| Titre : |
Effect of particle size distribution on stress development and microstructure of particulate coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Yan Wu, Auteur ; Lorraine F. Francis, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 455–465 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Carbonate de calcium broyé
Copolymère styrène acrylate
Dispersions et suspensions
Granulométrie
Latex
Liants
Microstructures -- Analyse
Particules (matières)
Revêtement -- Séchage
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The role of pigment particle size distribution on stress and microstructure development was studied for coatings prepared from aqueous suspensions of ground calcium carbonate (GCC) and latex binder. Stress development was monitored using a modified beam deflection technique under controlled environment. Microstructure was characterized by scanning electron microscopy (SEM) and cryogenic SEM. For coatings containing only GCC particles and no latex, a wide particle size distribution resulted in a significant particle size gradient in the cross-sectional microstructure and irregular stress development. With latex addition, uniform microstructures were observed in coatings with either wide or narrow GCC particle size distribution. GCC/latex coatings prepared using GCC with a wide particle size distribution developed a higher stress than those prepared using GCC with a similar average particle size but a narrow particle size distribution. The higher stress is related to the particle packing that results in smaller pore sizes and larger capillary pressures that drive compaction. In coatings prepared with the same GCC particles but different latex binders, the stress and cracking behavior of the coating depends on the latex properties. |
| Note de contenu : |
- MATERIALS AND METHODS : Suspension systems - Drying stress measurement - Microstructure characterization
- RESULTS AND DISCUSSION : Coatings prepared from GCC suspensions - Coatings prepared with GGC and styrene acrylate latex - Coatings prepared with GCC-W and different types of latex |
| DOI : |
10.1007/s11998-016-9866-5 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9866-5.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28160 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 2 (03/2017) . - p. 455–465
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Effect of particle size distribution on stress development and microstructure of particulate coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
