Well-Defined Lactose-Containing Polymer Grafted onto Silica Particles

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Abstract

Reversible addition-fragmentation chain transfer (RAFT) polymerization of 2-O-meth-acryloyloxyethoxyl-(2,3,4,6-tetra-O-acetyl-beta-D-galactopyranosyl)-(1-4)-2,3,6-tri-O-acetyl-beta-D-glucopyranoside (MAEL) was performed directly in CHCl3 solutions using cumyl dithiobenzoate (CDB) as the chain transfer agent to give well-defined glycopolymers. The chemical composition and structure of the glycopolymer were characterized by 1HNMR, FTIR, and SEC. The living glycopolymer chains were subsequently grafted onto gamma-methacryloxypropyl-trimethoxy (MPTMS) modified silica particles. The acetyl groups of the poly(MAEL) grafted onto the silica gel particles were converted to the hydroxyl groups with CH3ONa/CH3OH, thus obtaining silica gel particles modified with well-defined lactose-carrying polymer.

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