Electric conductivity of ethylene propylene copolymer: effect of alumina

Author

Zanin, Maria ; Ferreira, G.F.Leal ; Giacometti, J.A.

Author_Institution

Dept. de Engenharia de Mater., Univ. Federal de Sao Carlos, Brazil

fYear

1994

fDate

7-9 Sep 1994

Firstpage

899

Lastpage

904

Abstract

The dependence of the electric conductivity, σ, on the electric field, E, was measured on ethylene propylene (EPDM) copolymer with and without alumina filler. It was found that a Schottky-like charge injection process conjugated to a modified Poole-Frenkel model for the bulk conduction was necessary for accounting the experimental results for samples without alumina filler. However, the experimental results for samples with alumina filler showed that the conductivity σ depends also on the sample thickness suggesting a space-charge perturbed bulk conduction

Keywords

Poole-Frenkel effect; alumina; electrets; electrical conductivity; filled polymers; organic insulating materials; polyethylene insulation; polymer blends; space-charge-limited conduction; Schottky-like charge injection process; alumina filler; bulk conduction; electric conductivity; ethylene propylene copolymer; modified Poole-Frenkel model; sample thickness; Conducting materials; Conductivity measurement; Current measurement; Dielectric losses; Dielectrics and electrical insulation; Displays; Electric variables measurement; Electrodes; Gold; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1994. (ISE 8), 8th International Symposium on

Conference_Location

Paris

Print_ISBN

0-7803-1940-0

Type

conf

DOI

10.1109/ISE.1994.515245

Filename

515245