[article]
| Titre : |
Relationship between chemical degradation and thickness loss of an amine-cured epoxy coating exposed to different UV environments |
| Type de document : |
texte imprimé |
| Auteurs : |
Aziz Rezig, Auteur ; Tinh Nguyen, Auteur ; David Martin, Auteur ; Li-Piin Sung, Auteur ; Xiaohong Gu, Auteur ; Joan Jasmin, Auteur ; Jonathan W. Martin, Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
p. 173-184 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Durée de vie (Ingénierie)
Epaisseur -- Mesure
Epoxydes
Microscopie à force atomique
Photodétérioration
Réflexion totale atténuée
Revêtements -- Effets du rayonnement ultraviolet
Thermodurcissables
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The relationship between chemical degradation and thickness loss of an unpigmented, nonUV-stabilized, crosslinked amine-cured epoxy coating exposed to three UV conditions was investigated. Spin-coated samples having a thickness of approximately 7 µm on an Si substrate were prepared from a stochiometric mixture of a bisphenol A epoxy resin and a tetra-functional amine curing agent. Samples were exposed outdoors and to two accelerated laboratory UV environments. Chemical degradation and thickness loss were measured by transmission Fourier transform infrared spectroscopy (FTIRS) and laser scanning confocal microscopy (LSCM), respectively. In addition, surface roughness and morphological changes were measured by atomic force microscopy (AFM) and LSCM. Substantial chemical degradation, thickness loss, and morpholocal changes occurred in the exposed films, and the rate of chemical degradation was greater than that due to the thickness loss. This additional chemical loss was attributed to an inhomogeneous degradation process in which nanoscale localized depressions initiate at certain sites on the surface, which then enlarge and deepen with exposure time. The results of this study provide a better understanding of the degradation mechanism and should lead to the development of scientific-based models for predicting the service life of crosslinked amine-cured epoxy coatings. |
| DOI : |
10.1007/BF02774507 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2FBF02774507.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3690 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 3 (07/2006) . - p. 173-184
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Relationship between chemical degradation and thickness loss of an amine-cured epoxy coating exposed to different UV environments in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 3 (07/2006)
