Polymer—Solvent Interaction Parameter and Creep of Ethylene—Propylene Rubber

1964 ◽  
Vol 37 (4) ◽  
pp. 894-903 ◽  
Author(s):  
T. J. Dudek ◽  
F. Bueche
Keyword(s):  
Energy Density ◽  
Interaction Parameter ◽  
Cohesive Energy ◽  
Tensile Creep ◽  
Solvent Interaction ◽  
Ethylene Propylene ◽  
Cohesive Energy Density ◽  
Creep Curves ◽  
Ethylene Propylene Rubber ◽  
Polymer Solvent

Abstract The polymer—solvent interaction parameter for an ethylene—propylene ter-polymer containing 53 mole-% ethylene was determined as a function of degree of crosslinking in n-heptane and benzene. A well characterized EPR gum vulcanizate was used to obtain the polymer-solvent interaction parameter in fourteen solvents, and the cohesive energy density of the terpolymer was evaluated. The composite tensile creep curves for gum and filled EPR vulcanizates were obtained and compared with SBR creep curves.

Estimation of the cohesive energy density of a polymer from critical opalescence measurements

1968 ◽  
Vol 46 (24) ◽  
pp. 3919-3921 ◽  
Author(s):  
J. M. G. Cowie
Keyword(s):  
Energy Density ◽  
Concentration Dependence ◽  
Interaction Parameter ◽  
Cohesive Energy ◽  
Cohesive Energy Density ◽  
A Value ◽  
Critical Opalescence ◽  
Entropy Parameter ◽  
Polymer Interaction ◽  
Good Agreement

It has been demonstrated recently by Koningsveld that the concentration dependence of the solvent–polymer interaction parameter cannot be neglected in certain systems. By considering this effect in the polystyrene–cyclohexane system it has been possible to calculate a value for the entropy parameter ψ. Estimation of the cohesive energy density (c.e.d.) of polystyrene using this corrected ψ gave a result in good agreement with values of the c.e.d. obtained from other sources.

Liquid Structure, Thermodynamics, and Mixing Behavior of Saturated Hydrocarbon Polymers. 1. Cohesive Energy Density and Internal Pressure

1998 ◽  
Vol 31 (20) ◽  
pp. 6991-6997 ◽  
Author(s):  
Janna K. Maranas ◽  
Maurizio Mondello ◽  
Gary S. Grest ◽  
Sanat K. Kumar ◽  
Pablo G. Debenedetti ◽  
...  
Keyword(s):  
Energy Density ◽  
Internal Pressure ◽  
Cohesive Energy ◽  
Saturated Hydrocarbon ◽  
Liquid Structure ◽  
Cohesive Energy Density ◽  
Mixing Behavior ◽  
Hydrocarbon Polymers
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