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http://hdl.handle.net/1942/18034
Title: | Nitrone-Mediated Radical Coupling of Polymers Derived from Reverse Iodine-Transfer Polymerization | Authors: | RANIERI, Kayte VANDENBERGH, Joke Barner-Kowollik, Christopher JUNKERS, Tanja |
Issue Date: | 2014 | Publisher: | WILEY-V C H VERLAG GMBH | 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 | Document URI: | http://hdl.handle.net/1942/18034 | 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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rranieri 1.pdf | Published version | 1.28 MB | Adobe PDF | View/Open |
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