| Titre : |
Spray applications. Part III. Assessment of viscosities at high shear rates and dynamic uniaxial extensional viscosities on fan nozzle air sprayability |
| Type de document : |
texte imprimé |
| Auteurs : |
Peter T. Elliott, Auteur ; Mark J. Steffenhagen, Auteur ; J. Edward Glass, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 341-349 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Alliages polymères
Buse (tuyère)
hydroxyéthylcellulose
Polyéthylène glycol
Polymères hydrosolubles
Pulvérisation
Revêtements en phase aqueuse:Peinture en phase aqueuse
Rhéologie
Tension superficielle
Viscosité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The relationship between rheological parameters and the atomization and sprayability of a fluid can be quantified through examination of blends of structurally different water-soluble polymers (W-SPs). This was done previously for roll coatings by blending two high-molecular weight W-SPs: one with segmental rigidity, hydroxyethyl cellulose (HEC), that has a greater impact with increasing concentration on shear viscosities than on extensional viscosities and one with segmental flexibility, poly(oxyethylene) (POE), that exhibits a counter effect. Within these blends the molecular weight of the HEC is varied to increase the viscosities at high shear rates. By blending these two types of W-SPs, two sets of HEC and POE blends (high Mv HEC/high Mv POE and low Mv HEC/ high Mv POE) were prepared exhibiting the same low shear rate viscosity but different viscosities at high shear rates (HSVs). Within each blend set, three ratios of HEC:POE were formulated to have essentially identical shear viscosity profiles, surface tensions, and storage (elastic) moduli (G'), but differences in dynamic uniaxial extensional viscosity (DUEV). This allowed the role of HSVs and DUEVs to be separated in their influence on atomization and sprayability. Within a set, variations in the HEC:POE ratio highlight the dominance of DUEVs as the controlling parameter in the sprayability of a formulation. |
| DOI : |
10.1007/s11998-007-9050-z |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9050-z.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3624 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 4 (12/2007) . - p. 341-349
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Spray applications. Part III. Assessment of viscosities at high shear rates and dynamic uniaxial extensional viscosities on fan nozzle air sprayability in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
