The Rheological Properties of Polyacrylamide Solutions in Shear and Extension
As part of an EEC Science Stimulation programme on extensional viscosity, two major conferences were organised on the subject. The second of these  was devoted to the results obtained on a standard fluid, Ml. The data obtained in shear flow was remarkably consistent from laboratory to laboratory. Extensional flow results presented quite a different picture. Using a series of nonequilibrium techniques such as the spinline rheometer, opposing jet, falling drop and converging flow, extensional viscosity results were obtained which differed by as much as 2 to 3 orders of magnitude. Nevertheless, it was apparent that consistency did exist within similar techniques. It is in the context of this information that the measurements described below have been made.
KeywordsRheological Property Shear Flow Fluid Mechanics Carboxylic Acid Group Elsevier Science Publisher
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