Élaboration contrôlée de glycopolymères amphiphiles à partir de polysaccharide : synthèse de Dextrane-g-PMMA par polymérisation radicalaire par transfert d'atome

Abstract : Synthesis of the new comb-like amphiphilic glycopolymer dextran-g-poly(methyl methacrylate) was obtained thanks to an Atom Transfert Radical Polymerization (ATRP). In order to control the macromolecular parameters of these biocompatible and partly biodegradable glycopolymers, the grafting from strategy was applied using two different multi-step pathways. The first one is composed of four steps: partial acetylation of dextran hydroxyl groups; introduction of initiator groups convenient for ATRP; ATRP of methyl methacrylate in dimethylsulfoxide; acetyl group deprotection under mild conditions. The second pathway allows us to obtain such glycopolymers in only two steps: direct introduction of the same initiator groups onto the dextran chain and subsequent ATRP of methyl methacrylate in dimethylsulfoxide. Throughout the synthesis, detailed studies of each step enabled us to estimate the length of the dextran backbone and to assure the control of copolymer architecture in terms of graft number and graft length. Preliminary interfacial tension measurements highlighted the surfactant properties of such glycopolymers
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Julien Dupayage. Élaboration contrôlée de glycopolymères amphiphiles à partir de polysaccharide : synthèse de Dextrane-g-PMMA par polymérisation radicalaire par transfert d'atome. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2009. Français. ⟨NNT : 2009INPL011N⟩. ⟨tel-01748712⟩

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