Détails de la Mission
Polymer latexes from emulsion polymerization mediated by hydrophilic polymer chains obtained by reversible-deactivation radical polymerization
Organic latexes are usually stabilized by low molar mass surfactants, but there is growing interest in reducing their use.
Indeed, surfactants can have detrimental effects on the latex stability when frozen or subjected to high shear, and in many cases they can also diminish the properties of the resulting films when exposed to water or high humidity.
Finally, the use of molecular surfactants that are simply absorbed onto the surface of latex particles also raises environmental concerns, in particular the need for the treatment of aqueous effluents.
The C2P2 group is involved in extensive research in the chemistry and engineering of aqueous emulsion polymerizations for over 30 years.
Recently, the use of reactive hydrophilic chains obtained by reversibledeactivation radical polymerization (RDRP) in emulsion polymerization has been developed to produce surfactantfree latexes.
The formed amphiphilic block copolymers play the role of macromolecular stabilizers covalently anchored at the surface of the final particles.
Relying on the expertise of the C2P2 in both RDRP and polymerization in dispersed media, the aim of the present project is the synthesis of various surfactant-free latexes using various hydrophilic polymer chains obtained by RDRP.
The project will be developed in the frame of an industrial collaboration with Arkema (CIFRE funding).
you have a Master degree and have experience in polymer chemistry (preferably free radical polymerization) and / or physico-chemistry of polymer colloids.
A strong command of written and spoken English is necessary.