Conductivity and space in PE with additives

Author

Holboell, Joachim ; Henriksen, Mogens ; Hjerrild, Jesper

Author_Institution

Sec. of Electr. Power Eng., Tech. Univ. Denmark, Lyngby, Denmark

Volume

3

fYear

2003

fDate

1-5 June 2003

Firstpage

851

Abstract

Temperature dependent conductivity and space charge formation was measured in metallocene catalyst polymerized polyethylene samples of planar geometry with semiconductive electrodes. The temperature dependence of the conductivity was determined based on leakage current measurements at variable temperatures. Space charge formation under an applied electrical field of 20 kV/mm was investigated by means of the pulse-electro-acoustic method (PEA) at room temperature. The results were compared to space charge formation and conductivity in common LDPE. The measurements showed considerable differences between materials and only minor influence of crosslinking process and the addition of antioxidant with respect to the electrical properties of the material. Possible correlations between conductivity and space charge formation are discussed in the paper. The relevance of the findings for application to extruded high voltage cables will be discussed.

Keywords

additives; catalysts; dielectric materials; electrical conductivity; leakage currents; polymers; pulsed electroacoustic methods; space charge; 293 to 298 K; LDPE; additives; antioxidant addition; applied electrical field; crosslinking process; electrical properties; extruded high voltage cables; leakage current measurement; low density polyethylene; metallocene catalyst polymerized polyethylene; pulse-electro-acoustic method; room temperature; semiconductive electrodes; space charge formation; temperature dependent conductivity; Additives; Charge measurement; Conducting materials; Conductivity measurement; Current measurement; Polyethylene; Polymers; Space charge; Temperature dependence; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on

ISSN

1081-7735

Print_ISBN

0-7803-7725-7

Type

conf

DOI

10.1109/ICPADM.2003.1218555

Filename

1218555