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Copolymères diblocs amphiphiles et thermostimulables : synthèse contrôlée et étude préliminaire de leur auto-organisation

Abstract : The development of new biodegradable diblock copolymers poly([epsilon]-caprolactone)-b-poly[oligo(ethylene glycol)methyl ether methacrylate], which could be used in environmental friendly applications such as treatment of contaminated water has been the main goal of this work. For the preparation these copolymers, the ring-opening polymerization (ROP) and the Atom Transfer Radical Polymerization (ATRP) were combined by using a bifunctional initiator. The two-step route for the synthesis of these copolymers was using either ATRP or ROP as first step and the other polymerization secondly. Each polymerization was studied carefully in order to control the macromolecular parameters of the copolymers. On the one hand, the ATRP of methacrylates bearing oligo(ethylene glycol) was carried out by using poly([epsilon]-caprolactone) with bromide end-group as macroinitiator. On the other hand, the ring opening polymerization of [epsilon]-caprolactone was initiated by the hydroxyl end-group of the poly[oligo(ethylene glycol)methyl ether methacrylate], using tin octoate, tin tetrakis(phenylethynyl) or bismuth triflate as catalysts. The Low Critical Solution Temperature (LCST) of these amphiphilic diblock copolymers in aqueous medium have been determined by UV-visible spectroscopy. Their micellar behaviors were also studied by measuring size by HPPS
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Hicham Qayouh. Copolymères diblocs amphiphiles et thermostimulables : synthèse contrôlée et étude préliminaire de leur auto-organisation. Alimentation et Nutrition. Université de Lorraine, 2013. Français. ⟨NNT : 2013LORR0230⟩. ⟨tel-01750718⟩

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