Free Volume and Its Relationship to the Temperature Effect on Zero Shear Melt Viscosity: A New Correlation

1976 ◽  
Vol 20 (1) ◽  
pp. 47-64 ◽  
Author(s):  
M. H. Litt
Keyword(s):  
Temperature Effect ◽  
Free Volume ◽  
Melt Viscosity ◽  
New Correlation

Free Volume Approach to Polystyrene Melt Viscosity

1958 ◽  
Vol 29 (10) ◽  
pp. 1395-1398 ◽  
Author(s):  
Malcolm L. Williams
Keyword(s):  
Free Volume ◽  
Melt Viscosity ◽  
Polystyrene Melt

Temperature effect on free volume of polymethylpentene studied by positron annihilation technique

2009 ◽  
Vol 6 (11) ◽  
pp. 2420-2422 ◽  
Author(s):  
E. E. Abdel-Hady ◽  
Hamdy F. M. Mohamed ◽  
M. R. M. El-Sharkawy
Keyword(s):  
Temperature Effect ◽  
Positron Annihilation ◽  
Free Volume

Normalized Ashurst-Hoover Scaling and a Comprehensive Viscosity Correlation for Compressed Liquids

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Scott Bair ◽  
Arno Laesecke
Keyword(s):  
Free Volume ◽  
Essential Requirement ◽  
New Correlation ◽  
Wide Acceptance ◽  
Viscosity Correlation ◽  
Low Shear Viscosity ◽  
Temperature And Pressure ◽  
Exponential Power ◽  
Volume Models ◽  
Low Shear

The recent move toward physics-based elastohydrodynamics promises to yield advances in the understanding of the mechanisms of friction and film generation that were not possible a few years ago. However, the accurate correlation of the low-shear viscosity with temperature and pressure is an essential requirement. The Ashurst-Hoover thermodynamic scaling, which has been useful for thermal elastohydrodynamic simulation, is normalized here in a manner that maps the viscosity of three widely different liquids onto a master Stickel curve. The master curve can be represented by a combination of two exponential power law terms. These may be seen as expressions of different molecular interaction mechanisms similar to the two free-volume models of Batschinski-Hildebrand and Doolittle, respectively. The new correlation promises to yield more reasonable extrapolations to extreme conditions of temperature and pressure than free-volume models, and it removes the singularity that has prevented wide acceptance of free-volume models in numerical simulations.

A theory for the temperature effect on the chain length dependence of the diffusivity of oligomers

Soft Matter ◽  
2020 ◽  
Vol 16 (17) ◽  
pp. 4283-4289
Author(s):  
Chi Pui Jeremy Wong ◽  
Phillip Choi
Keyword(s):  
Temperature Effect ◽  
Chain Length ◽  
Free Volume ◽  
Size Dependence ◽  
Free Volume Theory ◽  
Length Dependence

Temperature effect on the size dependence of the diffusivity of oligomers is explained by free volume theory.

Melt viscosity of nanocrystalline alloys in the model of free volume

2019 ◽  
Vol 790 ◽  
pp. 547-550 ◽  
Author(s):  
V. Tsepelev ◽  
Yu. Starodubtsev ◽  
V. Konashkov ◽  
K. Wu ◽  
R. Wang
Keyword(s):  
Free Volume ◽  
Nanocrystalline Alloys ◽  
Melt Viscosity

FREE VOLUME CHANGE OF METALLIC GLASSES STUDIED BY THERMAL EXPANSION MEASUREMENTS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-875-C8-877
Author(s):  
E. Girt ◽  
P. Tomić ◽  
A. Kuršumović ◽  
T. Mihać-Kosanović
Keyword(s):  
Thermal Expansion ◽  
Free Volume ◽  
Volume Change ◽  
Metallic Glasses
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