The influence of structure on water treeing in crosslinked polyethylene: tree morphology and the influence of organic contaminants

Author

Karakelle, M. ; Phillips, P.J.

Author_Institution

Dept. of Mater. Sci. & Eng., Utah Univ., Salt Lake City, UT, USA

Volume

24

Issue

6

fYear

1989

fDate

12/1/1989 12:00:00 AM

Firstpage

1101

Lastpage

1108

Abstract

Trace amounts of ethylene glycol present in crosslinked polyethylene during thermal aging are shown in experiments on miniature cables to exert a major accelerating effect on water-tree populations and growth. The morphology is changed from bow-tie to acicular. Few water trees grown under these conditions show foreign particles or bubbles as initiation sites. Vented trees are shown to be fan-shaped and occur in parallel arrays along the miniature cable axis under all conditions studied

Keywords

ageing; cable insulation; electric breakdown of solids; organic insulating materials; polymers; acicular; bow-tie; bubbles; crosslinked polyethylene; ethylene glycol; fan-shaped; initiation sites; miniature cables; organic contaminants; parallel arrays; thermal aging; tree morphology; vented trees; water treeing; water-tree populations; Accelerated aging; Annealing; Anti-freeze; Classification tree analysis; Conductors; Materials science and technology; Morphology; Polyethylene; Testing; Trees - insulation;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.46344

Filename

46344