| Titre : |
Tubing extrusion of a fluoropolymer melt |
| Type de document : |
texte imprimé |
| Auteurs : |
Evan Mitsoulis, Auteur ; Savvas G. Hatzikiriakos, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 259-269 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Fluides, Mécanique des
Fluoropolymères
Matières plastiques -- Extrusion:Polymères -- Extrusion
Rhéologie
Simulation par ordinateur
Tubes
Viscoélasticité
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
The tubing extrusion-forming process of a fluoropolymer (FEP) melt was studied both experimentally and numerically. The flow behaviour of a FEP resin was determined by using a tubular die used in industrial-scale operations and these data were compared with simulation results using (i) a viscous model (Cross) and (ii) a viscoelastic one (the Kaye – Bernstein, Kearsley, Zapas / Papanastasiou, Scriven, Macosko or K-BKZ/PSM model) in order to assess the viscoelastic effects. In all simulations, compressibility, thermal and pressure effects on viscosity were taken into account. It was found that the viscoelastic results for the pressure, and hence the stresses at the wall, were always higher than the viscous results. Both were higher than the experimental results. A quadratic slip model plus viscoelasticity was found necessary to reproduce the experiments. The smooth flow curves resulting from this industrial tubular-coating die are a further manifestation that this is an appropriate design for coating fluoropolymers at very high apparent shear rates, exceeding 5 000 s–1. |
| Note de contenu : |
- Governing equations and rheological modelling
- Method of solution
- Experimental results
- Numerical results : No slip at the wall - Slip at the wall |
| DOI : |
10.3139/217.2534 |
| En ligne : |
https://drive.google.com/file/d/1m9ZIvDE92vkx1fkOdHXNvPJsMNAfISyU/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14696 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 2 (05/2012) . - p. 259-269
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Tubing extrusion of a fluoropolymer melt in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 2 (05/2012)
