A comparison of rheology, dielectric response, and calorimetry within indane-based glass-formers

Brian M. Erwin, Kevin A. Masser, Ralph H. Colby

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report dynamics data on a family of indane glass-forming liquids. Although structural variations make the glass transition vary over a 77 K range, the fragility and width of the relaxation time distribution from oscillatory shear measurements are quite similar for all 14 indanes studied. In contrast, the measured width of the primary relaxation time distribution from dielectric measurements varies considerably for different indanes. The temperature dependence of relaxation time can be described using either Vogel-Fulcher or dynamic scaling, but only the latter allows both mechanical and dielectric data sets to have the same divergence temperature. The consequences of this observation for the thermodynamic significance of such a divergence temperature are discussed.

Original languageEnglish (US)
Pages (from-to)4776-4784
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume352
Issue number42-49 SPEC. ISS.
DOIs
StatePublished - Nov 15 2006

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Calorimetry
Rheology
rheology
Relaxation time
heat measurement
relaxation time
Glass
glass
divergence
Temperature
Glass transition
Thermodynamics
shear
scaling
thermodynamics
temperature dependence
temperature
Liquids
liquids

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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abstract = "We report dynamics data on a family of indane glass-forming liquids. Although structural variations make the glass transition vary over a 77 K range, the fragility and width of the relaxation time distribution from oscillatory shear measurements are quite similar for all 14 indanes studied. In contrast, the measured width of the primary relaxation time distribution from dielectric measurements varies considerably for different indanes. The temperature dependence of relaxation time can be described using either Vogel-Fulcher or dynamic scaling, but only the latter allows both mechanical and dielectric data sets to have the same divergence temperature. The consequences of this observation for the thermodynamic significance of such a divergence temperature are discussed.",
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A comparison of rheology, dielectric response, and calorimetry within indane-based glass-formers. / Erwin, Brian M.; Masser, Kevin A.; Colby, Ralph H.

In: Journal of Non-Crystalline Solids, Vol. 352, No. 42-49 SPEC. ISS., 15.11.2006, p. 4776-4784.

Research output: Contribution to journalArticle

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AB - We report dynamics data on a family of indane glass-forming liquids. Although structural variations make the glass transition vary over a 77 K range, the fragility and width of the relaxation time distribution from oscillatory shear measurements are quite similar for all 14 indanes studied. In contrast, the measured width of the primary relaxation time distribution from dielectric measurements varies considerably for different indanes. The temperature dependence of relaxation time can be described using either Vogel-Fulcher or dynamic scaling, but only the latter allows both mechanical and dielectric data sets to have the same divergence temperature. The consequences of this observation for the thermodynamic significance of such a divergence temperature are discussed.

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