Preparation and Characterization of Polyethylene-Oxide (PEO) Solution
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For years, it has been known that the addition of a small amounts of polymers, or other materials, to water or other liquids can help reduce the skin friction of a general liquid when flowing past a solid surface, known as drag reduction. When mixing these materials with water, it is important that all samples are as consistent as possible. The current work seeks to identify a robust method of preparation that results in consistent and accurate batches of polymer solution at a desired concentration. A set of preparation procedures is described, and characterization of these batches will be based upon molecular weight, viscosity, and other polymer parameters. The molecular weight is characterized using a pressure drop apparatus, and viscosity is characterized using a rheometer. Additionally, this work will briefly focus on items of avoidance during preparation. The solutions prepared with the method described herein showed consistent measurements for molecular weight for concentrations of 10 ppm and 15 ppm. A batch with a concentration of 1000 ppm is shown to have a high repeatability during viscosity tests. Based on these results, the method of preparation described successfully produces polymer solutions with consistent characteristics at a desired concentration.
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