Hydration properties of PHEA/Kevlar composites studied by dielectric, DSC and sorption isotherm measurements

Author

Kyritis, A. ; Pissis, P. ; Ribelles, J. L Gomez ; Pradas, M. Monleon

Author_Institution

Dept. of Phys., Athens Univ., Greece

fYear

1991

fDate

25-27 Sep 1991

Firstpage

215

Lastpage

220

Abstract

The authors present a detailed study of the dielectric properties of poly(hydroxyethyl acrylate) (PHEA) and PHEA/Kevlar composites by means of the thermally stimulated depolarization currents (TSDC) method, partial heating, and thermal sampling techniques in a wide range of temperatures and water contents. The measurements make it possible to investigate the influence of moisture on the different relaxation mechanisms and the different binding modes of water. Additional information is obtained from differential scanning calorimetry (DSC) and sorption isotherm measurements

Keywords

composite materials; dielectric depolarisation; dielectric relaxation; electrets; moisture; polymers; solvation; sorption; thermal analysis; thermally stimulated currents; DSC; PHEA/Kevlar composites; binding modes; dielectric properties; differential scanning calorimetry; electret; hydration properties; moisture; partial heating; poly(hydroxyethyl acrylate); relaxation mechanisms; sorption isotherm measurements; thermal sampling; thermally stimulated depolarization currents; water contents; Calorimetry; Current measurement; Dielectric materials; Dielectric measurements; Laboratories; Physics; Polymers; Temperature distribution; Thermodynamics; Water;

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.1991.167209

Filename

167209