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Polymérisation par voie RAFT en dispersion organique : synthèse de copolymères à blocs et autoassemblage simultanés

Lisa Houillot 1
1 LCP - Chimie des polymères
UPMC - Université Pierre et Marie Curie - Paris 6, IPCM - Institut Parisien de Chimie Moléculaire, CNRS - Centre National de la Recherche Scientifique : UMR7610
Abstract : RAFT-mediated controlled free-radical polymerization has been developed in an oil surfactant-free dispersed system: this system involves the dispersion polymerization of methyl acrylate in isododecane using soluble macromolecular RAFT agents (poly(2-ethylhexyl acrylate)) based either on a dithiobenzoate reactive group or on a trithiocarbonate one. The conditions to find a good control over the polymer chain growth together with formation of well-defined, self-stabilized particles have been examined. The process takes advantage of the in situ formation of amphiphilic block copolymers that self-assemble simultaneously with the growth step to form block copolymer micelles. The reactions are performed in very simple conditions, at high concentration and with a limited number of reactants. The comparison of the two systems, together with a detailed 2D chromatography characterization of the block copolymers enabled us to propose a mechanism. It appears that the quality of control over both the macromolecular structure and the colloidal characteristics strongly depends on the reactivity of the macroRAFT agent and its solvophilic/solvophobic character.
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  • HAL Id : tel-00812126, version 1

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Lisa Houillot. Polymérisation par voie RAFT en dispersion organique : synthèse de copolymères à blocs et autoassemblage simultanés. Chimie inorganique. Université Pierre et Marie Curie - Paris VI, 2008. Français. ⟨NNT : 2008PA066604⟩. ⟨tel-00812126⟩

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