[article]
| Titre : |
Compositional effects on the fouling resistance of fluoroethane coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
S. J. Bonafede, Auteur ; Robert F. Brady, Auteur |
| Année de publication : |
1998 |
| Article en page(s) : |
p. 181-185 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The attraction of fluorinated urethanes is their low surface energy. Because the strength of adhesion to a surface decreases as the surface energy decreases in the range 30-70mJ m-2, it was believed that surfaces with free energies less than 20 mJ m-2 would resist adhesion. However, other workers have shown that the adhesion of marine organisms is at a minimum in a distinct range near 23-25 mJ m-2, and increases gradually as the surface energy falls below that range. Persevely, organisms differ in their preferences ; barnacles prefer surface free energies ranging from 30-35 mJ m-2, but bryozoans adhere best to surfaces having energies between 10-30 mJ m-2. Fluorinated urethanes are also attractive because of their longlife in the marine environment. They are amorphous, highly-crosslinked materials with excellent resistance to degradation by heat, water, or sunlight
This paper reports an evaluation of the correlation between composition, properties, and fouling-release behaviour of fluorinated thermoset polymers, and particularly on the properties of the polymers that make them attractive candidates for marine coatings. These include mechanical strength, measured by modulus, indentation hardness and glass transition temperature ; surface composition, measured by contact angle studies ; and chemical stability, measured by fluorine content and crosslinking density. |
| Note de contenu : |
- EXPERIMENTAL : Sample preparation - Fouling studies - Contact angle measurements and surface energy calculations - Thermal analysis - Mechanical properties
- RESULTS AND DISCUSSION : Immersion studies - Contact angle measurements and surface energy - Thermal data - Mechanical properties
- APPENDIX : Calculation of surface energies - Calculations of modulus and plastic hardness |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16558 |
in SURFACE COATINGS INTERNATIONAL > Vol. 81, N° 4 (04/1998) . - p. 181-185
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Compositional effects on the fouling resistance of fluoroethane coatings in SURFACE COATINGS INTERNATIONAL, Vol. 81, N° 4 (04/1998)
