A free volume theory on the chain length dependence of the diffusivity of linear polymers

Soft Matter ◽  
2019 ◽  
Vol 15 (45) ◽  
pp. 9300-9309 ◽  
Author(s):  
Chi Pui Jeremy Wong ◽  
Phillip Choi
Keyword(s):  
Chain Length ◽  
Free Volume ◽  
Diffusion Coefficients ◽  
Linear Polymers ◽  
Free Volume Theory ◽  
Length Dependence

A free volume theory for the crossover in diffusion coefficients of linear polymers from unentangled to entangled regimes is developed.

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.

Predictive capabilities of a free-volume theory for solvent self-diffusion coefficients

1989 ◽  
Vol 27 (5) ◽  
pp. 1179-1184 ◽  
Author(s):  
J. S. Vrentas ◽  
C.-H. Chu ◽  
M.C. Drake ◽  
E. von Meerwall
Keyword(s):  
Free Volume ◽  
Diffusion Coefficients ◽  
Free Volume Theory ◽  
Self Diffusion

Binary Mutual Diffusion Coefficients of Polymer/Solvent Systems Using Compressible Regular Solutions Theory and Free Volume Theory

2016 ◽  
Vol 41 (3) ◽  
Author(s):  
Arsalan Farajnezhad ◽  
Orang Asef Afshar ◽  
Milad Asgarpour Khansary ◽  
Saeed Shirazian
Keyword(s):  
Free Volume ◽  
Diffusion Coefficients ◽  
Pure Component ◽  
Mutual Diffusion ◽  
Free Volume Theory ◽  
Chemical Thermodynamic ◽  
Fugacity Coefficients ◽  
Solvent Systems ◽  
Polymeric Solutions ◽  
Polymer Solvent

AbstractThe free volume theory has found practical application for prediction of diffusional behavior of polymer/solvent systems. In this paper, reviewing free volume theory, binary mutual diffusion coefficients in some polymer/solvent systems have been systematically presented through chemical thermodynamic modeling in terms of both activity coefficients and fugacity coefficients models. Here chemical thermodynamic model of compressible regular solution (CRS) was used for evaluation of diffusion coefficients calculations as the pure component properties would be required only. Four binary polymeric solutions of cyclohexane/polyisobutylene,

On the diffusivity of ring polymers

Soft Matter ◽  
2020 ◽  
Vol 16 (9) ◽  
pp. 2350-2362 ◽  
Author(s):  
Chi Pui Jeremy Wong ◽  
Phillip Choi
Keyword(s):  
Free Volume ◽  
Diffusion Coefficients ◽  
Free Volume Theory ◽  
Ring Polymers

The crossover in diffusion coefficients of ring polyethylene is explained by a free volume theory.

Parameters of the free volume theory in glasses with trigonal local coordination

2001 ◽  
Vol 10 (0) ◽  
pp. 147-151
Author(s):  
Т. М. Мельниченко ◽  
Т. Д. Мельниченко ◽  
Я. Я. Коцак ◽  
Я. П. Куценко ◽  
П. П. Пуга
Keyword(s):  
Free Volume ◽  
Free Volume Theory ◽  
Local Coordination

Development of a Method for the Prediction of Pressure-Viscosity Coefficients of Lubricating Oils Based on Free-Volume Theory

1989 ◽  
Vol 111 (1) ◽  
pp. 121-128 ◽  
Author(s):  
C. S. Wu ◽  
E. E. Klaus ◽  
J. L. Duda
Keyword(s):  
Free Volume ◽  
Good Accuracy ◽  
Temperature Relationship ◽  
Free Volume Theory ◽  
Simple Method ◽  
Lubricating Oils ◽  
Viscosity Coefficients ◽  
Data Points

A simple method based on free-volume theory to predict the pressure-viscosity coefficients of liquid lubricants has been developed. The method only requires the viscosity-temperature relationship and the viscosity at the temperature of interest. The method provides good accuracy when it was tested for 162 data points for various fluid types over wide ranges of temperature and viscosity.

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