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Simple Determination of the Linear Viscoelastic Region of a Polymer Using a Rheometer

Materials such as polymers exhibit viscoelastic behavior which is directly related to molecular structure and formulation differences. To accurately evaluate the relationships between molecular structure and viscoelastic behavior requires that experiments, such as rheological measurements, be conducted in regions where the viscoelastic properties observed are independent of imposed stress or strain levels. That is, experiments must be conducted in the linear viscoelastic region.

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Setting up the Ring on Plate Geometry on the Discovery HR for Tribo-Rheometry Testing

Overview Interested in measuring surface friction? TA Instruments Discovery Hybrid Rheometer offers four different tribo-rheometry accessories. This one, the ring-on-plate geometry, offers a surface to surface contact to measure surface friction. Rheometer users in the cosmetics, personal care, food, and electronics industries commonly use surface friction measurements to optimize their products. Watch this tech tip…

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