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“One-pot” aminolysis/thia-Michael addition preparation of well-defined amphiphilic PVDF- b -PEG- b -PVDF triblock copolymers: self-assembly behaviour in mixed solvents

Abstract : Polyvinylidene fluoride-(PVDF) containing block copolymers are scarce and difficult to prepare. Amphiphilic block copolymers containing PVDF have been rarely reported. In consequence, few studies of the self-assembly of PVDF-based block copolymers exist. Here a new synthetic route to prepare poly(vinylidene fluoride)-block-poly(ethylene glycol)-block-poly(vinylidene fluoride) (PVDF-b-PEG-b-PVDF) ABA triblock copolymer is presented. The synthesis relies on the efficient coupling of a PVDF prepared by RAFT and a PEG diacrylate in one pot via aminolysis of the xanthate moiety and subsequent thia-Michael addition. The novel amphiphilic triblock copolymer was fully characterized by 1 H and 19 F NMR spectroscopies, GPC, TGA, DSC and XRD; and its self-assembly in water and ethanol was studied. Micellization (addition of a selective solvent for PVDF to a solution of the triblock) and nanoprecipitation (addition of a solution of the triblock into a non solvent of PVDF) protocols led to the formation of micelles and vesicles. Surprisingly, under nanoprecipitation conditions (in THF/ ethanol), well-defined crystalline micrometric structures were obtained.
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https://hal.umontpellier.fr/hal-02462556
Contributeur : Icg Aigle <>
Soumis le : dimanche 15 novembre 2020 - 17:02:16
Dernière modification le : jeudi 16 septembre 2021 - 12:40:05
Archivage à long terme le : : mardi 16 février 2021 - 18:20:10

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Enrique Folgado, Marc Guerre, Antonio da Costa, Anthony Ferri, Ahmed Addad, et al.. “One-pot” aminolysis/thia-Michael addition preparation of well-defined amphiphilic PVDF- b -PEG- b -PVDF triblock copolymers: self-assembly behaviour in mixed solvents. Polymer Chemistry, Royal Society of Chemistry - RSC, 2020, 11 (2), pp.401-410. ⟨10.1039/c9py00970a⟩. ⟨hal-02462556⟩

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