Title :
AC aging of impregnated polypropylene films: Effect of oxygen
Author :
Gadoum, A. ; Gosse, B. ; Gosse, J.P.
Author_Institution :
Lab. d´´Electrostatique et de Materiaux Dielectriques, CNRS, Grenoble, France
Abstract :
The mechanism of O2 enhanced AC aging of impregnated PP (polypropylene) films is elucidated. Analysis by gas chromatography of the liquid and by FTIR (Fourier-transform infrared) of the polymer show an electrically enhanced oxidation rate of liquid and polymer. The electrical stress acts mainly at the initiation step by creating the first radicals. The oxidation byproducts of the liquid do not influence the degradation rate, and AC aging of PP films is mainly due to the scission of macromolecular chains greatly enhanced by O2
Keywords :
polymer films; AC aging; FTIR spectra; O2 enhanced; PP films; degradation rate; electrical stress; electrically enhanced oxidation rate; gas chromatography; impregnated polypropylene films; liquid; macromolecular chains; mechanism; oxidation byproducts; polymer; radicals; scission; Accelerated aging; Breakdown voltage; Electrodes; Gas chromatography; Oxidation; Oxygen; Polymers; Power capacitors; Thermal degradation; Thermal stresses;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids,1993., ICDL '93., IEEE 11th International Conference on
Conference_Location :
Baden-Dattwil
Print_ISBN :
0-7803-0791-7
DOI :
10.1109/ICDL.1993.593986
