ArticleProceedings of the National Academy of Sciences of the United States of America2019
Fast contribution to the activation energy of a glass-forming liquid.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Medium-density amorphous ice unveils shear rate as a new dimension in water's phase diagram.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Local vs. cooperative: Unraveling glass transition mechanisms with SEER.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Predicting nonlinear physical aging of glasses from equilibrium relaxation via the material time.Science advances · 2022Article
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Authors and funding
3 authors.
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Abstract
This paper presents physical-aging data for the silicone oil tetramethyl-tetraphenyl trisiloxane. The density and the high-frequency plateau shear modulus [Formula: see text] were monitored following temperature jumps starting from fully equilibrated conditions. Both quantities exhibit a fast change immediately after a temperature jump. Adopting the material-time formalism of Narayanaswamy, we determine from the dielectric loss at 0.178 Hz the time evolution of the aging-rate activation energy. The relative magnitude of the fast change of the activation energy differs from that of the density, but is identical to that of [Formula: see text] In fact, the activation energy is proportional to [Formula: see text] throughout the aging process, with minor deviations at the shortest times. This shows that for the silicone oil in question the dynamics are determined by [Formula: see text] in-as well as out of-equilibrium.
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