| Titre : |
The influence of moisture content on the polymer structure of polyvinyl alcohol in dispersion barrier coatings and its effect on the mass transport of oxygen |
| Type de document : |
texte imprimé |
| Auteurs : |
Åsa Nyflött, Auteur ; Çağlar Meriçer, Auteur ; Matteo Minelli, Auteur ; Ellen Moons, Auteur ; Lars Järnström, Auteur ; Magnus Lestelius, Auteur ; Marco Giacinti Baschetti, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 1345-1355 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Alcool polyvinylique
Kaolin
Matériaux -- Propriétés barrières
Perméabilité
Polymères -- Effets de l'humidité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This paper presents a study of the effect of moisture on the gas permeability of polyvinyl alcohol (PVOH) and PVOH–kaolin dispersion barrier coatings. The oxygen permeability was measured at different humidity levels, and the material properties were characterized under the same conditions: polymer crystallinity, kaolin concentration, and kaolin orientation were all evaluated. The experimental results revealed that the water plasticizes the PVOH material of the coatings, and the presence of kaolin filler is unable to affect such behavior significantly. The PVOH crystallinity was affected drastically by the humidity, as water melts polymer crystallites, which is a reversible process under removal of water. The permeability data were analyzed using a thermodynamic-based model able to account for the water effect on both the solubility of the gas and the diffusivity coefficients in the polymer and composite. The results showed good agreement between the model’s predictions and the experimental data in terms of the overall permeability of the material. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Preparation of PVOH, kaolin dispersions and coatings - Permeability methods - Characterization of the material
- RESULTS AND DISCUSSION : Characterization of the material - Permeability - Modeling permeability |
| DOI : |
10.1007/s11998-017-9937-2 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9937-2.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29639 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1345-1355
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