| Titre : |
Waterborne etherified MF and PVAc hybrid resin containing nanoclay as intumescent flame-retardant plywood coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Chih-Shen Chuang, Auteur ; Kuang-Chong Wu, Auteur ; Horn-Jiunn Sheen, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 843-856 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Argile
Copolymère mélamine-formaldéhyde
Ethérification
Fourier, Spectroscopie infrarouge à transformée de
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
Matériaux hybrides
Nanoparticules
Polyacétate de vinyle
Résonance magnétique nucléaire
Revêtements en phase aqueuse
Revêtements organiques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The flame retardancy of waterborne intumescent coatings for plywood has been investigated. Different concentrations (1%, 3%, 5%, and 10%) of organoclay (Cloisite 15A) were added to a hybrid (etherified melamine formaldehyde and polyvinyl acetate) resin to generate coatings. The CO and CO2 emissions from the coatings during combustion were determined. An intumescent coating containing organoclay exhibited superior flame-retardant properties than does the pure hybrid resin. By comparing the performance of intumescent coatings prepared using organoclay and unmodified clay, it has been demonstrated that coatings contain the modified clay that have better flame-retardant properties. The presence of organoclay in the coating promotes the formation of an ideal char layer during combustion when the concentration is 3%. Intumescent coatings containing organoclay undergo combustion with lower CO emissions, but greater CO2 emission. 13C, 27Al, and 31P solid-state nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy were used to determine the chemical structure of the char layers to determine the mechanism underlying char formed upon combustion and delineate the process of char degradation. Based on the observed flammability and CO/CO2 emission, intumescent coatings containing 3% or 5% organoclay display a greater reduction in flammability than do coatings containing higher concentrations of the organoclay. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Sample preparations - Cone calorimeter tests - Thermal properties of the intumescent coatings - FTIR spectroscopy - 13C, 27Al, and 31P solid-state NMR spectroscopy
- RESULTS AND DISCUSSION : Testing the flame retardancy of modified and unmodified clay - Thermal properties of intumescent coatings - Gas emissions of intumescent coatings - FTIR analysis
- Table 1 : Different formulations of intumescent coatings in a solid weight ratio (w/w)
- Table 2 : Weight loss and temperature degradation of different amounts of organoclay by thermogravimetric analysis |
| DOI : |
https://doi.org/10.1007/s11998-022-00607-5 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00607-5.pdf?pdf=button% [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39432 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 843-856
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Waterborne etherified MF and PVAc hybrid resin containing nanoclay as intumescent flame-retardant plywood coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
