In a capillary rheometer, shear is generated by a pressure difference over a closed channel. Gravity, compressed gas or a piston are used to generate pressure on the test fluid. The pressure drop and flow rate through a capillary tube are used to determine the fluid's viscosity and other rheological properties.
Some of Arkema Analytical Solutions' specialized capillary rheometry capabilities include:
- Various die geometries
- Sub-ambient temperature testing
- Rheotens attachment for determination of polymer melt strength and extensional viscosity
- Dynamic die swell measurement
- PVT attachment for determination of specific volume as a function of temperature and pressure