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Toward broadband mechanical spectroscopy
Hecksher, T Torchinsky, DH Klieber, C Johnson, JA Dyre, JC Nelson, KA
Hecksher, T
Torchinsky, DH
Klieber, C
Johnson, JA
Dyre, JC
Nelson, KA
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Journal Article
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2017-08-15
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10.1073/pnas.1707251114
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© 2017, National Academy of Sciences. All rights reserved. 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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Proceedings of the National Academy of Sciences of the United States of America
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