Title :
Influence of the interface/interphase on polarization phenomena in model composites
Author :
Lavergne, C. ; Chatain, D. ; Lacabanne, C. ; Gerard, J.F.
Author_Institution :
Solid State Phys. Lab., Univ. Paul Sabatier, Toulouse, France
Abstract :
Thermally stimulated current (TSC) spectroscopy has been applied to the study of interface/interphase in model composites. Three DGEBA-DDA matrix samples have been analyzed: matrix, matrix+silane treated beads, and matrix+elastomer coated beads. Below room temperature, two polarization phenomena are observed in all samples. The relaxation mode associated with the dielectric manifestation of the glass transition of the elastomeric interlayer has also been observed. Above room temperature, the TSC spectra show the existence of a complex relaxation mode. Analysis of the relaxation times shows compensation phenomena with parameters characteristic of the interface/interphase
Keywords :
charge compensation; composite insulating materials; dielectric polarisation; dielectric relaxation; electrets; electrical conductivity transitions; polymers; space charge; thermally stimulated currents; -150 to 110 degC; DGEBA-DDA matrix; compensation phenomena; composites; dielectric manifestation; elastomeric interlayer; electrets; glass transition; interface/interphase; matrix+elastomer coated beads; matrix+silane treated beads; polarization phenomena; relaxation mode; thermally stimulated current; Composite materials; Dielectrics; Glass; Laboratories; Physics; Polarization; Solid modeling; Solid state circuits; Spectroscopy; Temperature;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167192
