Influence of the Z-group on the RAFT-mediated polymerizations in nanoreactors

Authors

  • David Valade,

    1. Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane 4072, Queensland, Australia
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  • Yujung Jeon,

    1. Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane 4072, Queensland, Australia
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  • Stefanie Kessel,

    1. Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane 4072, Queensland, Australia
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  • Michael J. Monteiro

    Corresponding author
    1. Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane 4072, Queensland, Australia
    • Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane Queensland 4072, Australia
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Abstract

In this work, we showed that the self-assembly behavior of the macro-chain transfer agent P(DMA69-b-NIPAM60)-S[BOND](C[DOUBLE BOND]S)[BOND]S[BOND]C12H25 [dodecyltrithiocarbonate (DTTC)] was very different to P(DMA68-b-NIPAM62)-S[BOND](C[DOUBLE BOND]S)[BOND]S[BOND]C4H9 [butyltrithiocarbonate (BTTC)], resulting in very different water-based nanoreactor polymerizations. The DTTC diblock formed small aggregates below the lower critical solution temperature (LCST), which increased slightly above the LCST. This is in contrast to the BTTC diblock, in which unimers existed below the LCST and large aggregates of core–shell nanoreactors were present above the LCST. Polymerization of styrene in the DTTC diblock nanoreactors afforded fast rates of polymerization with the production of narrow molecular weight and particle size distributions. We found a direct relationship between the size and the targeted molecular weight; the greater the targeted the molecular weight the greater the particle size. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012

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