ROTATIONAL ELASTOVISCOSIMETERS FOR STUDYING POLYMERIC SYSTEMS,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
Rotational viscosimeters of the cone-plane type are described wherein the material under investigation is placed in a gap between the working surfaces, i.e. a rotating plane and a stationary cone. Elastoviscosimeters of the cone-plane type are intended for such rheological investigations as the measurement of viscous and elastic properties of polymeric systems. The rotational viscometer REV-1 is described that is intended for studying highly viscous media, in the range from -30 to 300 degrees C, in air, in vacuum to about 0.001 mm Hg and in an inert gas. The material being investigated is loaded into the device in the form of cone-shaped tablets about 5g the error in measuring torque does not exceed 1 and in measuring viscosity, 4.5. The REV-1 may be modified to measure elasticity wherein the origination of stress is normal to the plane of displacement the modification uses 2 conical surfaces and permits lower rates of deformation than the coneplane system. The rotational elastoviscometer REV-2 operates similarly to the REV-1. The value of viscosity on these and other devices differed by no more than 6.