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Living free-radical polymerization of styrene under a constant source of γ radiation

Authors

  • John F. Quinn,

    1. Centre for Advanced Macromolecular Design, School of Chemical Engineering and Industrial Chemistry, University of New South Wales, Sydney 2052, Australia
    2. CRC for Polymers, 32 Business Park Drive, Notting Hill, Victoria 3168, Australia
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  • Leonie Barner,

    1. Centre for Advanced Macromolecular Design, School of Chemical Engineering and Industrial Chemistry, University of New South Wales, Sydney 2052, Australia
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  • Ezio Rizzardo,

    1. CSIRO Molecular Science, Bag 10, Clayton South, Victoria 3169, Australia
    2. CRC for Polymers, 32 Business Park Drive, Notting Hill, Victoria 3168, Australia
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  • Thomas P. Davis

    Corresponding author
    1. Centre for Advanced Macromolecular Design, School of Chemical Engineering and Industrial Chemistry, University of New South Wales, Sydney 2052, Australia
    2. CRC for Polymers, 32 Business Park Drive, Notting Hill, Victoria 3168, Australia
    • CRC for Polymers, 32 Business Park Drive, Notting Hill, Victoria 3168, Australia
    Search for more papers by this author

Abstract

Living polymerization of styrene was observed using γ radiation as a source of initiation and 1-phenylethyl phenyldithioacetate as a reversible addition–fragmentation chain transfer (RAFT) agent. The γ radiation had little or no detrimental effect on the RAFT agent, with the molecular weight of the polymer increasing linearly with conversion (up to the maximum measured conversions of 30%). The polymerization had kinetics (polym.) consistent with those of a living polymerization (first order in monomer) and proportional to the square root of the radiation-dose rate. This initiation technique may facilitate the grafting of narrow polydispersity, well-defined polymers onto existing polymer surfaces as well as allow a wealth of kinetic experiments using the constant radical flux generated by γ radiation. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 40: 19–25, 2002

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