The invention relates to a device and a method for measuring steady-state
extrusion viscous dissipation of a micro-scale
polymer fused
mass. The device and the method are characterized in that on the basis of a
capillary rheometer with two material barrels, a temperature sensor is arranged at an outlet of a neck ring mold of a capillary tube in the material
barrel through a fixing device, the outlet of the neck ring mold of the capillary tube is aligned with a measuring part of the temperature sensor, and the distance between the neck ring mold of the capillary tube and the sensor is adjusted by additionally mounting a spacer; and the other temperature sensor is arranged at the outlet of the other material
barrel through the fixing device for the convenience of measuring the temperature of the fused
mass simultaneously by the two sensors. The flow parameters of the fused
mass are set on the
rheometer, the fused mass flows out of the neck ring mold at certain shearing rate through by the
extrusion action of a
plunger, and the sensors measure the temperature of the extruded fused mass directly. The
temperature difference of the two sensors is calculated out so that the temperature rise of the fused mass caused by the
viscous dissipation can be measured. The device and the method has the advantages and benefits that the
temperature control of the fused mass is constant, the temperature is measured accurately and quickly, the fixing device is easy to assemble and disassemble, the neck ring mold is convenient to replace, and the range of measuring the shearing rate is higherwider.