Title :
Correlation between FTIR spectra and birefringence measurements in XLPE cable insulation
Author :
David, E. ; Fourmigué, J.M. ; Parpal, J.-L. ; Crine, J.-P.
Author_Institution :
Inst. de Recherche d´´Hydro-Quebec, Varennes, Que., Canada
Abstract :
The authors report infrared (IR) absorption measurements conducted on laboratory-aged and unaged cross-linked polyethylene (XLPE) cable samples. Variations in the IR absorbance of the methyl group (1377 cm -1) and the carbonyl groups (~1700 cm-1) were recorded as a function of both radial and angular coordinates for the samples. These variations were found to be strongly correlated with optical birefringence measurements made on the same samples. Morphological parameters and IR absorption differ in regions containing residual stresses compared to unstressed regions, in both aged and unaged cables. It is believed that these variations originate from nonuniform mechanical and thermal stresses during manufacturing
Keywords :
Fourier transform spectra; ageing; birefringence; cable insulation; internal stresses; organic insulating materials; polymer structure; polymers; power cables; spectrochemical analysis; thermal stresses; 1377 cm-1; 1700 cm-1; FTIR spectra; IR absorbance; XLPE cable insulation; angular coordinates; carbonyl groups; laboratory-aged; methyl group; morphological parameters; nonuniform mechanical stresses; optical birefringence; radial coordinates; residual stresses; thermal stresses; unaged; Aging; Birefringence; Cable insulation; Cables; Dielectrics and electrical insulation; Laboratories; Optical sensors; Oxidation; Plastic insulation; Polymers;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283150
