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Relating gloss loss to topographical features of a PVDF coating / Jenny Faucheu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)
[article]
Titre : Relating gloss loss to topographical features of a PVDF coating Type de document : texte imprimé Auteurs : Jenny Faucheu, Auteur ; Kurt A. Wood, Auteur ; Li-Piin Sung, Auteur ; Jonathan W. Martin, Auteur Année de publication : 2006 Article en page(s) : p. 29-39 Note générale : bibliogr. Langues : Américain (ame) Tags : Amérique du Nord Etats Unis Propriété chimique surface esthétique Etude expérimentale Diffusion lumière Faisceau laser Microscopie confocale Méthode analyse Relation structure propriété Floride Vieillissement produit Résistance intempérie Durabilité Polymère fluor Dégradation photochimique Rugosité Topographie Matériau revêtement Vinylidène fluorure polymère Brillant Index. décimale : 667.9 Revêtements et enduits Résumé : Semi-gloss commercial poly(vinylidene fluoride) (PVDF) coatings typically have 60° gloss values between 20 and 50. Gloss is affected by PVDF crystallite structures and by the pigmentation. In this article, we have demonstrated that for some pigmented PVDF coatings, after 10 years of Florida exposure, the principal proximal cause of gloss changes is the formation of micron-scale pits, rather than the emergence of pigment particles at the coating surface. We have used laser scanning confocal microscopy (LSCM) and light scattering to characterize the surface topography and near-surface structure of weathered and unweathered PVDF coatings. Florida-weathered PVDF coatings show only a modest increase in the root mean square (RMS) roughness of the surface, even when noticeable gloss loss has occurred. Changes in gloss can be correlated with surface roughness and other topographical features, including the formation of pits and the emergence of pigments. DOI : 10.1007/s11998-006-0003-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0003-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3710
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 1 (01/2006) . - p. 29-39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003762 - Périodique Bibliothèque principale Documentaires Disponible Specular gloss scales comparison between the national institute of standards and technology and the national research council of Canada / Maria E. Nadal in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 943 (08/2003)
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Titre : Specular gloss scales comparison between the national institute of standards and technology and the national research council of Canada Type de document : texte imprimé Auteurs : Maria E. Nadal, Auteur ; Mario Nöel, Auteur ; Joanne C. Zwinkels, Auteur Année de publication : 2003 Article en page(s) : p. 45-51 Note générale : Bibliogr. Langues : Américain (ame) Tags : Amérique Nord Propriété optique Mesure comparative Etalonnage Canada Organisation nationale Organisme normalisation Equation état Brillant Index. décimale : 667.9 Revêtements et enduits Résumé : The gloss value of a test sample is determined relative to a standard, generally a polished piece of black glass. Therefore, gloss is a dimensionless quantity whose accurate determination requires standardized experimental conditions such as spectral distribution of the incident beam of light, incident and viewing angles, and a gloss standard. To help manufacturers monitor and assess specular gloss, the National Institute of Standards and Technology (NIST) Physics Laboratory provides a special test service to calibrate gloss reference standards. This facility is built around a newly rebuilt reference goniophotometer—an instrument that measures flux as a function of angles of illumination or observation—and a newly developed primary gloss standard—three wedges of highly polished, high-quality optical glass. The system has an overall (k = 2) uncertainty of 0.4%. The new service offers calibration measurements of industry working gloss standards at the specular geometries of 20°, 60°, and 85°, in compliance with the International Standards Organization (ISO) 2813 and the American Society for Testing and Materials (ASTM) D 523 documentary standards. This article describes a bilateral comparison of specular gloss scales between NIST and the National Research Council of Canada (NRCC) that has been performed. The results of this comparison show agreement within the combined uncertainties for the measurement of specular gloss of highly polished black glass. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5576
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 943 (08/2003) . - p. 45-51[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000568 - Périodique Bibliothèque principale Documentaires Disponible