Charge decay and space charge in corona-charged LDPE

Author

Mizutani, T. ; Taniguchi, Y. ; Ishioka, M.

Author_Institution

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

fYear

2002

fDate

2002

Firstpage

15

Lastpage

18

Abstract

The surface charge decay and space charge distribution in corona-charged low-density polyethylene (LDPE) were investigated. The space charge distribution was measured at 30°C with the pulsed electro-acoustic (PEA) method, where a corona charged specimen was set between a semiconductive electrode and an Al electrode. The space charge distributions in LDPE were quite different between corona charging and DC voltage charging. They also depended on the kind of low-density polyethylene, LDPE polymerized with the high-pressure process and m-LDPE polymerized with metallocene catalysts. The surface charge decay of corona-charged polyethylene is slower for m-LDPE than for LDPE. Especially, positive charge is very stable for m-LDPE. These results were discussed considering the morphology of polyethylene.

Keywords

corona; polyethylene insulation; space charge; surface charging; surface potential; 30 degC; corona charging; corona-charged LDPE; high-pressure process; low-density polyethylene; metallocene catalysts; polyethylene morphology; pulsed electro-acoustic method; space charge distribution; stable positive charge; surface charge decay; Charge measurement; Corona; Current measurement; Electrodes; Polyethylene; Polymers; Pulse measurements; Pulsed electroacoustic methods; Space charge; Surface morphology;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on

Print_ISBN

0-7803-7560-2

Type

conf

DOI

10.1109/ISE.2002.1042934

Filename

1042934