Detrended fluctuation analysis of UV degradation in a polyurethane coating / Mark A. Johnson in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 941 (06/2003)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 941 (06/2003) . - p. 51-57 Titre : Detrended fluctuation analysis of UV degradation in a polyurethane coating Type de document : texte imprimé Auteurs : Mark A. Johnson, Auteur ; Paul J. Cote, Auteur Année de publication : 2003 Article en page(s) : p. 51-57 Note générale : Bibliogr. Langues : Américain (ame) Tags : Propriété  surface  Méthode  analyse  Rugosité  Feuil  Rayonnement  UV  Analyse  Peinture  Dégradation  photochimique  Polyuréthane Index. décimale : 667.9 Revêtements et enduits Résumé : Changes in the intrinsic structure of paint surfaces resulting from extended UV exposure can significantly alter the appearance of paint due to a breakdown in the resin that binds the pigments and flattening agents. In this study, the coating structure of a solvent-based polyurethane was analyzed to establish correlations between the intrinsic spatial scaling properties of the coating and UV exposure time. Atomic force microscopy and laser scanning confocal microscopy were employed to map surface structures over a range of scales from 80 nm to 80 mm. The roughness of the polyurethane surface was characterized in terms of scaling exponents using detrended fluctuation analysis to identify long-range, power law relations, and to correct for inhomogeneities in the surface structure. The time-dependence of the roughening process was also determined and correlated with changes in gloss. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5581 [article]

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