Rheovibron dynamic viscometer

Rheovibron (dynamic) viscometer is widely used for measurements of dynamic mechanical properties such as loss modulus, storage modulus, and dissipation factor, each as a function of temperature. In this instrument, the test specimen is clamped between strain gauges and subjected to low order of sinusoidal strain at a specified frequency. The value of tan d is directly read and the storage and loss moduli are calculated using sample dimensions and instrument readings. 

The compatibility of the polymers in solutions was determined by dynamic viscosity measurements using a rotational viscometer at 293 K and shear rate 1312 s. The morphology of the film cast from a solution was examined with a polarization-interference microscope by differential method, at magnification of 250x. Dynamic mechanical measurements were made using direct reading visco-elastometer, the Rheovibron. The temperature was scanned... 

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