Capillary Rheometry

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's 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