Description: A solution of polyacrylamide in glycerin climbs a vertical rapidly rotating rod (in other word, forms a negative vortex) placed in the solution, whereas a normal liquid will form a depression ( a positive vortex) around the rod.

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Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry

Year or vol: 3 page: 335

Keywords: Solutions, Polyacrylamide, Rod-climbing Liquid, Polymers