Direct Test of Supercooled Liquid Scaling Relations

Abstract

Diverse material classes exhibit practically identical behavior when made viscous upon cooling toward the glass transition, suggesting a common theoretical basis. The first-principles scaling laws that have been proposed to describe the evolution with temperature have yet to be appropriately tested due to the extraordinary range of time scales involved. We used seven different measurement methods to determine the structural 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. For the material studied, our results comprise a comprehensive validation of the two scaling relations that are central to the fundamental question of whether supercooled liquid dynamics can be described universally. The ultrabroadband mechanical measurements demonstrated have fundamental and practical applications in polymer science, geophysics, multifunctional materials, and other areas.

arXiv comment7 pages, 6 figures, Supplementary: 16 pages, 20 figures

References in corpus (8)

• Theoretical perspective on the glass transition and amorphous materials
• Crossover to Potential Energy Landscape Dominated Dynamics in a Model Glass-forming Liquid
• Time-temperature superposition in viscous liquids
• Approximate square-root-time relaxation in glass-forming liquids
• Prevalence of approximate square root t relaxation for the dielectric alpha process in viscous organic liquids
• Dynamical Exchanges in Facilitated Models of Supercooled liquids
• Solidity of viscous liquids. IV. Density fluctuations
• $\alpha$-Scale Decoupling of the Mechanical Relaxation and Diverging Shear Wave Propagation Lengthscale in Triphenylphosphite

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