Title :
Electrical conduction phenomena of oil/polymer systems
Author :
Ochiai, S. ; Iwasaki, H. ; Mizutani, T. ; Ieda, M.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
fDate :
29 Oct-2 Nov 1989
Abstract :
Oil-polymer interactions were investigated using various combinations of polymer and oil. The current magnitudes in oil-polymer systems were in the following order: LDPE>HDPE>PP>PET≫FEP. These results are discussed, considering the solubility parameter (SP), the crystallinity of the polymer, and impurities in the polymer. It was found that the magnitude of the charging current in oil-polymer systems cannot be explained by the SP value alone. It is affected by impurities in the polymer (including antioxidant) close to the oil-polymer interface. Antioxidant is extracted from the polymer during sulfuric acid treatment. The treatment of sulfuric acid reduces the current and changes the TSC (thermally stimulated current) spectrum
Keywords :
composite insulating materials; insulating oils; interface phenomena; organic insulating materials; polymers; thermally stimulated currents; FEP; H2SO4 treatment; HDPE; LDPE; PET; PP; TSC spectrum; charging current; crystallinity; electrical conduction phenomena; fluorinated ethylene propylene; high density polyethylene; impurities; low density polyethylene; oil-polymer interaction; oil-polymer interface; oil-polymer systems; polyphenylene; solubility parameter; thermally stimulated current; Crystallization; Current measurement; Impurities; Petroleum; Polyethylene; Polymer films; Positron emission tomography; Steel; Surface charging; Surface discharges;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1989. Annual Report., Conference on
Conference_Location :
Leesburg, VA
DOI :
10.1109/CEIDP.1989.69570
