Thermomechanical heat of deformation studies on cis-polybutadiene |
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Authors: | C Price G Allen N Yoshimura |
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Affiliation: | Department of Chemistry, University of Manchester, Manchester M13 9PL, UK |
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Abstract: | Thermomechanical heat of torsional deformation measurements have been made on crosslinked cis-polybutadiene by means of a Calvet microcalorimeter operated at 30°C. When corrected for volume changes utilizing the Gaussian statistical theory of elasticity, the data gave a value for the relative energy contribution to the torsional couple, , of 0.14 ± 0.02. Measurements were also made on a sample subjected to simple tensile deformations. The relative energy contribution to the tensile force () was found to agree within experimental error with the value obtained for , and the two results gave an average value for din of 4.1 × 10?4 K?1. |
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