Alexandre, Michaël[Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Germany and University of Liège (ULg) > The Department of chemistry of the Liège University > Center for Education and Research on Macromolecules (CERM, Liège) > >]
[en] colloids ; silica nanoparticle ; radical polymerization ; atom transfer radical polymerization (ATRP)
[en] The surface of silica nanoparticles is modified using the “grafting from” technique. A multi-step reaction is conducted to modify their surface properties. (3-glycidoxypropyl) trimethoxysilane (GPS) is used as the coupling agent for the fixation of atom transfer radical polymerization (ATRP) initiator. The grafting efficiency of GPS mixed with aqueous suspension of silica nanoparticles is studied, followed by the coupling efficiency towards ATRP initiator. The bromide concentration of ATRP initiator is kept constant for comparative kinetic studies of styrene and MMA polymerizations. The consequences at high conversions and the particle size distribution are studied. The behaviour of the glass transition temperature of either polymer-modified particles and the nature of dispersion of polymer-coated silica particles are analyzed.
Center for Education and Research on Macromolecules (CERM)
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; The DAAD-HGF fellowship