Abstract
A 1 kbar fluid compressibility apparatus has been used to determine the bulk compressibility moduli of samples of some epoxy resin systems. Combination with recent data on Young's modulus of the same materials has produced some accurate values of Poisson's ratio.
The same quantities have been determined in the MHz range by ultrasonic pulsevelocity methods. They show good agreement with the static measurements. There is a small relaxation in the bulk modulus with an apparent activation energy of about 4 1/2 eV.
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References
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Smith, A., Wilkinson, S.J. & Reynolds, W.N. The elastic constants of some epoxy resins. J Mater Sci 9, 547–550 (1974). https://doi.org/10.1007/BF02387527
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DOI: https://doi.org/10.1007/BF02387527