Thermoelasticity, Chain Conformation, and the Equation of State for Rubber Networks

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Abstract
A new semiempiricalequation of state for rubberelasticity is proposed which postulates a volume dependence of the front factor due to intermolecular forces. The thermoelastic consequences of this equation are presented and compared with experiment. The theory is couched in terms of a single parameter which is readily obtainable from experiment. If this parameter is zero, the new equation reduces to previous equations. Experimental data on hand suggest that the parameter is not zero. If this result is confirmed, it would indicate that present equations relating thermoelastic experiments to chain conformation in free space or in solution must be reconsidered.

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