Abstract
Cover: Extensional rheological properties determine the flow behavior of polymer solutions through porous media. The biopolymer schizophyllan, which experiences such flows in enhanced oil recovery operations, shows drastic changes in its conformational structure depending on the nature of the solvent. As a result, the extensional relaxation time is found to exhibit a strong change in scaling with concentration for solutions in water (in which a triple-helical structure is reported), compared to solutions in DMSO with a random coil structure. Further details can be found in the article by R. De Dier, W. Mathues, and C. Clasen* on page 944.
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