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<dc:title xml:lang="fr">Polymérisation in-situ en milieu fondu et sous écoulement élongationnel pour l'élaboration de nouveaux matériaux</dc:title>
<dcterms:alternative xml:lang="en">In-situ melt polymerization under elongational flow for the development of new materials</dcterms:alternative>
<dc:subject xml:lang="fr">Polymérisation in-situ</dc:subject>
<dc:subject xml:lang="fr">Mélange de polymères</dc:subject>
<dc:subject xml:lang="fr">Thermoplastique</dc:subject>
<dc:subject xml:lang="fr">Thermodur</dc:subject>
<dc:subject xml:lang="fr">Mélangeur élongationnel</dc:subject>
<dc:subject xml:lang="fr">Séparation de phase</dc:subject>
<dc:subject xml:lang="fr">Miscibilité</dc:subject>
<dc:subject xml:lang="fr">Cinétique de polymérisation</dc:subject>
<dc:subject xml:lang="fr">PMMA</dc:subject>
<dc:subject xml:lang="fr">PE</dc:subject>
<dc:subject xml:lang="fr">PS</dc:subject>
<dc:subject xml:lang="fr">Époxyde</dc:subject>
<dc:subject xml:lang="en">In situ Polymerization</dc:subject>
<dc:subject xml:lang="en">Mixture of polymers</dc:subject>
<dc:subject xml:lang="en">Thermoplastic</dc:subject>
<dc:subject xml:lang="en">Thermodur</dc:subject>
<dc:subject xml:lang="en">Extensional mixer</dc:subject>
<dc:subject xml:lang="en">Phase separation</dc:subject>
<dc:subject xml:lang="en">Miscibility</dc:subject>
<dc:subject xml:lang="en">Polymerization kinetics</dc:subject>
<dc:subject xml:lang="en">PMMA</dc:subject>
<dc:subject xml:lang="en">PE</dc:subject>
<dc:subject xml:lang="en">PS</dc:subject>
<dc:subject xml:lang="en">Epoxide</dc:subject>
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<tef:elementdEntree autoriteExterne="027507211" autoriteSource="Sudoc">Thermoplastiques</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="031690882" autoriteSource="Sudoc">Alliages de polymères</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Dans ce travail de thèse, des mélanges réactifs de polymères thermoplastiques immiscibles PMMA,PE et PS ont été réalisés dans un mélangeur (RMX®) qui génère principalement des écoulements élongationnels connus pour leurs pouvoirs distributifs et dispersifs même lorsque les composants ont une différence de viscosité importante. La polymérisation in-situ du styrène a été conduite par auto-polymérisation thermique et grâce à des amorceurs radicalaires. Différentes méthodes de préparations et paramètres de mélanges ont été testés puis évalués par l’analyse d’images de microscopie électronique. Les plus petits nodules de PS que nous avons obtenus ont un rayon moyen de l’ordre de 50 nm. Des mélanges binaires 90/10 à base de PS ou PE et d’un thermodur polyépoxyde (MDEA/DGEBA) ont également été réalisés. Les nodules sphériques les plus petits que nous avons obtenus ont un rayon moyen de l’ordre de 65 nm.</dcterms:abstract>
<dcterms:abstract xml:lang="en">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.</dcterms:abstract>
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