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

fYear

1991

fDate

25-27 Sep 1991

Firstpage

111

Lastpage

116

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)

Conference_Location

Berlin

Print_ISBN

0-7803-0112-9

Type

conf

DOI

10.1109/ISE.1991.167192

Filename

167192