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  • An emulsifier-free RAFT-mediated process for the efficient synthesis of cerium oxide/polymer hybrid latexes.

An emulsifier-free RAFT-mediated process for the efficient synthesis of cerium oxide/polymer hybrid latexes.

Macromolecular rapid communications (2012-05-19)
Jérôme Garnier, Jérôme Warnant, Patrick Lacroix-Desmazes, Pierre-Emmanuel Dufils, Jérôme Vinas, Yves Vanderveken, Alex M van Herk
ABSTRACT

Hybrid latexes based on cerium oxide nanoparticles are synthesized via an emulsifier-free process of emulsion polymerization employing amphiphatic macro-RAFT agents. Poly(butyl acrylate-co-acrylic acid) random oligomers of various compositions and chain lengths are first obtained by RAFT copolymerization in the presence of a trithiocarbonate as controlling agent. In a second step, the seeded emulsion copolymerization of styrene and methyl acrylate is carried out in the presence of nanoceria with macro-RAFT agents adsorbed at their surface, resulting in a high incorporation efficiency of cerium oxide nanoparticles in the final hybrid latexes, as evidenced by cryo-transmission electron microscopy.

MATERIALS
Product Number
Brand
Product Description

Supelco
Butyl acrylate, analytical standard
Sigma-Aldrich
Butyl acrylate, ≥99%, contains 10-60 ppm monomethyl ether hydroquinone as inhibitor
Sigma-Aldrich
Butyl acrylate, SAJ first grade, ≥99.0%