Abstract
Model networks of the polyurethane-type were prepared by end-linking hydroxyl-terminated poly(ε-caprolactone) chains with an aromatic triisocyanate. The chains had number-average molecular weights Mn in the range 570—1950g mol−1, and the reactions were carried out in the undiluted state. The trifunctional networks thus obtained were studied with regard to their stress-strain isotherms in both the unswollen and swollen states, in elongation at 25°C. Values of the high deformation modulus fell between the limits predicted for the non-affine deformation of a “phantom” network and the affine deformation of a network in which the cross-links are firmly embedded in their surroundings. As expected, the values of the low deformation modulus were much closer to the affine limit.
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Sung, PH., Mark, J. Model Elastomeric Networks Prepared from Poly(caprolactone). Polym J 12, 835–839 (1980). https://doi.org/10.1295/polymj.12.835
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DOI: https://doi.org/10.1295/polymj.12.835