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Planar aqueous electrode technique for polymer impedance spectroscopy
Author(s) -
Bai T.,
Bradshaw R.D.,
Ramanathan T.,
Nunalee F.N.,
Shull K.R.,
Mason T.O.,
Brinson L.C.
Publication year - 2009
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.21276
Subject(s) - materials science , electrode , polymer , dielectric spectroscopy , aqueous solution , dielectric , ionic bonding , ionic conductivity , polyimide , conductive polymer , composite material , chemical engineering , analytical chemistry (journal) , electrochemistry , electrolyte , optoelectronics , ion , chemistry , organic chemistry , layer (electronics) , engineering
In this article, we develop an aqueous electrode technique that can adapt to complex sample geometries while maintaining perfect contact between the electrodes and the measured sample. In contrast to surface deposited electrodes, the aqueous electrode technique measures the ionic conduction of the polymer sample instead of the inherent dielectric properties of the polymer. Polymer ionic conduction is often related to the polymer thermodynamic state, which itself is closely linked to many other polymer properties. As such, the aqueous electrode method provides an approach to conduct in situ monitoring of polymer samples subjected to degradation; changes in the impedance provide an indication of polymer sample degradation. This article presents the aqueous electrode setup and discusses experimental results obtained using it. Changes in the impedance response of PVC and polyimide films due to moisture absorption, ionic conduction, pinholes, chemical degradation, and temperature are presented. POLYM. ENG. SCI., 2009. © 2008 Society of Plastics Engineers