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Incoherent quasielastic neutron scattering study of a glass-forming liquid. A mode coupling interpretation

  • G. Floudas
  • J. S. Higgins
  • A. Burgess
Chapter
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 91)

Abstract

We report on incoherent neutron scattering results in the glass-forming liquid di-2-ethylhexyl phthalate (DOP) (T g=184 K). We are particularly interested in the temperature dependence of (i) the elastic scattered intensity, (ii) the mean-square displacement and (iii) the shear viscosity. Our neutron scattering results are internally consistent and compatible with the existence of a dynamic instability at temperatures above T g, as predicted by the recent mode coupling theory. This is in agreement with recent independent measurements on the same liquid from dielectric relaxation and depolarized Rayleigh scattering. However, an alternative approach [9] based on free-volume arguments shows no discontinuity over a broad T-range.

Key words

Glass transition incoherent neutron scattering di-2-ethylhexyl phthalate 

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References

  1. 1.
    Leutheusser E (1984) Phys Rev A 29:2765; Bengrzelius U, Götze W, Sjölander A (1984) J Phys C 17:5915; Götze W (1986) Phys Scri 34:66CrossRefGoogle Scholar
  2. 2.
    Petry W, Bartsch E, Fujara F, Kiebel M, Sillescu H, Farago B (1991) J Phys Condensed Matter 83:175CrossRefGoogle Scholar
  3. 3.
    Fujara F, Petry W (1987) Europhys Lett 4:921CrossRefGoogle Scholar
  4. 4.
    Börjesson L, Elmroth M, Torell LM (1990) Chem Phys 149:209CrossRefGoogle Scholar
  5. 5.
    Frick B, Farago B, Richter D (1990) Phys Rev Lett 64:2921; Frick B, Richter D, Petry W, Buchenau U (1988) J Phys Condensed Matter 70:73CrossRefGoogle Scholar
  6. 6.
    Mezei F, Knaak W, Farago B (1987) Phys Rev Lett 58:571CrossRefGoogle Scholar
  7. 7.
    Floudas G, Higgins JS, Fytas G (1992) J Chem Phys 96:7672CrossRefGoogle Scholar
  8. 8.
    Götze W, private communicationGoogle Scholar
  9. 9.
    Buchenau U, Zorn R (1992) Europhys Lett 18:523CrossRefGoogle Scholar
  10. 10.
    Floudas G, Huggins JS, Kremer F, Fischer EW (1992) Macromolecules, in pressGoogle Scholar

Copyright information

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

Authors and Affiliations

  • G. Floudas
    • 3
    • 1
  • J. S. Higgins
    • 1
  • A. Burgess
    • 2
  1. 1.Dept. of Chem. Eng.Imperial CollegeLondonUK
  2. 2.ICI, RuncornLiverpoolUK
  3. 3.Max-Planck-Institut für PolymerforschungMainzFRG

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