Influence of molecular structure on high-field phenomena in LDPE films

Author

Banmongkol, C. ; Mori, T. ; Mizutani, T. ; Ishioka, M. ; Ishino, I.

Author_Institution

Dept. of Electr. Eng., Nagoya Univ., Japan

fYear

1995

fDate

17-20 Sep 1995

Firstpage

399

Lastpage

402

Abstract

The authors have investigated the high-field phenomena in low-density polyethylene (LDPE). The objective of this paper is to study the relationship between molecular structure and the high-field phenomena at high temperature near the melting point of LDPE. The results can be summarized as follows. (1) The high-field current and the breakdown strength strongly depend upon film density determined by the concentration of methyl group. (2) The breakdown strength can be qualitatively estimated from the measurement of the high-field current. This incident as well as the above result suggests that a thermal process takes part in the dielectric breakdown of LDPE film at 90°C. (3) Both the type and the concentration of carbonyl groups affect the high-field current of LDPE

Keywords

electric breakdown; electric strength; high field effects; polyethylene insulation; polymer films; polymer structure; 90 degC; LDPE films; breakdown strength; carbonyl groups; dielectric breakdown; film density; high-field phenomena; low-density polyethylene; methyl group concentration; molecular structure; production technologies; thermal process; Breakdown voltage; Chemical industry; Crystallization; Current density; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Plastic insulation; Polyethylene; Polymers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 1995. International Symposium on

Conference_Location

Tokyo

Print_ISBN

4-88686-047-8

Type

conf

DOI

10.1109/ISEIM.1995.496593

Filename

496593