Abstract
Measurements have been made of the viscosity, density, and shear mechanical resistance of eugenol. The relaxational behaviour is described in terms of the complex shear compliance J*(jω)=J∞+ 1/jωη+Jr/(1 + jωτr)β with the parameters Jr/J∞= 1.0, ηJ∞/τr= 2.0 and β= 0.5. The corresponding spectrum of relaxation times contains a single relaxation time together with a separate continuous distribution of relaxation times. It is shown that the existence of a single relaxation time in the spectrum is a general feature of the relaxation spectrum for this form of equation. For eugenol, the single relaxation time, τt, is found to be 4.28τr. The fractional contribution to the viscosity, ηt/η, and the relaxable shear modulus, Gt/G∞, due only to the single relaxation process are 93 % and 43 % respectively.
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