QUASI-STATIC MEASUREMENTS OF THE FREQUENCY-DEPENDENT BULK AND SHEAR MODULUS OF SUPERCOOLED LIQUIDS

By using two newly developed experimental methods, the adiabatic bulk modulus, K-s, and the shear modulus, G, of 1,2,6-hexanetriol have been measured. In the frequency range 15 Hz-15 kHz and temperature range 2 02-230 K-s the glass transition appears as a frequency dependence of K -s and G. It is found that G and the relaxational part, K-r, of K-s ha ve an identical frequency dependence, while the ratio of the loss peak frequencies of G relative to K-r is 1.8.