[article]
| Titre : |
The role of surfactant on the film formation of latex polymers |
| Type de document : |
texte imprimé |
| Auteurs : |
P. Nagarajan, Auteur ; C. K. Mital, Auteur ; M. K. Trivedi, Auteur |
| Année de publication : |
1996 |
| Article en page(s) : |
p. 19-24 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Tags : |
Latex 'Réseau polymère interpénétré' 'Méthacrylate méthyle polymère' 'Acrylate butyle 'Méthacrylique acide 'Système ternaire' 'Formation film' 'Agent surface' 'Propriété 'Tension superficielle' |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Two different latex interpenetrating polymer networks (LIPNs), comprising of polyacrylate (methyl methacrylate: n-butyl acrylate: methacrylic acid-43:57: 2.5) as seed and second polymer as polystyrene and polymethyl methacrylate, having a difference in hydrophilicity have been prepared. Surface tension measurements, were carried out to demonstrate the difference in adsorption equilibria of the anionic surfactant, sodium dodecyl sulphate on the different latex particles, with change in pH. the films were cast at different pHs, and it was found that the film of styrene based LIPN at a low pH (3.3), yielded translucent film while transparent films were also obtained from styrene based LIPN at a higher pH of 9, neutralized with NaOH. The higher strength of the latex films, obtained at the pH of 9 than those obtained at pH 3.3 of the styrene based LIPNs, indicates that the reduction in the polymer-water interfacial tension enhances the coalescence. It has been demonstrated clearly by the experimental evidence, that adsorption of surfactant on polymer, in styrene based latexes and the exudation of the surfactant in MMA based latexes, results in major difference in the optical clarity of the latex films. |
| Note de contenu : |
- Preparation of LIPNs
- Surface tension measurements
- Transparency of the films
- Tensile strength
- Spectral measurements |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13390 |
in PAINTINDIA > Vol. XLVI, N° 2 (02/1996) . - p. 19-24
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