Abstract
It was suggested that existence of compression delay influences a traction performance in high-pressure and high-shear condition. However measurement of volumetric viscosity has not been conducted in such condition. New dilatometry measurement with two plungers is developed for volumetric viscosity. By use of this dilatometry measurement volumetric viscosity under high-pressure (0.4-0.8GPa) is obtained. Variation of volumetric viscosity with pressure indicates the same tendency to that of shear viscosity. In the pressure range 0.4-0.8GPa compression delay exists and then influences the traction.
