The influence of molecular weight distribution on polymer drag reduction was studied for solutions of partially hydrolyzed polyacrylamide by analyzing the solution over a period of time during which the polymer was degrading. No relation was observed between the effectiveness of this polymer solution and molecular weight.
Relation of Polymer Drag Reduction to Structure and Molecular Weight (Keynote)
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Vlachogiannis, M, Liberatore, M, McHugh, AJ, & Hanratty, TJ. "Relation of Polymer Drag Reduction to Structure and Molecular Weight (Keynote)." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 1: Fora, Parts A, B, C, and D. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 751-752. ASME. https://doi.org/10.1115/FEDSM2003-45657
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