| Autor: |
Casalini R; Naval Research Laboratory, Chemistry Division, Washington, DC 20375-5342, USA., Ransom TC; Naval Research Laboratory, Chemistry Division, Washington, DC 20375-5342, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of chemical physics [J Chem Phys] 2019 Nov 21; Vol. 151 (19), pp. 194504. |
| DOI: |
10.1063/1.5123614 |
| Abstrakt: |
In this paper, we present an overview of results in the literature regarding the thermodynamical scaling of the dynamics of liquids and polymers as measured from high-pressure measurements. Specifically, we look at the scaling exponent γ and argue that it exhibits the limiting behavior γ → 4 in regimes for which molecular interactions are dominated by the repulsive part of the intermolecular potential. For repulsive potentials of the form U(r) ∝ r -n , γ has been found to be related to the exponent n via the relation γ = n/3. Therefore, this limiting behavior for γ would suggest that a large number of molecular systems may be described by a common repulsive potential U(r) ∝ r -n with n ≈ 12. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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