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Synthèse de polyéthylènes porteurs de fonctions thiol ou vinyle en extrémité de chaîne et leur utilisation dans des chimies thiol-ène

Abstract : In the world of synthetic polymers, polyethylene is produced in the greatest volume partly because the monomer can be obtained from crude oil or natural gas and the associated polymerization processes are cheap and well-established industrial tools. The resulting polymer chain which only contains hydrogen and carbon atoms suffers from the absence of polarity. As a consequence, more expensive polymers are sometimes used for applications where polyethylene could be used. Therefore, introducing polar segments in polyethylene would enable the production of new macromolecules with many desirable properties. One of the strategies that are investigated in our laboratories for the functionalization of polyethylene is the thiol-ene chemistry. This chemistry, known for the design of crosslinked networks since the mid-20th century via step growth photopolymerization, is witnessing a renewal of interest particularly in recent polymer science literature since this reaction is a versatile and very efficient tool for the functionalization of polymers. As thiol-ene chemistry requires the use of thiol and ene containing molecules, functionalized polyethylenes containing either vinyl or thiol end groups could be perfect candidates as starting materials. We investigated here the potential of such PEs to lead to end reactive PE, macromonomers or block copolymers using either radical mediated or Michael type thiol-ene chemistry
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https://tel.archives-ouvertes.fr/tel-02868913
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Submitted on : Monday, June 15, 2020 - 4:50:12 PM
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Jérôme Mazzolini. Synthèse de polyéthylènes porteurs de fonctions thiol ou vinyle en extrémité de chaîne et leur utilisation dans des chimies thiol-ène. Catalyse. Université Claude Bernard - Lyon I, 2012. Français. ⟨NNT : 2012LYO10036⟩. ⟨tel-02868913⟩

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