Water-soluble oligomers bearing complexing groups have been synthesized by RAFT copolymerization using various combinations of monomers such as butyl acrylate or styrene as hydrophobic monomers and acrylic acid and/or 2-acrylamido-2-methyl propane sulfonic acid or vinyl benzyl phosphonic diacid as functional hydrophilic ionogenic monomers. Then, these oligo RAFT agents have been used to modify aqueous dispersions of CeO2 nanoparticles. The adsorption of the oligomers at the surface of the CeO2 nanoparticles has been characterized by several complementary techniques such as UV-vis spectroscopy, taking advantage of the chromophore RAFT moiety. Finally, the living CeO2 nanoparticles have been involved in emulsion copolymerization of styrene/methyl acrylate or vinylidene chloride/methyl acrylate. This strategy led to a very efficient formation of CeO2/polymer hybrid latexes, as evidenced by cryo-TEM microscopy. The correlation between the morphology of the hybrid latex particles and the composition of the oligo RAFT agents allowed us to propose mechanisms for the growth of the polymer particles. Such hybrid latexes may find applications in many areas, for instance in the elaboration of high performance coatings but also as templates for the preparation of functional organic or inorganic porous materials with CeO2 or other nanoparticles evenly distributed in the porous matrix.

Synthesis of complexing copolymers by RAFT and their use in emulsion polymerization to prepare CeO<sub>2</sub>/polymer hybrid latexes

248th National Meeting (2014)

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Synthesis of complexing copolymers by RAFT and their use in emulsion polymerization to prepare CeO2/polymer hybrid latexes

Synthesis of complexing copolymers by RAFT and their use in emulsion polymerization to prepare CeO₂/polymer hybrid latexes