DIFFUSION-ORDERED SPECTROSCOPY NMR-DOSY: NEW VERSATILE TOOL TO FOLLOW NITROXYDE MEDIATED POLYMERIZATION OF POLYMETHYL METHACRYLAYE

Abstract

During the last decade, the use of Diffusion-Ordered Spectroscopy DOSY Nuclear Magnetic Resonance NMR technique, has known a real explosion in many fields. In this work, attention was given for the first use of this technique as efficient tool to follow the Nitroxide Mediated Polymerization NMP of Methyl Methacrylate MMA monomer, well-known as a complex monomer to polymerize by NMP. The obtained results showed that the applied 2D NMR experiments were successfully curried out to confirm the non-controlled polymerization of pure MMA by NMP. Moreover the livingness of the PMMA chains, growth in the presence of a small styrene amount, were also confirmed using this same versatile tool, without requiring long time analysis or any particular sample preparations, contrary to the chromatographic techniques