[article]
| Titre : |
An investigation of the effect of pigment on the degradation of a naturally weathered polyester coating |
| Type de document : |
texte imprimé |
| Auteurs : |
W. R. Zhang, Auteur ; S. J. Hinder, Auteur ; R. Smith, Auteur ; C. Lowe, Auteur ; J. F. Watts, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 329-342 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Coil coatings
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Pigments organiques
Polyesters
Revêtements
Revêtements -- Détérioration
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A series of coil coatings based on a polyester/melamine resin formulation, incorporating different pigment systems, were naturally weathered after being exposed to the elements in Hainan, PRC, for 2 years. The surface chemistry and morphology, before and after weathering, was investigated using both traditional (i.e., gloss retention, color change) and novel (i.e., X-ray photoelectron spectroscopy [XPS], atomic force microscopy [AFM], and scanning electron microscopy [SEM]) methods. Chemical changes occurring in the coating bulk were investigated using step-scan photoacoustic Fourier transform infrared spectroscopy (SSPA-FTIR). It was found that the coating surface morphology, surface chemistry, and bulk chemistry, both before and after weathering, were all affected by the type and concentration of the pigments included in the coating formulation. Moreover, it was found that different types of pigment catalyze different coating degradation mechanisms. |
| Note de contenu : |
- EXPERIMENTAL : Materials and sample preparation - Weathering of coil coatings - X-ray photoelectron spectroscopy - Photoacoustic (PA) FTIR - Atomic force microscopy - Scanning electron microscopy - Gloss retention and color measurements
- RESULTS AND DISCUSSION : Surface chemistry characterization - Bulk chemistry characterization. |
| DOI : |
10.1007/s11998-010-9305-y |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9305-y.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11673 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 3 (05/2011) . - p. 329-342
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