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Abstract (1) A method for measuring the dynamic visco-elasticity of liquid by the torsional oscillation is described. (2) The visco-elastic oils produced by the thermal polymerization of linseed oil to various, degrees were studied by this rheometer. (3) The amplitude effect of the dynamic properties was negligible ; so that these materials are supposed to be linear in their visco-elastic behavior. (4) The dynamic visco-elasticity of these oils was measured in the very low frequency region (period : 10 seconds-5 minutes). (5) The temperature dependence of the dynamic viscosity was discussed. (6) Weissenberg effect of these oils was tested in a qualitative way.
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Nakagawa et al. (1956) studied this question.
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