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Bulk polymerization of ε-caprolactone in twin screw extruder / J. Gimenez in INTERNATIONAL POLYMER PROCESSING, Vol. XV, N° 1 (03/2000)
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Titre : Bulk polymerization of ε-caprolactone in twin screw extruder : A step toward the process control Type de document : texte imprimé Auteurs : J. Gimenez, Auteur ; M. Boudris, Auteur ; Philippe Cassagnau, Auteur ; A. Michel, Auteur Année de publication : 2000 Article en page(s) : p. 20-27 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : The ε-caprolactone bulk polymerisation, initiated by tetrapropoxy titanium, was investigated in a co-rotating twin screw extruder. On the basis of pressure measurements, the process dynamic modelling was achieved. The pressure drop at the exit die of the extruder was correlated to the rheological behaviour of the melt polycaprolactone owing to equations which characterise the flow inside the die. The residence time distribution modelling was determined with an in-line Ultra-Violet fluorescence method. Thus, the combination of both modellings leads to the process dynamic modelling. This work constitutes the basis for an approach of the process regulation by the way of an internal model control. Simulation has given good results. However, the large response time to the control, relative to the process dynamic, constitutes effectiveness limiting factor for experimental control of the process. Note de contenu : - CHEMICAL AND RHEOLOGICAL ASPECT OF THE POLYMERISATION : Chemical aspect mechanism - Rheological modelling - Principle of the slit rheometer - Extrusion experiments - Modelling of the pressure at steady regime - Modelling of the process dynamic - A step toward the process control DOI : 10.3139/217.1570 En ligne : https://drive.google.com/file/d/1pXWwG8pK9Buq9npNlWRCOQ3CuHnrZ5un/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16070
in INTERNATIONAL POLYMER PROCESSING > Vol. XV, N° 1 (03/2000) . - p. 20-27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001011 - Périodique Bibliothèque principale Documentaires Disponible Polymerization of ε-caprolactone in a twin screw extruder / Arnaud Poulesquen in INTERNATIONAL POLYMER PROCESSING, Vol. XVI, N° 1 (03/2001)
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Titre : Polymerization of ε-caprolactone in a twin screw extruder : Experimental study and modelling Type de document : texte imprimé Auteurs : Arnaud Poulesquen, Auteur ; Bruno Vergnes, Auteur ; Philippe Cassagnau, Auteur ; J. Gimenez, Auteur ; A. Michel, Auteur Année de publication : 2001 Article en page(s) : p. 31-38 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : The purpose of this work is to model the bulk polymerization of ε-caprolactone in a corotating twin screw extruder. Starting from kinetic data and rheological laws previously defined, we use a twin screw flow modelling software to calculate the progress of the polymerization along the extruder. Experiments are performed to assess the influence of processing conditions (feed rate, screw speed, barrel temperature, initiator concentration) and to validate the model. They put in evidence the control of the polymerization process by temperature and the residence time in the extruder. It is shown that a good correlation between theoretical and experimental results can only be obtained if accurate kinetic and rheological data are used in the m DOI : 10.3139/217.1626 En ligne : https://drive.google.com/file/d/14-m_LXLBV04m_d0S3m64_1o_JG1tMrRY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15882
in INTERNATIONAL POLYMER PROCESSING > Vol. XVI, N° 1 (03/2001) . - p. 31-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001015 - Périodique Bibliothèque principale Documentaires Disponible