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What are the advantages and disadvantages of constant speed - capillary viscometer in polymer rheology?
Wiki User
∙ 11y ago
Polymers tend to be quite viscous so measurements using a capillary viscometer can be quite slow. The second issue is both an advantage and disadvantage: many polymers have viscosity which vary with shear forces, in other words the viscosity changes with flow speed. A single speed is not sufficient to determine the viscosity behavior of the polymer. On the other hand, you can control the speed so with multiple measurements you can build up the viscosity profile quite nicely.
Wiki User
∙ 11y ago
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