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Dielectric characterization of water sorption in epoxy resin matrices
Author(s) -
Maffezzoli A. M.,
Peterson L.,
Seferis J. C.,
Kenny J.,
Nicolais L.
Publication year - 1993
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760330204
Subject(s) - epoxy , materials science , sorption , dielectric , characterization (materials science) , composite material , chemical engineering , organic chemistry , adsorption , nanotechnology , optoelectronics , chemistry , engineering
Water sorption in epoxy based materials was analyzed by dielectric spectroscopy using remote sensors. A method to determine diffusion coefficients from the changes in permittivity during water absorption is proposed and was verified experimentally by comparison with standard water gain measurements. Although the technique is limited by electrode polarization phenomena, it is sensitive to the presence of water molecules and is capable of detecting different levels of water concentration as a function of frequency. The utilization of remote sensors demonstrated the capability of dielectric analysis to be applied both in the laboratory environment, and on a larger scale, as a nondestructive technique for monitoring environmental changes in actual polymer matrix composite parts.