Relationship between Gough-Joule Coefficients and Moduli of Vulcanized Rubbers
- 1 June 1949
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 20 (6), 526-531
- https://doi.org/10.1063/1.1698420
Abstract
The Gough‐Joule coefficients (a) at constant stress and (b) at constant strain are defined and methods of measurement of each on vulcanized rubbers are given. It is shown mathematically and experimentally that the ratio of (b) to (a) is equal to the ``tangent'' modulus. The quotient of the Gough‐Joule coefficient at constant stress divided by the stress and the quotient of the Gough‐Joule coefficient at constant strain divided by the strain are shown to be constants which are independent of the stress‐strain‐temperature conditions of the test. Experimental data are given for stocks based on Hevea, GR‐S, Neoprene GN, Butyl Rubber, and Butaprene.Keywords
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