Waterborne etherified MF and PVAc hybrid resin containing nanoclay as intumescent flame-retardant plywood coatings / Chih-Shen Chuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 843-856 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 Ignifugeants Composé 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 [article]

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