Titre : |
Use of thermally stimulated current to measure properties of coatings |
Type de document : |
texte imprimé |
Auteurs : |
C. A. Kumins, Auteur ; C. J. Knauss, Auteur ; R. J. Ruch, Auteur |
Année de publication : |
1994 |
Article en page(s) : |
p. 79-84 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Adhésion Adsorption Carbonate de calciumLe carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Chlorure de polyvinyle Concentration pigmentaire volumique Copolymères Couches minces Polyacrylates Revêtements:Peinture Température
|
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
Both neat and calcium carbonate (CaCO3) filled films of an acrylate latex terpolymer with one percent free acid groups were cast on aluminum foil. Films of varying degrees of adhesion to aluminum were studied by measuring thermally stimulated current (TSC) as a function of temperature, film thickness, and degree of pigment loading. Films with the best adhesion gave the highest values of TSC over a large temperature range and also a large increase in TSC as the films delaminated. Duplicate measurements of TSC versus temperature for the same film gave good reproducibility. TSC curves of the neat polymer films gave a peak near the glass transition temperature (Tg) of the latex. The pigmented polymer films gave a peak about 5°C above the Tg of the latex.
The terminus of the interphase region for the neat polymer was in the range of 250-350 microns. Extrapolation to zero TSC for the filled system gave a pigment volume concentration (PVC) near 38%, which was postulated to be a measure of the critical pigment volume concentration (CPVC). |
Note de contenu : |
- RESULTS : Degree of adhesion - Noise - Reproducibility - Current peaks - Film thickness |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18681 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 835 (08/1994) . - p. 79-84