| Titre : |
Flow behavior of a polypropylene melt in capillary dies read more |
| Type de document : |
texte imprimé |
| Auteurs : |
L.-S. Pan, Auteur ; H.-J. Luger, Auteur ; Jürgen Miethlinger, Auteur ; W. Friesenbichler, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 642-651 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Etat fondu (matériaux)
Modèles mathématiques
Polypropylène
Rhéologie
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Using capillary dies having different diameters, D, and length-to-diameter L/D ratios, a full rheological characterization has been carried out for a polypropylene melt, and the experimental data have been fitted both with a viscous model (Cross) and a viscoelastic one (the Kaye – Bernstein, Kearsley, Zapas/Papanastasiou, Scriven, Macosko or K-BKZ/PSM model). Particular emphasis has been given on the pressure-dependence of viscosity. It was found that only the viscoelastic simulations were capable of reproducing the experimental data well, while any viscous modeling always underestimates the pressures, especially at the higher apparent shear rates and L/D ratios. |
| Note de contenu : |
- EXPERIMENTAL : Materials and rheological methods
- MATHEMATICAL MODELING : Governing equations - Non-isothermal modeling - pressure dependent modeling
- METHOD OF SOLUTION
- RESULTS AND DISCUSSION : Rheological characterization - Capillary dies simulations |
| DOI : |
10.3139/217.3581 |
| En ligne : |
https://www.degruyter.com/document/doi/10.3139/217.3581/pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31403 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 5 (11/2018) . - p. 642-651
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