| Titre : |
Extrusion defects and flow instabilities of molten polymers |
| Type de document : |
texte imprimé |
| Auteurs : |
Bruno Vergnes, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 3-28 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Etat fondu (matériaux)
Extrusion -- Défauts
Matières plastiques -- Extrusion:Polymères -- Extrusion
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
When certain critical conditions are exceeded, the flow of a polymer melt becomes unstable, giving rise to particular phenomena that are the subject of this review. These instabilities are a vital industrial problem, as they are the key to productivity of extrusion processes. Indeed, their onset leads to unacceptable products and is thus the upper limit of the processing conditions. They are also a fascinating scientific problem because, although studied and discussed for more than half a century, they are still not fully understood and their mechanisms are still sometimes controversial. In the present literature review, we present an overview of the studies carried out for fifty years, as well as our own opinion on the underlying mechanisms. |
| Note de contenu : |
- GENERAL OVERVIEW OF EXTRUSION DEFECTS : The various defects - Polymer families and associated defects
- THE SHARKSKIN DEFECT : Description of the observed phenomena - Influence of parameters - Mechanisms and interpretations - Remedies and solutions
- THE "OSCILLATING DEFECT" (OR "STICK-SLIP" DEFECT) : Description of the observed phenomena - Influence of parameters - Mechanisms and interpretations - The descriptive models - Remedies and solutions
- VOLUME DEFECTS : Description of the observed phenomena - Mechanisms and intrepretations - Remedies and solutions
- CONCLUSION - THE REMAINING CHALLENGES |
| DOI : |
10.3139/217.3011 |
| En ligne : |
https://drive.google.com/file/d/1WVuKoc_Y_dtntjTSFPMzZdoexlIWVAhA/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23414 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 1 (03/2015) . - p. 3-28
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Extrusion defects and flow instabilities of molten polymers in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 1 (03/2015)
