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Polymérisation in-situ en milieu fondu et sous écoulement élongationnel pour l'élaboration de nouveaux matériaux

Abstract : In this work, binary and ternary reactive blends based on immiscible thermoplastic polymers PMMA,PE and PS were realized. The in-situ polymerization of the styrene, precursor of PS, was led by thermal self-polymerization or still thanks to radical initiator. Blends were realized in a mixer named RMX who generates mainly extensional flows known for their distributive and dispersive skill even if components have an important viscosity difference. Various methods of preparation and parameters of mixtures were tested. Morphology was evaluated by the analysis of electronic microscopy images.The average radiuses of the dispersed PS phase were compared with those observed in the literature. The smallest that we obtained have an average radius of 50 nm. Binary mixtures 90/10 %m with PS or PE and with a thermodur polyepoxide (MDEA/DGEBA) were also realized. The smallest spherical nodules that we obtained have an average radius of the order of 65 nm.
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François Pierrot. Polymérisation in-situ en milieu fondu et sous écoulement élongationnel pour l'élaboration de nouveaux matériaux. Autre. Université de Strasbourg, 2018. Français. ⟨NNT : 2018STRAE011⟩. ⟨tel-02049729⟩

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