Further Considerations on the Theory of Intermolecular Obstruction in Rubber Elasticity

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Abstract
An earlier theory which took into account intermolecular obstruction in rubber is reconsidered. On the basis of a revised procedure for counting configurations of polymer chains, a new equation of state is obtained relating stress to strain in uniaxial extension. The new relationship has the same from as a function of the strain but differs in its dependence on f, the fraction of the rubber volume occupied by the polymer chains. When applied to experiments, it leads to higher values of f. In addition, results presented previously only for uniaxial extension are generalized for arbitrary strains.

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