Rubber elasticity in the range of small uniaxial tensions and compressions. Results for poly(dimethylsiloxane)
- 1 June 1978
- journal article
- research article
- Published by Wiley in Journal of Polymer Science: Polymer Physics Edition
- Vol. 16 (6) , 1115-1121
- https://doi.org/10.1002/pol.1978.180160616
Abstract
Results of uniaxial tension and compression experiments are reported on crosslinked polydimethylsiloxane (PDMS) networks in the unswollen state over the range 0.5 < α−1 < 1.2 where α is the extension ratio. Curves representing the reduced force [f] = f(V0/V)1/3(α – α−2)−1 plotted against α−1 can be approximated by straight lines for 0.5 < α−1 < 0.9, in agreement with the phenomenological Mooney equation. As α−1 approaches 1, however, they tend to level off and continue into the α−1 > 1 region with decreasing slope. These results are in agreement with the predictions of recent elasticity theories that incorporate the effect of junction‐chain entanglements in the elastic free energy.Keywords
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