Chain fragmentation and fragment diffusion at the glass transition

  • G. P. Hellmann
  • E. H. Hellmann
  • A. R. Rennie
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 91)


Polymer chain diffusion was measured by SANS using a new technique. The chains of a copolycarbonate were fragmented, in blends with tetramethylpolycarbonate, in the glassy state, so that the split chains remained first conformationally intact. The subsequent diffusion of the chain fragments alters the structure factor of the blend. This was monitored by SANS and interpreted in terms of center-of-mass diffusion.

Key words

Chain fragmentation chain diffusion polymer blends neutron scattering 


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  1. 1.
    Strobl GR (1985) Macromolecules 18:558CrossRefGoogle Scholar
  2. 2.
    Hellmann EH, Hellmann GP, Rennie AR (1991) Macromolecules 24:3821CrossRefGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1993

Authors and Affiliations

  • G. P. Hellmann
    • 3
  • E. H. Hellmann
    • 1
  • A. R. Rennie
    • 2
  1. 1.Max-Planck-Institut für Polymerforschung MainzFRG
  2. 2.Institut Laue-Langevin GrenobleFrance
  3. 3.Deutsches Kunststoff InstitutDarmstadtFRG

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