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- Title
Nitrone-Mediated Radical Coupling of Polymers Derived from Reverse Iodine-Transfer Polymerization.
- Authors
Ranieri, Kayte; Vandenbergh, Joke; Barner‐Kowollik, Christopher; Junkers, Thomas
- Abstract
The current study describes the synthesis of iodine-end-capped polystyrene (PS) and poly(methyl methacrylate) (PMMA) precursors using reverse iodine-transfer polymerization, which, in a second step, are used in nitrone-mediated radical coupling (NMRC) reactions. Initially, the reverse iodine polymerization of both monomers is studied and optimized in order to obtain iodine-end-capped materials with controlled molecular weights and low dispersities. Subsequently, NMRC of both PS and PMMA precursors is carried out in the presence of CuCl as a halide-exchange agent. Coupling efficiencies of xc = 0.754 for PS-I and 0.84 for PMMA-I are observed; however, the addition of 10 equivalents of styrene is required to promote the coupling in the case of methacrylate. The presence of the desired alkoxyamine functionality in mid-chain position of the products is evidenced via quenching experiments.
- Subjects
NITRONE derivatives; POLYMERIZATION; POLYMETHYLMETHACRYLATE; POLYSTYRENE; COUPLING reactions (Chemistry); IODINE compounds synthesis
- Publication
Macromolecular Chemistry & Physics, 2014, Vol 215, Issue 20, p1991
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201300740