Title :
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
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;
Conference_Titel :
Electrets, 1996. (ISE 9), 9th International Symposium on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-2695-4
DOI :
10.1109/ISE.1996.578068
