Capillary condensation-induced anomalous water sorption in urethane-based coatings exposed to high humidity conditions / A. Allahdini in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 299-306 Titre : Capillary condensation-induced anomalous water sorption in urethane-based coatings exposed to high humidity conditions Type de document : texte imprimé Auteurs : A. Allahdini, Auteur ; H. Yazdani Ahmadabadi, Auteur ; S. Rastegar, Auteur ; Z. Ranjibar, Auteur Année de publication : 2016 Article en page(s) : p. 299-306 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Capillarité Condensation Humidité Humidité -- Absorption:Eau -- Absorption Polyuréthanes Revêtements:Peinture Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, the water uptake of crosslinked urethane-based coatings in high humidity conditions as a function of crosslinking temperature was investigated. The water uptake values were measured using an electrochemical impedance spectroscopy technique by applying the Brasher–Kingsbury procedure. Water uptake values as high as 200% were observed in the current research. These anomalous results were explained based on capillary condensation of diffused water molecules in the nano-metrically (or nano-scale) rough hydrophilic surfaces of the pores formed by thermal degradation of the polyurethane network. The water uptake value is at its minimum when an effectively pore-free tight network formed at moderate crosslinking conditions. DOI : 10.1007/s11998-015-9746-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9746-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26114 [article]

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