[article]
| Titre : |
Chemical depth profiling of automotive coating systems using slab microtome sectioning with IR/UV-VIS spectroscopy and optical microscopy |
| Type de document : |
texte imprimé |
| Auteurs : |
Karlis Adamsons, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 47-54 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Essai vieillissement Dégradation photochimique Revêtement multicouche Etude expérimentale Microscopie optique Spectrométrie UV visible IR Microtomie Profil profondeur Feuil Analyse chimique Vernis Peinture Matériau revêtement Industrie automobile |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Chemical surface/near-surface analysis and depth profiling of high performance automotive coating systems can be done efficiently by commonly available infrared (IR), ultraviolet-visible (UV-VIS) and optical microscopy (OM) measurement technologies. The different stages of mass loss for acrylic/melamine-crosslinked clearcoats modeled after those used in high performance automotive coating systems were explored as a function of exposure time/conditions. Two approaches were used. Transmission mode IR experiments were conducted to monitor mass loss in isolated clearcoats. OM was used to monitor mass loss in clearcoats that are part of actual multilayered coating systems. UV-screener (UVA) permanence and interphase mixing (i.e., between clearcoat and basecoat layers) as well as general chemistry depth profiling studies of model acrylic/melamine-crosslinked and acrylic/melamine+silane-crosslinked clearcoats were done as a function of system preparation and exposure time/conditions. UVA depth profiles were obtained using slab microtomy sectioning co-planar to the surface, followed by solvent extraction and UV-VIS solution analysis to monitor UVA content as a function of section mass and thickness. General chemistry depth profiles were obtained using slab microtomy sectioning (as mentioned previously), followed by ATR (IR) analysis to monitor changes in the photooxidation index balues and the spectral envelop in the 2600-3800 cm-1 range. The approaches described herein de not require expertise/equipment that is available to only a few, thus increasing the potential utility of such tools. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5680 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 924 (01/2002) . - p. 47-54
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Chemical depth profiling of automotive coating systems using slab microtome sectioning with IR/UV-VIS spectroscopy and optical microscopy in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 924 (01/2002)
