Chapter 26. Reversible Addition Fragmentation Chain Transfer Mediated Dispersion Polymerization of Styrene

  1. Prof. Dr. Michael Buback2 and
  2. A. M. van Herk3
  1. Prakash J. Saikia,
  2. Jung Min Lee,
  3. Byung H. Lee and
  4. Soonja Choe

Published Online: 31 MAY 2007

DOI: 10.1002/9783527610860.ch26

Radical Polymerization: Kinetics and Mechanism, Volume 248

Radical Polymerization: Kinetics and Mechanism, Volume 248

How to Cite

Saikia, P. J., Lee, J. M., Lee, B. H. and Choe, S. (2007) Reversible Addition Fragmentation Chain Transfer Mediated Dispersion Polymerization of Styrene, in Radical Polymerization: Kinetics and Mechanism, Volume 248 (eds M. Buback and A. M. van Herk), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany. doi: 10.1002/9783527610860.ch26

Editor Information

  1. 2

    Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany

  2. 3

    Laboratory for Polymer Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands

Author Information

  1. Department of Chemical Engineering, Inha University, 253 Yonghyundong, Namgu, Incheon, Republic of Korea 402-751, Korea

Publication History

  1. Published Online: 31 MAY 2007
  2. Published Print: 13 APR 2007

ISBN Information

Print ISBN: 9783527320561

Online ISBN: 9783527610860

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Keywords:

  • radical polymerization;
  • kinetics;
  • mechanism;
  • polymerization in heterogeneous systems;
  • polymerization of styrene;
  • living radical dispersion polymerization;
  • nucleation;
  • particle size distribution;
  • RAFT;
  • stability;
  • preaddition of RAFT agent;
  • postaddition of RAFT agent

Summary

Polystyrene microspheres have been synthesized by the reversible addition-fragmentation chain transfer (RAFT) mediated dispersion polymerization in an alcoholic media in the presence of poly(N-vinylpyrrolidone) as stabilizer and 2,2′-azobisisobutyronitrile as a conventional radical initiator. In order to obtain monodisperse polystyrene particles with controlled architecture, the post–addition of RAFT agent was employed to replace the weak point from the pre-addition of RAFT. The feature of preaddition and postaddition of RAFT agent was studied on the polymerization kinetics, particle size and its distribution and on the particle stability. The living polymerization behaviour as well as the particle stability was observed only in the postaddition of RAFT. The effects of different concentration on the postaddition of RAFT agent were investigated in terms of molecular weight, molecular weight distribution, particle size and its distribution. The final polydispersity index (PDI) value, particle size and the stability of the dispersion system were found to be greatly influenced by the RAFT agent. This result showed that the postaddition of RAFT agent in the dispersion polymerization not only controls the molecular weight and PDI but also produces stable monodisperse polymer particles.