| Titre : |
Advances in fluoropolymer dispersions |
| Type de document : |
texte imprimé |
| Auteurs : |
T. Poggio, Auteur ; V. Kapeliouchko, Auteur ; V. Arcella, Auteur ; E. Marchese, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 51-56 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alliages polymères
Dispersions et suspensions
Emulsions
Microémulsions
Polymérisation en émulsion
Polytétrafluoréthylène
Résistance à l'abrasion
Revêtements organiques
Stabilisants (chimie)
Surfactants
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Multimodal high-performance fluoropolymer dispersions have been developed thanks to Solvay Solexis' proprietary technology which permits bimodal particle-size distributions to be obtained, not only by blending standard fluoropolymer dispersions (diameter 250nm) with nano-latexes (diameter from 10 to 60nm), but also directly from polymerisation, exploiting a competitive homogeneous/coagulative and droplet nucleation mechanism. It has been found that poly(tetra-fluoroethylene) (PTFE) bimodal dispersions have optimal film-forming and particle-packing behaviour at a size ratio of about 0.15, corresponding with the best fit to the random close-packing model, while no significant improvements are observed when the aforesaid size ratio is 0.3. |
| Note de contenu : |
- LATEX PREPARATION AND CHARACTERISATION : Emulsion polymerisation - Microemulsion polymerisation - Direct polymerisation of bimodal dispersions
- RESULTS AND DISCUSSION : Dispersions stabilised with phenol-free non-ionic surfactants - Coating characteristics - Further developments
- Table 1 : PTFE dispersion characteristics
- Table 2 : Nano-PTFE dispersion characteristics
- Table 3 : Composition ranges of PTFE/nano-PTFE blends
- Table 4 : PTFE bimodal dispersions obtained directly from polymerisation
- Table 5 : Film roughness measured by AFM analysis
- Table 6 : Coating anticorrosive characteristics. All blends contain 15% of nano-particles
- Table 7 : Low-APFO coating characteristics |
| DOI : |
10.1007/BF02699565 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/BF02699565.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5502 |
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B1 (02/2004) . - p. 51-56
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