Toward broadband mechanical spectroscopy.
basic_science · Level V
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- Record sourced from PubMed, PMID 28765374.
- Also identified by DOI 10.1073/pnas.1707251114 and PMC identifier 5565458.
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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.