Abstract
Thermoelastic (stress—temperature) measurements have been carried out on networks of cis-1,4-polybutadiene, trans-1,4-polybutadiene, and trans-1,4-polyisoprene under a variety of experimental conditions. Values of the temperature coefficient of the unperturbed dimensions of the network chains and the fraction fe/f of the total force which is of energetic origin were calculated from these data and were found to be independent of cross-linking conditions, presence of diluent in the network during the stress—temperature measurements and type of deformation employed. The present results are found to be in good agreement with other experimental results reported for these polymers and their interpretation in terms of rotational isomeric state theory provides insight into the origin of the temperature dependence of the unperturbed dimensions of these chain molecules.
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Becker, R., Yu, C. & Mark, J. Thermoelastic Studies of Diene Polymers in Elongation and Compression. Polym J 7, 234–240 (1975). https://doi.org/10.1295/polymj.7.234
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DOI: https://doi.org/10.1295/polymj.7.234