TY - JOUR
T1 - Dielectric analysis of water uptake in polymer coating using spatially defined Fick's law and mixing rule
AU - Ollivier-Lamarque, Lucas
AU - Lallart, Mickaël
AU - Mary, Nicolas
AU - Uchimoto, Tetsuya
AU - Livi, Sébastien
AU - Marcelin, Sabrina
AU - Miki, Hiroyuki
N1 - Funding Information:
L. Ollivier-Lamarque gratefully acknowledges the support of Kamei foundation. M. Lallart and H. Miki gratefully acknowledge the support of JSPS through invitational fellowship grant number L19530, as well as INSA-Lyon for its support through the CRCT program.
Funding Information:
This work has been performed in the framework of the POMADE project supported by ELyT Global LIA and IFS Lyon Center, and has been partly funded under the Collaborative Research Project of Lyon Center, IFS, Tohoku University (grant number J19Ly02).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11
Y1 - 2020/11
N2 - Due to their outstanding properties such as thermal insulation, optical transparency or adhesion for instance, thermosetting coatings based on epoxy prepolymers offer many attractive advantages. In the framework of investigating their ageing under wet conditions, this study exposes an original approach taking into account the water penetration depth. This allows the derivation of local permittivity using mixing rule, ultimately yielding a physically-based explanation of the globally measured capacitance of immersed polymer coupons placed between circular electrodes and its link to gravimetric results. Theoretical predictions show good agreement with experimental measurements on epoxy-amine coupons both in terms of mass uptake and dielectric constants (including frequency dependence), bringing new insights in uptake mechanisms and associated measurement techniques.
AB - Due to their outstanding properties such as thermal insulation, optical transparency or adhesion for instance, thermosetting coatings based on epoxy prepolymers offer many attractive advantages. In the framework of investigating their ageing under wet conditions, this study exposes an original approach taking into account the water penetration depth. This allows the derivation of local permittivity using mixing rule, ultimately yielding a physically-based explanation of the globally measured capacitance of immersed polymer coupons placed between circular electrodes and its link to gravimetric results. Theoretical predictions show good agreement with experimental measurements on epoxy-amine coupons both in terms of mass uptake and dielectric constants (including frequency dependence), bringing new insights in uptake mechanisms and associated measurement techniques.
KW - Dielectric analysis
KW - Gravimetry
KW - Polymer coating
KW - Thermosetting coating
KW - Water uptake
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U2 - 10.1016/j.porgcoat.2020.105846
DO - 10.1016/j.porgcoat.2020.105846
M3 - Article
AN - SCOPUS:85086904924
SN - 0033-0655
VL - 148
JO - Progress in Organic Coatings
JF - Progress in Organic Coatings
M1 - 105846
ER -