Effect of Crystallinity of Polyethylene with Different Densities on Breakdown Strength and Conductance Property

Dawei Li; Liwei Zhou; Xuan Wang; Lijuan He; Xiong Yang

doi:10.3390/ma12111746

Effect of Crystallinity of Polyethylene with Different Densities on Breakdown Strength and Conductance Property

Materials (Basel). 2019 May 29;12(11):1746. doi: 10.3390/ma12111746.

Authors

Dawei Li^{1

2

3}, Liwei Zhou^{4

5}, Xuan Wang^{6

7}, Lijuan He^{8

9}, Xiong Yang¹⁰

Affiliations

¹ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China. [email protected].
² Key Laboratory of Engineering Dielectrics and Its Application Harbin University of Science and Technology, Harbin 150080, China. [email protected].
³ Rongcheng College of Harbin University of Science and Technology, Rongcheng 264300, China. [email protected].
⁴ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China. [email protected].
⁵ Key Laboratory of Engineering Dielectrics and Its Application Harbin University of Science and Technology, Harbin 150080, China. [email protected].
⁶ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China. [email protected].
⁷ Key Laboratory of Engineering Dielectrics and Its Application Harbin University of Science and Technology, Harbin 150080, China. [email protected].
⁸ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China. [email protected].
⁹ Key Laboratory of Engineering Dielectrics and Its Application Harbin University of Science and Technology, Harbin 150080, China. [email protected].
¹⁰ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China. [email protected].

Abstract

In order to study the effects of the crystallinity of polyethylene with different densities on breakdown strength and conductance properties, this paper mainly tests the X-ray diffraction (XRD), different scanning calorimeter (DSC), direct current (DC) breakdown and conductance properties of low-density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), and high-density polyethylene (HDPE), and further analyzes the experimental results separately. The results show that an increase in the density of polyethylene leads to the continuous improvement of crystallinity, and an increase in crystallinity causes a significant decrease in the conduction current at the same field strength. The field strength corresponding to the two turning points in the conductance characteristic curve increases simultaneously.

Keywords: SCLC; breakdown strength; conduction current; crystallinity; polyethylene.

Abstract

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