightly on the whole due to the increasing content. This is consistent with the existing results and theories.

The strong attraction of Cl atom in hydrolyzable chlorine to electrons, the change of free volume of epoxy composite system and internal Ionic conductivity caused by hydrolyzable chlorine will have a certain impact on the electrical properties of epoxy/Al₂O₃ composite.