Study of drag reduction due to aqueous sodium polyacrylate by the rolling ball method.
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概要
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A new apparatus was constructed by modifying the rolling ball viscometer in order to study drag reduction due to polymer solutions. Using this apparatus, dilute aqueous solutions of sodium polyacrylate (200 ppm) containing various amounts of KNO<SUB>3</SUB> were examined at 25°C in the region of the Reynolds number where drag reduction begins to appear. The drag coefficient and Reynolds number were calculated using the equations proposed by Hubbard and Brown. It was found that drag reduction is markedly affected by the concentration of added KNO<SUB>3</SUB> and that the maximum effect appears at 5.00×10<SUP>−3</SUP> moll<SUP>−1</SUP> of KNO<SUB>3</SUB>. This finding may be favorably explained by Kohn's energy storage theory.
- 社団法人 高分子学会の論文
社団法人 高分子学会 | 論文
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