Powder Shear Cell: How to Characterize the Response of a Polymer Powder (PEG) to Thermal and Hygrometric Conditions

Relevant for: Polymer Production, PEG, Powder Storage, Cohesion, Angle of Internal Friction, Flowability, Powder Flow, Powder Rheology

The processing, handling and storage of powders on an industrial scale are subject to various problematic effects. Changes in relative humidity and temperature can have a strong impact on the powder behavior. Food product, chemicals or drug products are especially concerned by these issues, with the possibility of a major impact on processability and quality. In this report the sensitivity of a PEG polymer towards thermal or hygrometric changes is characterized. The mechanical parameters extracted from the shear cell – cohesion, flow function, angle of internal friction– are shown to describe well the changes in powder behavior.

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