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COPOLYMÈRES À BLOCS « HYBRIDES » À BASE DE XYLOGLUCANE ET DE POLYMÈRE VINYLIQUE EN COMBINANT MODIFICATION CHIMIO-ENZYMATIQUE ET POLYMÉRISATION RADICALAIRE CONTRÔLÉE

Abstract : Xyloglucan from tamarind seeds (XG) is a natural occurring polysaccharide. The association of the xyloglucan with a vinylic polymer part in an “hybrid” natural/synthetic block copolymer architecture gives the possibility to take advantages of its self-assembly in aqueous solution. We propose in this manuscript two synthetic strategies giving rise to “hybrid” block copolymers, based on chemo-enzymatic modification of xyloglucan oligosaccharides and controlled radical polymerization MADIX of vinylic monomers: acrylamide (Am), vinyl acetate (AcV), N-vinyl-2-pyrrolidone (NVP). The “starting from” strategy consists in MADIX controlled radical polymerization of a vinylic monomer starting from a modified oligosaccharide bearing one/two polymerizable group(s). The “coupling onto” strategy consists in a coupling by “click chemistry” between vinylic polymer obtained by controlled radical polymerization of a chain transfer agent bearing an azide function and a modified oligosaccharide bearing an alkyne function. Four families of “hybrid” block copolymers were thus obtained (XG-b-PAm, PAm-b-XG-b-PAm, XG-b-PAcV, XG-b-PNVP). A previous physic-chemical study in solution of these copolymers has also been achieved suggesting the formation of polymersomes.
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https://tel.archives-ouvertes.fr/tel-00495724
Contributor : Jérôme Lohmann <>
Submitted on : Monday, June 28, 2010 - 3:59:56 PM
Last modification on : Friday, November 6, 2020 - 4:06:28 AM
Long-term archiving on: : Thursday, September 30, 2010 - 5:31:16 PM

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Jérôme Lohmann. COPOLYMÈRES À BLOCS « HYBRIDES » À BASE DE XYLOGLUCANE ET DE POLYMÈRE VINYLIQUE EN COMBINANT MODIFICATION CHIMIO-ENZYMATIQUE ET POLYMÉRISATION RADICALAIRE CONTRÔLÉE. Chimie. Université Joseph-Fourier - Grenoble I, 2009. Français. ⟨tel-00495724⟩

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