| Titre : |
Fluorochemical intermediates, surfactants and their use in coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Johan de Witte, Auteur ; Guido Piessens, Auteur ; Rudy Dams, Auteur |
| Année de publication : |
1995 |
| Article en page(s) : |
p. 58-64 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chimie des surfaces
Composés fluorés
Revêtements -- Additifs
Surfactants
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Although fluorine was discovered over 100 years ago, and inorganic fluorides are quite abundant in the earth's crust, it took until the Second World War before organofluorine materials ant their unique properties were well established in the industrial world. Fluorine is the most electronegative element known. Its Van der Waals' radius is only slightly larger than that of hydrogen, but is significantly smaller than that of the bulky chlorine or bormine atoms
As shown in table 1, the C-F bond strength is much higher than that of the C-Cl or C-Br bonds. The C-F bond is a short, very strong and stable bond with a very low and stable bond with a very low polarizability. Organochlorine or bromine compounds ar much more susceptible to degradation reactions and can set free chlorine or bromine radicals. One of the consequences there of is the ozone depletion in the earth's atmosphere. Fluorocarbons do not exhibit this behaviour and are extremely stable even under very demanding conditions. |
| Note de contenu : |
- FLUOROCHEMICAL INTERMEDIATES
- FLUOROCHEMICAL INTERMEDIATES IN COATINGS : Just a few applications
- FLUOROCHEMICAL SURFACTANTS
- FLUROCHEMICAL SURFACTANTS IN COATINGS : Surfactants in coatings : Surface tension - Crater formation - Wetting phenomena |
| Permalink : |
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in SURFACE COATINGS INTERNATIONAL > Vol. 78, N° 2 (02/1995) . - p. 58-64
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