Étude et mise au point d'un procédé d'élaboration de mélanges à base de polyamides combinant un pilote de polycondensation et des mélangeurs statiques

Abstract : The aim of this work is to develop a process, which enables to blend polyamide in molten state with others polymers, directly at the outlet of a polycondensation reactor. Contrary to currently industrial processes, no remelting stage is needed in this one. The study has been carried out with polyamide 66 / polyethylene glycol blends (products with very different viscosities) and with polyamide 66 / ethylene propylene blends (products with similar viscosities), with or without polypropylene-graft-maleic-anhydride as interfacial agent. The first part of this work deals with the characterization of the dispersions obtained for these blends when their elaborations are carried out using conventional processes. Only few studies are available on blends, which exhibit a large difference between components viscosity. This work led us to develop a model to correlate, in this case, the dispersed phase size to the main operating conditions of each processes.The second part is dedicated to the design and the realization of an experimental installation, which is composed of polycondensation plant equipped, at the outlet of reactors, with a blending device based on static mixers technology. Its operation has been tested and experiments have been carried out in order to study the influence of the different processing parameters on blends morphology. The comparison of the results with those previously obtained using conventional processes allowed then to precise the performances and the limits of the process developed in this study
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Jonathan Leblanc. Étude et mise au point d'un procédé d'élaboration de mélanges à base de polyamides combinant un pilote de polycondensation et des mélangeurs statiques. Autre. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL046N⟩. ⟨tel-01754558⟩

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