Control of methyl methacrylate radical polymerization via Enhanced Spin Capturing Polymerization (ESCP)

Zang, L., Wong, E. H. H., Barner-Kowollik, C., & Junkers, T. (2010) Control of methyl methacrylate radical polymerization via Enhanced Spin Capturing Polymerization (ESCP). Polymer, 51(17).

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The nitrone mediated polymerization of methyl methacrylate (MMA) via the enhanced (termination) spin capturing polymerization (ESCP) process is made possible via the addition of small amounts of styrene (between 5 and 10 vol.%) to the reaction mixture. Efficient control over the molecular weight between 7000 and 57,000 g mol-1 (at 60 °C) yields macromolecules that feature a mid-chain alkoxyamine functionality and are rich in methyl methacrylate. The collated kinetic and molecular weight data allow for a deduction of the spin capturing constant, CSC, in the range between 0.15 and 0.30. During the ESCP process, the number average molecular weight, Mn, of the formed mid-chain functional polymer is constant up to high monomer to polymer conversions (i.e. 80%). The high degree of alkoxyamine mid-chain functionality present in the generated polymeric material is evidenced via a subsequent nitroxide-mediated polymerization process employing the formed ESCP polymer, indicating a chain extension from 37,700 to 118,000 g mol-1 with a concomitant reduction in polydispersity (from 2.3 to 1.5). © 2010 Elsevier Ltd.

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ID Code: 99260
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :17
Export Date: 5 September 2016
Correspondence Address: Barner-Kowollik, C.; Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 18, 76128 Karlsruhe, Germany; email:
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Keywords: Enhanced (termination) spin capturing polymerization (ESCP), Methyl methacrylate (MMA), Nitrone/nitroxide, Alkoxyamines, Chain extension, Concomitant reduction, Efficient control, Methyl methacrylates, Nitrones, Nitroxide mediated polymerization, Number average molecular weight, Polymeric material, Polymerization of methyl methacrylate, Radical polymerization, Reaction mixture, Esters, Functional polymers, Polydispersity, Polymerization, Spin dynamics, Styrene, Acrylic monomers, chemical reaction, dispersion, molecular weight, monomer
DOI: 10.1016/j.polymer.2010.06.040
ISSN: 00323861
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 06 Oct 2016 03:56

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