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Exponential and non-exponential relaxation and early state of spinodal decomposition in polymer blends by SANS

  • D. Schwahn
  • S. Janßen
  • T. Springer
Chapter
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 91)

Abstract

With neutron small-angle scattering it was found, for two different polymer blends, that the time-dependent structure factor S(Q, t) relaxes exponentially or also non-exponentially after a temperature step has been applied. The classical Cahn-Hilliard-Cook theory predicts an exponential time behaviour of S(Q, t). The observed deviations may be due to the correlation of the order parameter with internal motions of the polymer segments or with other internal variables of a viscoelastic material near its glass transition.

Key words

Polymer blends spinodal decomposition relaxation segmental motion viscoelastic material 

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References

  1. 1.
    Cahn JW (1961) Acta Metallogr 9:795–801CrossRefGoogle Scholar
  2. 2.
    Cook HE (1970) Acta Metallogr 18:297–306CrossRefGoogle Scholar
  3. 3.
    de Gennes PG (1979) Scaling Concepts in Polymer Physics. Cornell University Press, IthacaGoogle Scholar
  4. 4.
    Binder K (1983) J Chem Phys 79:6387–6409CrossRefGoogle Scholar
  5. 5.
    Strobl GR (1985) Micromolecules 18:558–563CrossRefGoogle Scholar
  6. 6.
    Schwahn D, Springer T, Janßen S (1991) Physica B 174:159–163CrossRefGoogle Scholar
  7. 7.
    Schwahn D, Janßen S, Springer T (1990) J Chem PHys, accepted for publicationGoogle Scholar
  8. 8.
    Schwahn D, Hahn K, Streib J, Springer T (1990) J Chem Phys 93:8383–8391CrossRefGoogle Scholar
  9. 9.
    Jäckle J, Pieroth M (1988) Z Phys B 72:25–39CrossRefGoogle Scholar
  10. 10.
    Akcasu AZ (1989) Macromolecules 22:3682–3689CrossRefGoogle Scholar

Copyright information

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

Authors and Affiliations

  • D. Schwahn
    • 1
  • S. Janßen
    • 1
  • T. Springer
    • 1
  1. 1.Forschungszentrum Jülich GmbH Institut für FestkörperforschungJülichFRG

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