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Title: Nitrone-Mediated Radical Coupling of Polymers Derived from Reverse Iodine-Transfer Polymerization
Authors: RANIERI, Kayte 
Barner-Kowollik, Christopher
JUNKERS, Thomas 
Issue Date: 2014
Source: MACROMOLECULAR CHEMISTRY AND PHYSICS, 215 (20), p. 1991-2000
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 x(c) = 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.
Notes: [Ranieri, Kayte; Vandenbergh, Joke; Junkers, Thomas] Hasselt Univ, Inst Mat Res Imo Imomec, B-3590 Diepenbeek, Belgium. [Barner-Kowollik, Christopher] Karlsruhe Inst Technol, Inst Tech Chem & Polymerchem, D-76128 Karlsruhe, Germany. [Barner-Kowollik, Christopher] Karlsruhe Inst Technol, Inst Biol Grenzflachen, D-76344 Eggenstein Leopoldshafen, Germany.
Keywords: kinetics(polym); reverse-iodine transfer; polymerization; radical coupling; spin trapping
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ISSN: 1022-1352
e-ISSN: 1521-3935
DOI: 10.1002/macp.201300740
ISI #: 000344230700007
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Category: A1
Type: Journal Contribution
Validations: ecoom 2015
Appears in Collections:Research publications

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