Title :
Polarization behaviour in polymers
Author :
Munaro, M. ; Moreno, L. ; Scarpa, P.C.N. ; Das-Gupta, D.K.
Author_Institution :
LACTEC, UFPR, Curitiba, Brazil
Abstract :
Dielectric polarization may be induced in polar and nonpolar electrically insulating polymers by externally applied electric fields. Such polarization may arise from dipolar orientation and injected space charges in polar and nonpolar materials respectively. Present work reports the results of a study of the nature of field induced polarization in cross-linked polyethylene (XLPE) by laser intensity modulation method (LIMM) and dielectric spectroscopy. An analysis of the data obtained by these two techniques, together with FTIR and DSC results, shows that the induced polarization may originate from a simultaneous presence of both the dipolar orientation and injected space charges
Keywords :
Fourier transform spectra; XLPE insulation; dielectric polarisation; differential scanning calorimetry; infrared spectra; space charge; DSC; FTIR; XLPE; cross-linked polyethylene; dielectric polarization; dielectric spectroscopy; dipolar orientation; externally applied electric fields; injected space charges; laser intensity modulation method; nonpolar electrically insulating polymers; polar electrically insulating polymers; polarization behaviour; polymers; Dielectric materials; Dielectrics and electrical insulation; Electrochemical impedance spectroscopy; Intensity modulation; Optical materials; Plastic insulation; Polarization; Polyethylene; Polymers; Space charge;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.804583
