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Mass transport mechanism for the formation of latex-modified epoxy coatings by evaporation from aqueous dispersions / Sidney L. Phillips in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 4 (10/2004)

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inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 1, N° 4 (10/2004) . - p. 315-327

Titre :	Mass transport mechanism for the formation of latex-modified epoxy coatings by evaporation from aqueous dispersions
Type de document :	texte imprimé
Auteurs :	Sidney L. Phillips, Auteur ; M. Troy Davis, Auteur ; Daniel J. Phillips, Auteur
Année de publication :	2004
Article en page(s) :	p. 315-327
Note générale :	Bibliogr.
Langues :	Américain (ame)
Tags :	Etude expérimentale comparative théorique Transfert chaleur masse Modèle cinétique Modélisation Mécanisme formation Cinétique Formation film Séchage Dispersion aqueuse Matériau revêtement Epoxyde résine
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The transport mechanism for the evaporation of dispersing liquid during the solidification of an epoxy dispersion that had been stabilized to prevent crack formation with a latex dispersion was studied. Aqueous dispersions consisting of an experimentally determined ratio of epoxy resin and nitrile latex were evaporated at 35°C. When the dispersion was evaporated under controlled conditions without forced air flow, a flexible and adherent polymer material formed. The mechanism for coalescence was related to the loss in weight of dispersing liquid during an initial zero order kinetics stage. This was followed by a rate-controlled Fick's law diffusion through the developing coating with subsequent evaporation to the atmosphere. Experimental measurements are compared with theoretical predictions. The rate constant for the zero order time frame is 0.086 ± 0.02 h-1. In the second time frame, Ficks's law evaporation rate constant is 0.046 ± 0.017 cm.h-1 with a diffusion coefficient of 0.00092 ± 0.00051 cm2.hr-1 at 35 ± 1 °C and RH 35 ± 7%. Applications for evaporation kinetics are discussed.
DOI :	10.1007/s11998-004-0033-z
En ligne :	https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0033-z.pdf
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3862

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