Etude de la miscibilité des polymères par la méthode de coalescence des grains en vue du recyclage des DEEE par rotomoulage

Abstract : The aim of this thesis is to study the miscibility of polymer blends with a view to recycling WEEE polymers by rotomoulding. Indeed, miscibility is a key factor which determines the final properties of polymer blends. The work was divided into two parts. Based on the characterization results of Éco-systèmes WEEE, the choice of materials (PVDF / PMMA) and (ABS / PC) was motivated by the industrial and scientific interest of these two couples. The first part of the work presents an array of experimental methods, ranging from processing to material characterization, with the aim of exploring the miscibility of these mixtures. In particular, the study of the coalescence of the grains made it possible to demonstrate the miscibility of the PVDF / PMMA couple and the partial miscibility of the ABS / PC (coating phenomenon). At the end of this study, the PVDF / PMMA couple was retained as a "model" pair to perform a generalized predictive model of the coalescence between different polymer grains. This model was coupled with a probabilistic parametric analysis to evaluate the effect of the uncertainties of the viscosity, surface tension, relaxation time and grain size measurements on coalescence kinetics. The work ends with a draft of the simulation of the coalescence phenomenon and the coating in the case of miscible and partially miscible polymers respectively
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Sara Aid. Etude de la miscibilité des polymères par la méthode de coalescence des grains en vue du recyclage des DEEE par rotomoulage. Mécanique des matériaux [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2017. Français. ⟨NNT : 2017ENAM0059⟩. ⟨tel-01769980⟩

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