Connection between fragility, mean-squared displacement and shear modulus in two van der Waals bonded glass-forming liquids

Henriette Wase Hansen, Bernhard Frick, Tina Hecksher, Jeppe C. Dyre, Kristine Niss

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

The temperature dependence of the high-frequency shear modulus measured in the kHz range is compared with the mean-squared displacement measured in the nanosecond range for the two van der Waals bonded glass-forming liquids cumene and 5-polyphenyl ether. This provides an experimental test for the assumption
connecting two versions of the shoving model for the non-Arrhenius temperature dependence of the relaxation time in glass formers. The two versions of the model are also tested directly and both are shown to work well for these liquids.
OriginalsprogEngelsk
Artikelnummer104202
TidsskriftPhysical Review B (Condensed Matter and Materials Physics)
Vol/bind95
Udgave nummer10
ISSN1098-0121
DOI
StatusUdgivet - 10 mar. 2017

Emneord

  • Viscoelasticity
  • Glass transition
  • Liquids
  • Rheology techniques
  • Neutron scattering

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