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Common Melt Rheometer Techniques

Capillary Dies in Capillary Rheometer Azadeh Farahanchi, Rheological Scientist, Ph.D 05.21.2018 Capillary rheometer is one the most common melt rheometer techniques to understand flow behavior and rheological properties of polymer materials under typical processing condition. In this test method, the molten polymer sample is forced to flow through an interchangeable capillary die by means of […]

What is the Rheological Significance of the Entrance Pressure Drop?

Extensional Viscosity – Rheological Significance of the Entrance Pressure Drop Azadeh Farahanchi, Rheological Scientist, Ph.D   Extensional/elongational viscosity measurements (melt strength) are of rheological importance in any  plastic stretching process for example blow molding, sheet extrusion, blown film extrusion, fiber spinning, etc. as the plastic is constantly stretching or expanding in such processes. Two polymers […]

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