Hygrothermal stress evolution during weathering in organic coatings / Dan Y. Perera in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 833 (06/1994)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 833 (06/1994) . - p. 83-88 Titre : Hygrothermal stress evolution during weathering in organic coatings Type de document : texte imprimé Auteurs : Dan Y. Perera, Auteur ; Maarten Oosterbroek, Auteur Année de publication : 1994 Article en page(s) : p. 83-88 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Contraintes (mécanique) Copolymère acrylique mélamine Copolymère uréthane acrylique Essais accélérés (technologie) Relaxation des contraintes Vernis -- Effets du climat Index. décimale : 667.9 Revêtements et enduits Résumé : Hygrothermal stresses developing in two clearcoats exposed to two types of accelerated weathering were determined. The physical and chemical changes induced by weathering produce a continuous increase of tensile and compressive stresses which ultimately causes it to crack. It was found that the stress magnitude and the duration of exposure at which the coating cracks depend on the type of the accelerated weathering. Also, the rate of stress relaxation decreases with duration of weathering. However, the shape of curves describing the stress dependence on duration of weathering is the same provided that the main mechanism of coating degradation does not change. When combined with other techniques, the measurement of stress appears to be an important way of studying coating durability (...) Note de contenu : - EXPERIMENTAL: Materials - Accelerated Wheathering - Methods - RESULTS : Physical aging - Type of accelerated Wheathering - Stress relaxation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18652 [article]

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