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Capillary Rheology (1 Temperature)

Test ID  

This test determines viscosity-shear rate behavior of a material at a particular test temperature. The sample, dried if needed, is loaded into a preheated test barrel of a capillary rheometer. A range of flow rates is used, attempting to cover a shear rate range of 10-10,000 /s. Pressure drop across the die is measured for each flow rate, and viscosity-shear rate data are calculated. Weissenberg-Rabinowitsch corrections are performed.    
Pressure can also be made using a load cell instead of a pressure transducer.  
ASTM D3835  
ISO 11443  
Data see sample data  
Apparent Viscosity v. shear rate data are reported for each test temperature. This data appears in Matereality as Capillary Viscosity.  
Replicates (# of times this test is repeated)  
0.5 - kg of pellets [details]


This test provides a fundamental measure of the flow characteristics of a plastic. Data can describe the dependency of viscosity on shear rate. Tests at multiple temperatures yield temperature dependency of viscosity.