Activation volume in superpressed glass-formers
Scientific Reports, ISSN: 2045-2322, Vol: 9, Issue: 1, Page: 13787
2019
- 13Citations
- 19Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Metrics Details
- Citations13
- Citation Indexes13
- 13
- CrossRef2
- Captures19
- Readers19
- 19
Article Description
In pressurized glass-forming systems, the apparent (changeable) activation volume V(P) is the key property governing the previtreous behavior of the structural relaxation time (τ) or viscosity (η), following the Super-Barus behavior: τ(P),η(P)∝exp(Va(P)/RT), T = const. It is usually assumed that V(P) = V(P), where V#(P)=RTdlnτ(P)/dP or V#(P)=RTdlnη(P)/dP. This report shows that V(P) ≪ V(P) for P → P, where P denotes the glass pressure, and the magnitude V(P) is coupled to the pressure steepness index (the apparent fragility). V(P) and V(P) coincides only for the basic Barus dynamics, where V(P) = V = const in the given pressure domain, or for P → 0. The simple and non-biased way of determining V(P) and the relation for its parameterization are proposed. The derived relation resembles Murnaghan - O’Connel equation, applied in deep Earth studies. It also offers a possibility of estimating the pressure and volume at the absolute stability limit. The application of the methodology is shown for diisobutyl phthalate (DIIP, low-molecular-weight liquid), isooctyloxycyanobiphenyl (8*OCB, liquid crystal) and bisphenol A/epichlorohydrin (EPON 828, epoxy resin), respectively.
Bibliographic Details
Springer Science and Business Media LLC
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