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The Shear Modulus of Vit 1 in the Supercooled Liquid and Glassy State

Published online by Cambridge University Press:  17 March 2011

Alijeet S. Bains
Affiliation:
Physics Department, University of Illinois, Urbana, IL, U.S.A.
Craig A. Gordon
Affiliation:
Physics Department, University of Illinois, Urbana, IL, U.S.A.
Andrew V. Granato
Affiliation:
Physics Department, University of Illinois, Urbana, IL, U.S.A.
Alexander B. Lebedev
Affiliation:
Ioffe Physico-Technical Institute, St. Petersburg, Russia
Marissa A. LaMadrid
Affiliation:
Department of Molecular Biology, University of Washington, Seattle, WA, U.S.A.
William L. Johnson
Affiliation:
Department of Materials Science and Engineering, California Institute of Technology, Pasadena, CA, U.S.A.
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Abstract

Using a non-contact electromagnetic-acoustic transformation (EMAT) technique, we have measured the temperature dependence of the infinite frequency shear modulus of Vit 1 at constant heating rate in the glassy and supercooled liquid states. Values of the shear softening fragility parameter -dln(G/Gg/d(T/Tg) are compared with those obtainable from specific heat and viscosity measurements, using the interstitialcy theory of condensed matter states. There is overall agreement found between these independently measured values.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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