Evaluation of the Polymer-Polymer Interaction Parameter from the Equation of State Thermodynamic Theory

1979 ◽  
pp. 599-607 ◽  
Author(s):  
RYONG-JOON ROE
Keyword(s):  
Equation Of State ◽  
Interaction Parameter ◽  
Thermodynamic Theory ◽  
Polymer Interaction

Comparison of the values of the interaction parameter ξ from upper critical solution temperatures of acetone + alkanes with values obtained from gas-liquid critical temperatures

1977 ◽  
Vol 30 (4) ◽  
pp. 767 ◽  
Author(s):  
LS Toczylkin ◽  
CL Young
Keyword(s):  
Equation Of State ◽  
Interaction Parameter ◽  
Fluid Model ◽  
Van Der Waals ◽  
Critical Temperatures ◽  
Acetone Hexane ◽  
Critical Solution Temperatures

The upper critical solution temperatures, UCST , of acetone + alkane (n- C5H12 to n-C17H36) and acetone + hexane isomers have been measured. These results are used to calculate an interaction parameter ξ by using the van der Waals one-fluid model together with the Guggenheim equation of state. Values of ξ are compared with those obtained from the gas-liquid critical temperatures. The gas-liquid critical temperatures for the n- alkane + acetone systems were taken from the literature whereas those for the hexane isomers + acetone were measured in this work. The values of ξ calculated from gas-liquid critical temperatures are slightly greater than those calculated from the UCST as has been observed previously for other systems.

Interaction Parameters and Heats of Dilution for Ethylene Propylene Rubber in Various Solvents

1966 ◽  
Vol 39 (5) ◽  
pp. 1451-1459 ◽  
Author(s):  
Earl D. Holly
Keyword(s):  
Interaction Parameter ◽  
Polymer Concentration ◽  
Interaction Parameters ◽  
Temperature Dependent ◽  
Heat Of Dilution ◽  
Ethylene Propylene ◽  
Thermodynamic Criterion ◽  
Heats Of Dilution ◽  
Ethylene Propylene Rubber ◽  
Polymer Interaction

Abstract Crosslinked ethylene propylene rubber gels were swollen in five solvents at 25–100° C. The solvent polymer interaction parameter μ for each system was determined as a function of temperature and polymer concentration. A thermodynamic criterion of the sign of the heat of dilution, ΔH1, was pointed out. For three of the systems ΔH1 was negative. The entropy contribution to the interaction parameter was found to be smaller than usual for systems having a temperature-dependent heat of dilution. The heats of dilution and the entropy terms may be consistently interpreted in terms of Prigogine's theory of solutions.

Polymer-polymer interaction parameter determined by inverse gas chromatography

Polymer ◽  
1987 ◽  
Vol 28 (13) ◽  
pp. 2329-2334 ◽  
Author(s):  
O.S. Tyagi ◽  
S.M. Sajjad ◽  
Sajid Husain
Keyword(s):  
Gas Chromatography ◽  
Interaction Parameter ◽  
Inverse Gas Chromatography ◽  
Polymer Interaction
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