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<dc:title xml:lang="fr">(Co-)polymérisation par ouverture de cycle d'anhydrides, d'époxydes ou de lactones biosourcés en présence d'organocatalyseurs pour la synthèse de polyesters ou de polyéthers</dc:title>
<dcterms:alternative xml:lang="en">Ring opening (co-)polymerization of biobased anhydrides, epoxides or lactones for the synthesis of polyesters or polyethers with organocatalyst</dcterms:alternative>
<dc:subject xml:lang="fr">Organocatalyse</dc:subject>
<dc:subject xml:lang="fr">Polymérisation par ouverture de cycle</dc:subject>
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<dc:subject xml:lang="fr">Polyéthers</dc:subject>
<dc:subject xml:lang="fr">Stéréocomplexes</dc:subject>
<dc:subject xml:lang="en">Organocatalysis</dc:subject>
<dc:subject xml:lang="en">Ring opening polymerization</dc:subject>
<dc:subject xml:lang="en">Bio-based</dc:subject>
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<tef:elementdEntree autoriteExterne="031030769" autoriteSource="Sudoc">Polymérisation par ouverture de cycle</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">En considérant l’impact environnemental et l’importance qu’ont les matériaux polymères dans notre société, le développement de matériaux issus de ressources renouvelables et qui peuvent se biodégrader est un enjeu majeur. Dans ce contexte, les travaux réalisés au cours de cette thèse ont permis plusieurs développements dans le domaine de l’organocatalyse de polymérisation et celui des matériaux biosourcés de type polyesters et polyéthers. Plus précisément, le premier exemple de thiosquaramides en tant qu’organocatalyseurs pour la synthèse de PLA a été montré. Ensuite, la synthèse de nouveaux polyesters poly(époxy-anhydrides) à partir de monomères biosourcés via ROCOP organocatalysé a été développée. Dans ces synthèses, les catalyseurs [PPN]Cl et carbènes ont ont permis d’accéder à des matériaux régioréguliers, stéréoréguliers et de haut poids moléculaire. La synthèse et caractérisation une nouvelle famille de matériaux polyéthers biosourcés de manière efficace et contrôlée via ROP des époxydes a aussi été étudiée. Pour terminer, les propriétés de certains polyesters et polyéthers ont été modifiés à travers la formation de leurs stéréocomplexes.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Considering the environmental impact and the importance of polymeric materials in our society, the development of bio-based materials and which can biodegrade is a major issue. In this context, the work carried out during this thesis has allowed several developments in the field of organocatalysis polymerization and that of bio-based materials such as polyesters and polyethers. More precisely, the first example of thiosquaramides as organocatalysts for the synthesis of PLA has been shown. Then, the synthesis of new poly(epoxy-anhydride) polyesters from biobased monomers via organocatalyzed ROCOP was developed. In these syntheses, [PPN]Cl and carbene catalysts were used to access regioregular, stereoregular and high molecular weight materials. The synthesis and characterization of a new family of biobased polyether materials in an efficient and controlled manner via epoxy ROP was also studied. Finally, the properties of some polyesters and polyethers were modified through the formation of their stereocomplexes.</dcterms:abstract>
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