Space charge distributions in EPDM compounds

Author

Suh, K.S. ; Park, S.K. ; Lee, C.H. ; Kim, S.W. ; Han, S.O.

Author_Institution

Dept. of Mater. Sci., Korea Univ., Seoul, South Korea

Volume

4

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

725

Lastpage

731

Abstract

The formation of space charge in EPDM (ethylene-propylene-diene terpolymer) filled with ATH (alumina trihydrate) or clay has been investigated by measuring charge distributions. It is found that the type and amount of space charge developed in crosslinked EPDM or its compounds is governed by the type of diene in EPDM and the composition of the semicon electrodes. The amount of charge in the EPDM compounds containing 1,4-hexadiene decreases with an increase of ATH content and increases with an increase of clay content. The heat treatment of EPDM compounds in a vacuum oven increases the amount of space charge in them. These features were explained by the effects of low molecular weight molecules present at the surface of fillers. It is found that the homocharge increases as the clay content increases, while EVA decreases the homocharge in the EPDM compounds. Possible reasons for these results are discussed

Keywords

composite insulating materials; ethylene-propylene rubber; filled polymers; heat treatment; organic insulating materials; space charge; 1,4-hexadiene; ATH; EVA; alumina trihydrate; clay; crosslinked EPDM compound; ethylene-propylene-diene terpolymer; filler; heat treatment; homocharge; semicon electrode; space charge distribution; vacuum oven; Cable insulation; Charge measurement; Chemical engineering; Current measurement; Materials science and technology; Paramagnetic resonance; Polyethylene; Polymers; Space charge; Space heating;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.654687

Filename

654687