Elaboration de nanoparticules à base de glycopolymères anti-biofilms/antibactériens par auto-assemblage induit par la polymérisation.

Elaboration de matériaux polymères poreux pour l’adsorption du gaz naturel et de l’hydrogène

Caractérisation en solution aqueuse de nanocylindres supramoléculaires redox-sensibles (suite du précédent posdoctorat).

Nanocylindres supramoléculaires redox-sensibles permettant la stabilisation réversible d’émulsion.

Thesis under the supervision of Pr. Laurent Fontaine and Pr. Véronique Montembault in collaboration with the company TELENE, ENSAM and IFREMER.Ring-opening metathesis polymerization of antioxidant-functionalized monomers to improve agingproperties of polydicylopentadiene materials.Abstract : Polydicyclopentadiene (PDCPD) is a thermoset polymer material with particularly interesting properties: it combines high impact resistance, good resistance to chemical corrosion and high heat deflection temperature. These features allow to consider its use in extreme conditions as a pipeline joint for the extraction of offshore oil. However, its use is limited by its oxidation sensibility because of the presence of double bonds in its backbone. Adding additives to PDCPD materials is needed to limit the PDCPD degradation by inhibitionof oxidation. However, conventional additives undergo diffusion that decreases their long-term efficacybecause of their low molar mass. To address this issue, two strategies were studied:(1) the grafting of additives with antioxidant properties within the backbone by ring-openingmetathesis polymerization (ROMP) of dicyclopentadiene (DCPD) with norbornenyl antioxidant-functionalized comonomers; (2) ROMP of these monomers to prepare additives with highermolar masses, which are less likely to undergo diffusion. The original materials obtained from industrial formulations based on PDCPD and the synthesized monomers and polymers have shown a better stability than the formulations based on commercially available additives, confirming the relevance of the strategies implemented in this thesis work.