Abstract
A stiffened and automated Weissenberg Rheogoniometer has been used to obtain steady-state and transient stress data on a 12 wt.% polystyrene solution. While the results agree generally with those previously reported on the same solution, the present data-acquisition system provides a more accurate recording of short-time responses. Stress growth and relaxation data were compared with the responses predicted for a finite linear viscoelastic fluid with the same relaxation time spectrum as the test solution. Simple generalizations based on such a comparison have been sought.
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