| Titre : |
Abnormal behaviors in the capillary rheometry of plastisol formulations |
| Type de document : |
texte imprimé |
| Auteurs : |
Y. Demay, Auteur ; Y. Abdesselam, Auteur ; Jean-François Agassant |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 363-370 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse numérique
Bagley, Correction de
Chlorure de polyvinyle
Ecoulement laminaire
Formulation (Génie chimique)
Modèles mathématiques
Revêtements de sols
Rhéologie
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The rheology of plastisol formulations for flooring applications using knife-over-roll coating process is studied using both Couette and capillary rheometers. The behavior is similar in many aspects to the rheology of suspensions: Shear thinning behavior at low shear rate, then a Newtonian plateau at intermediate shear rates followed by a dilatancy peak. However several abnormal phenomena may be observed in capillary experiments. At very high shear rates, a second shear thinning behavior is observed which depends on the flow geometry. Due to the non-monotonous behavior of the plastisol viscosity, this is analysed using a dedicated numerical method. An apparent slip velocity has been determined. Otherwise capillary experiments point out the existence of important entrance pressure loss. These measures are interpreted using a modified Cogswell method as an important elongationnal viscosity, around hundred times the shear viscosity. |
| Note de contenu : |
- CAPILLARY RHEOLOGY OF PLASTISOL FORMULATIONS : Rheology measurements protocol - Plastisol formulations - Bagley corrections - Influence of the capillary diameter - Numerical investigation of the flow curves - Poiseuille flow modelling for a non-monotonous viscous behaviour
- RESULTS : Analysis as an apparent slip velocity for the small capillary diameter - Analysis of entrance pressure drop |
| DOI : |
10.3139/217.3554 |
| En ligne : |
https://drive.google.com/file/d/1Rft14dDwixD5jh6JwdPzBYX6UY-uEsLz/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30805 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 3 (07/2018) . - p. 363-370
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