Measuring Bulk Modulus With A Densitometer

摘要

Measuring extensional properties is difficult. However, extensional properties arernimportant in many material processing techniques, such as extrusion and film blowing. In thisrnwork, we examine a new technique that relates bulk modulus to density and the sound velocity ofrnthe material. We will present results on Newtonian and viscoelastic liquids. These data arerncompared to results obtained on a shear rheometer and on data obtained by other workers usingrnextensional rheometers.