Connection between slow and fast dynamics of molecular liquids around the glass transition
Journal Article
·
· Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)
- Laboratoire de Chimie Physique, Batiment 349, Universite Paris-Sud, F-91405 Orsay (France)
- Institut Laue-Langevin, F-38042 Grenoble (France)
- DNRF Centre 'Glass and Time', IMFUFA, Department of Sciences, Roskilde University, Postbox 260, DK-4000 Roskilde (Denmark)
The mean-square displacement (MSD) was measured by neutron scattering at various temperatures and pressures for a number of molecular glass-forming liquids. The MSD is invariant along the glass-transition line at the pressure studied, thus establishing an 'intrinsic' Lindemann criterion for any given liquid. A one-to-one connection between the MSD's temperature dependence and the liquid's fragility is found when the MSD is evaluated on a time scale of {approx}4 ns, but does not hold when the MSD is evaluated at shorter times. The findings are discussed in terms of the elastic model and the role of relaxations, and the correlations between slow and fast dynamics are addressed.
- OSTI ID:
- 21464479
- Journal Information:
- Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevE.82.021508; (c) 2010 The American Physical Society; ISSN 1539-3755
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental test of a predicted dynamics–structure–thermodynamics connection in molecularly complex glass-forming liquids
Is There a Connection Between Fragility of Glass Gorming Systems and Dynamic Heterogeneity/Cooperativity?
Is there a connection between fragility of glass forming systems and dynamic heterogeneity/cooperativity?
Journal Article
·
Wed Apr 28 00:00:00 EDT 2021
· Proceedings of the National Academy of Sciences of the United States of America
·
OSTI ID:21464479
Is There a Connection Between Fragility of Glass Gorming Systems and Dynamic Heterogeneity/Cooperativity?
Journal Article
·
Sat Jan 01 00:00:00 EST 2011
· Journal of Non-Crystalline Solids
·
OSTI ID:21464479
Is there a connection between fragility of glass forming systems and dynamic heterogeneity/cooperativity?
Journal Article
·
Sat Jan 01 00:00:00 EST 2011
· Journal of Non-Crystalline Solids
·
OSTI ID:21464479