Space charge formation in gamma-irradiated low-density polyethylene

Author

Chen, G. ; Banford, H.M. ; Davies, A.E.

Author_Institution

Dept. of Electr. Eng., Southampton Univ., UK

fYear

1996

fDate

25-30 Sep 1996

Firstpage

195

Lastpage

200

Abstract

Energetic ionising radiation can alter the chemical structure of polymeric materials and may also give rise to the presence of trapped charge within the material, the trapping characteristics of which may be influenced by these radiation-induced structural alternations. In the present work, space charge formation in irradiated low-density polyethylene (LDPE) was investigated using the laser induced pressure pulse (LIPP) technique. Specimens of LDPE, ~350 μm thick, were irradiated in a ⁶⁰Co γ-source in air at ambient temperature to various doses and the results indicate that space charge distributions are dependent on both dose and applied electric stress and the length of time for which the stress is applied

Keywords

chemical structure; gamma-ray effects; polyethylene insulation; polymer films; polymer structure; space charge; 350 mum; 5E3 to 5E5 Gy; ⁶⁰Co γ-source; LDPE; applied electric stress dependence; chemical structure; dose dependence; energetic ionising radiation; gamma-irradiation; laser induced pressure pulse technique; low-density polyethylene; radiation-induced structural alternations; space charge formation; trapped charge; Chemical lasers; Ionizing radiation; Optical materials; Optical pulses; Polyethylene; Polymers; Space charge; Stress; Temperature dependence; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1996. (ISE 9), 9th International Symposium on

Conference_Location

Shanghai

Print_ISBN

0-7803-2695-4

Type

conf

DOI

10.1109/ISE.1996.578068

Filename

578068