Toward broadband mechanical spectroscopy

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Abstract

Diverse material classes exhibit qualitatively similar behavior when made viscous upon cooling toward the glass transition, suggesting a common theoretical basis. We used seven different measurement methods to determine the mechanical relaxation kinetics of a prototype molecular glass former over a temporal range of 13 decades and over a temperature range spanning liquid to glassy states. The data conform to time–temperature superposition for the main (alpha) process and to a scaling relation of schematic mode-coupling theory. The broadband mechanical measurements demonstrated have fundamental and practical applications in polymer science, geophysics, multifunctional materials, and other areas.

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Hecksher, T., Torchinsky, D. H., Klieber, C., Johnson, J. A., Dyre, J. C., & Nelson, K. A. (2017). Toward broadband mechanical spectroscopy. Proceedings of the National Academy of Sciences of the United States of America, 114(33), 8710–8715. https://doi.org/10.1073/pnas.1707251114

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