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Une entreprise innovante dans le domaine des polymères recherche un candidat passionné pour un projet de recherche sur les monomères biosourcés. Vous aurez l'opportunité de travailler sur la synthèse de nouveaux copolymères de polylactide et de participer à des analyses avancées de microstructure et de propriétés thermiques. Ce projet, d'une durée de 18 à 24 mois, est idéal pour un doctorant désireux de contribuer à des solutions durables en matière de matériaux. Rejoignez une équipe dynamique où votre expertise en chimie des polymères fera une différence significative dans le développement de nouveaux produits respectueux de l'environnement.
The use of biobased monomers as feedstock for the synthesis of polymers is a growing field, motivated by both environmental concerns and the decrease of the world oil reserves. Among the different biobased polymers available on the market, polylactide (PLA) is becoming more and more competitive and its production is growing. This biodegradable and biocompatible polyester is synthesized either by direct polycondensation of lactic acid, resulting from the fermentation of agroresources, or by Ring Opening Polymerization (ROP) of lactide, a cyclic ester derived from oligomerization-cyclization of lactic acid. ROP polymerization, which leads to the formation of PLA of high molar masses, requires the use of an initiator which initiates the opening of lactide and its polymerization. Among commercial lactides, L-lactide (L-LA), resulting from the cyclization of the L-isomer of lactic acid, is particularly interesting since it leads to isotactic polylactide PLLA, a semi-crystalline material. However, its brittleness sometimes makes it unsuitable as a substitute for plastics used for everyday-life products.
Chain shuttling copolymerization has been a breakthrough in the field of olefin polymerization affording the production of new polyolefin specialties (Infuse) for applications as adhesives and elastomers notably. We have transposed the concept to polylactide, yielding new multiblock copolymers. The objective of this project funded by the ANR involves:
Place: Unity of Catalysis and Solid State Chemistry, C3 Building, and UMET, C6 building, Cité Scientifique, Villeneuve d’Ascq
Period: Starting end / beginning, for 18 to 24 months according to experience
Geographic mobility: No business trip
Telework: Full time
Profile: PhD in polymer synthesis and characterization. Experience in mechanical characterization of polymers will be a plus.