Heterogeneous modification of chitosan via nitroxide-mediated polymerization

Catherine Lefay (1) , Yohann Guillaneuf (1) , Guillaume Moreira , Joel J. Thevarajah , Patrice Castignolles , Fabio Ziarelli (2) , Emily Bloch (3) , Mohamed Major , Laurence Charles (1) , Marianne Gaborieau (4) , Denis Bertin (1) , Didier Gigmes (1)

1 ICR - Institut de Chimie Radicalaire
2 FSCM - Fédération des Sciences Chimiques de Marseille
3 MADIREL - Matériaux divisés, interfaces, réactivité, électrochimie
4 Key Centre of Polymer Colloids

Chitosan (CS) was modified by SG1-based nitroxide-mediated polymerization under heterogeneous conditions. After introduction of acrylamide and/or acrylate functions onto the CS backbone followed by intermolecular 1,2 radical addition of the BlocBuilder alkoxyamine (CS–BB), methyl methacrylate (MMA) in the presence of a small amount of acrylonitrile (AN) or sodium 4-styrenesulfonate (SS) was polymerized by nitroxide-mediated polymerization (NMP). ESR and free-solution capillary electrophoresis confirmed the synthesis of CS–BB. The successful synthesis of CS-g-P(MMA-co-AN) and CS-g-PSS grafted copolymers was proved by TGA and solid-state NMR spectroscopy with ca. 20 to 30 wt% of grafted synthetic polymer in the final product.

Domaines: Chimie

Catherine Lefay, Yohann Guillaneuf, Guillaume Moreira, Joel J. Thevarajah, Patrice Castignolles, et al.. Heterogeneous modification of chitosan via nitroxide-mediated polymerization. Polymer Chemistry, 2013, 4 (2), pp.322--328. ⟨10.1039/C2PY20544K⟩. ⟨hal-01460464⟩