Plastics compounding and polymer processing / Klemens Kohlgrüber / Munchen [Germany] : Hanser (2022)

Titre : Plastics compounding and polymer processing : Fundamentals, machines, equipment, application technology Type de document : texte imprimé Auteurs : Klemens Kohlgrüber, Auteur ; Michael Bierdel, Auteur ; Harald Rust, Auteur Editeur : Munchen [Germany] : Hanser Année de publication : 2022 Importance : XXXI-846 p. Présentation : ill. Format : 25 cm ISBN/ISSN/EAN : 978-1-56990-837-2 Prix : 267 E Note générale : Index - Bibliogr. Langues : Américain (ame) Catégories : Compoundage Extrudeuses Filtres Granulation Matières plastiques Matières plastiques -- Appareils et matériel Matières plastiques -- Extrusion Mesure Polymères Pompes à engrenages Production Séchage Index. décimale : 668.4 Plastiques, vinyles Résumé : Plastics production comprises the main process steps "synthesis (reaction)", "preparation/compounding" at the raw material manufacturer and compounder, and "processing" (shaping into semi-finished or finished products). In this handbook, the central middle step, preparation and compounding, is discussed. The preparation tasks include the removal of components, the incorporation of additives, and the change of particle size. Compounding is the incorporation of additives into a polymer or plastic. The process engineering fundamentals and the specific equipment and machines used are described. The specialist authors impart their knowledge from the fields of research, polymer production, and equipment/machine production with applications in plastics technology. Note de contenu : - A. INTRODUCTION TO THE PROCESSING OF POLYMERS : 1. Introduction - 2. Polymer processing - Process technology of polymer production - B. PROCESSING IN POLYMER PRODUCTION : 3. Devolatilizing devices - C. PROCESSING AFTER POLYMER PRODUCTION - COMPOUNDING : 4. Requirements, product development, additives, sources of faults - 5. Compounding with co-rotating twin-screw extruders - 6. Compounding and polymer processing with different extruder types - 7. Processing of polymer melts other devices and machines - D. FURTHER IMPORTANT COMPONENTS OF A PROCESSING FACILITY : 8. Bulk material technology in polymer processing - 9. Gear pumps for compounding - 10. Filters for (highly) viscous polymer melts - 11. Pelletizing and drying - 12. Measurement technology Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37564

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The extrusion of EPDM using an external gear pump : experiments and simulations / Vincent G. de Bie in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 4 (2022)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 4 (2022) . - p. 452-468 Titre : The extrusion of EPDM using an external gear pump : experiments and simulations Type de document : texte imprimé Auteurs : Vincent G. de Bie, Auteur ; Michelle M .A. Spanjaard, Auteur ; Martien A. Hulsen, Auteur ; Patrick D. Anderson, Auteur Année de publication : 2022 Article en page(s) : p. 452-468 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc Caractérisation Eléments finis, Méthode des Ethylène-propylène-diène monomère Matières plastiques -- Extrusion Pompes à engrenages Index. décimale : 668.4 Plastiques, vinyles Résumé : External gear pumps are used in fluid transport systems because of their tight clearances and accurate flow control. These tight clearances are a challenge for numerical studies in terms of spatial discretization. In earlier work, the flow of a viscous fluid in an external gear pump is computed using the finite element method (FEM). An element size based on the respective distance between boundaries is proposed. In this study, results based on the earlier work are compared to extrusion experiments of EPDM. The aim of this study is not only to validate the numerical simulations, but also to determine what material characteristics need to be taken into account for an accurate output prediction of the external gear pump. Especially the introduction of shear-thinning behavior results in an improvement of the amplitude of the pressure difference fluctuation. Taking into account compressibility, alters the torque fluctuation in such a way that it mimics the experiments. Unfortunately, the fluctuation in torque still has a too high amplitude. Eventually, simulations are performed including shear-thinning behavior, a temperature- and pressure-dependent viscosity, and compressibility. The effect of measuring the material behavior using oscillatory or shear experiments is shown. Furthermore, the simulations are applied to a second EPDM. Finally, different processing conditions are tested. For the simulations, only qualitative agreement is found, possibly as a result of the no slip boundary condition. Note de contenu : - PROBLEM DEFINITION AND GOVERNING EQUATIONS : Governing equations - Initial and boundary conditions - Weak form - Discretization - EXPERIMENTS : Materials - Characterization - Extrusion system - RESULTS : Characterization - Extrusion - Material behavior - Table 1 : The measurements performed using the extrusion system - Table 2 : The parameters for the Carreau-Yasuda model and the WLF equation DOI : https://doi.org/10.1515/ipp-2022-4240 En ligne : https://drive.google.com/file/d/1breXzICPmTeqWMnreAMbSM7O6cJuD5fa/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37920 [article]

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