Reactive extrusion of TPU / Aleksandra Buczko in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 8 (2020)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 8 (2020) . - p. 43-45 Titre : Reactive extrusion of TPU : Production of thermoplastic polyurethanes with reduced carbon footprint Type de document : texte imprimé Auteurs : Aleksandra Buczko, Auteur ; Andrei Holzer, Auteur ; Simon Kemmerling, Auteur Année de publication : 2020 Article en page(s) : p. 43-45 Langues : Anglais (eng) Catégories : Extrusion réactive Formaldéhyde Formulation (Génie chimique) Matières plastiques -- Extrusion Polymères -- Synthèse Polyols Polyuréthanes Thermoplastiques -- Extrusion Index. décimale : 668.4 Plastiques, vinyles Résumé : The simple replacement of petroleum-based components with renewable alternatives in a well-established reactive extrusion process is a promising route to more environmentally friendly thermoplastic polyurethane elastomers (TPU). However, this requires a comprehensive understanding of the interactions between chemical reactions and material flow within an extruder, as well as a thorough understanding of the effects of heat and shear on polymerization and melt processing. Note de contenu : - Advantages of reactive extrusion - Novel polyol in classic TPU - From the REX concept to the pilot process - Use of sustainable polyols in the established REX process - Figure : Extruded strand from the continuous synthesis of a thermoplastic polyurethand, containing the new paraformaldehyde-based polyol - Fig. 1 : Thermoplastic polyurethand synthesized using the newly developed polyol based on paraformaldehyde core. The solvent cast foil has excellent transparency - Fig. 2 : Development steps within "Dream Polyols" : from the preliminary determination of the polyurethane formulation and the REX conditions to the implementation of newly developed components in the established processing approach - Fig. 3 : Determining the physical and chemical causes of the instabilities in reactive extrusion allows the dosing strategy and the processing wxindow to be adjusted, resulting in a well-controlled process - Fig. 4 : Molecular weight and dispersity of thermoplastic polyurethane produced by the REX process. The polymer performance is controlled by a simple adjustment of the material formulation En ligne : https://drive.google.com/file/d/1hqkeI-eieybWTmsT6QqYGCLpRAbvpo94/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34637 [article]

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