Modified ubbelohde viscosimeter

摘要

A Ubbelohde viscosimeter is disclosed which is modified according to the present invention by mounting to its reservoir a pressure tube and to the upper ends of the pressure tube and the conventional capillary tube a double three way cock. The cock controls pressure supply to the reservoir, as well as selectively connecting the reservoir to atmosphere. In addition a separate suction tube is provided in association with the reservoir to permit selective withdrawal of material from the reservoir. By this arrangement viscosity measurements of polymer solutions at high temperatures are possible without removing the viscosimeter from the thermostat for cleaning.