Article

Synthesis and Structure – Property Relationships for Regular Multigraft Copolymers

  1. Jimmy W. Mays1,2,
  2. David Uhrig3,
  3. Samuel Gido4,
  4. Yuqing Zhu4,
  5. Roland Weidisch5,
  6. Hermis Iatrou6,
  7. Nikos Hadjichristidis6,
  8. Kunlun Hong2,
  9. Frederick Beyer7,
  10. Ralf Lach5,8,
  11. Matthias Buschnakowski8

Article first published online: 27 SEP 2004

DOI: 10.1002/masy.200451110

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Proceedings of the 2003 International Symposium on Ionic Polymerization and Related Processes

Volume 215, Issue 1, pages 111–126, August 2004

Additional Information

How to Cite

Mays, J. W., Uhrig, D., Gido, S., Zhu, Y., Weidisch, R., Iatrou, H., Hadjichristidis, N., Hong, K., Beyer, F., Lach, R. and Buschnakowski, M. (2004), Synthesis and Structure – Property Relationships for Regular Multigraft Copolymers. Macromol. Symp., 215: 111–126. doi: 10.1002/masy.200451110

Author Information

  1. 1

    Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA

  2. 2

    Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

  3. 3

    School of Chemistry, Physics, and Earth Sciences, Flinders University, GPO Box 2100, Adelaide SA 5001, Australia

  4. 4

    Department of Polymer Science and Engineering, University of Massachusetts at Amherst, Amherst, MA 01003, USA

  5. 5

    Polymer Research Institute, 01068 Dresden, Germany

  6. 6

    Department of Chemistry, University of Athens, Athens 157 71, Greece

  7. 7

    U.S. Army Research Laboratory, Polymers Research Branch, Aberdeen Proving Ground, MD 21005, USA

  8. 8

    Dept. of Materials Science, University Halle-Wittenberg, 06099 Halle, Germany

Publication History

  1. Issue published online: 27 SEP 2004
  2. Article first published online: 27 SEP 2004

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Keywords:

  • anionic polymerization;
  • graft copolymer;
  • mechanical properties;
  • molecular architecture;
  • morphology

Abstract

Multigraft copolymers with polyisoprene backbones and polystyrene branches, having multiple regularly spaced branch points, were synthesized by anionic polymerization high vacuum techniques and controlled chlorosilane linking chemistry. The functionality of the branch points (1, 2 and 4) can be controlled, through the choice of chlorosilane linking agent. The morphologies of the various graft copolymers were investigated by transmission electron microscopy and X-ray scattering. It was concluded that the morphology of these complex architectures is governed by the behavior of the corresponding miktoarm star copolymer associated with each branch point (constituting block copolymer), which follows Milner's theoretical treatment for miktoarm stars. By comparing samples having the same molecular weight backbone and branches but different number of branches it was found that the extent of long range order decreases with increasing number of branch points. The stress-strain properties in tension were investigated for some of these multigraft copolymers. For certain compositions thermoplastic elastomer (TPE) behavior was observed, and in many instances the elongation at break was much higher (2-3X) than that of conventional triblock TPEs.

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