Method for testing influence of shear speed on apparent viscosity of hydrophobic association polymer

Abstract

The invention discloses a method for testing the influence of the shear speed on the apparent viscosity of a hydrophobic association polymer. The method comprises the following steps: 1, preparing the hydrophobic association polymer; 2, dissolving the hydrophobic association polymer in a solvent to form solutions having a same mass concentration; 3, respectively placing the hydrophobic association polymer solutions in different experiment containers; 4, respectively placing the experiment containers in water baths having a same temperature; and 5, measuring the apparent viscosity of the hydrophobic association polymer under different shear speeds through a viscometer, and analyzing data to obtain the influence of the shear speed on the apparent viscosity of the hydrophobic association polymer. The method can be successfully applied to test the influence of the shear speed on the apparent viscosity of the hydrophobic association polymer, and has the advantages of accurate test result, simple test steps, and substantial reduction of the test cost.

Description

technical field [0001] The invention relates to a test method for the influence of shear speed on the apparent viscosity of hydrophobically associated polymers. Background technique [0002] Hydrophobic association polymer refers to a water-soluble polymer with a small amount of hydrophobic groups on the hydrophilic macromolecular chain of the polymer. A small amount of hydrophobic groups are introduced into the water-soluble macromolecular chain to make its aqueous solution exhibit unique rheological properties. Above a certain polymer concentration, the hydrophobic parts associate to form a dynamic three-dimensional network structure, thereby forming a large supramolecular chain aggregate, increasing the hydrodynamic volume of the polymer, and significantly increasing the viscosity of the solution. The addition of small molecule electrolytes can increase the polarity of the solvent, enhance the hydrophobic association, and produce obvious calcium chloride resistance. Und...

AI Technical Summary

Problems solved by technology

The hydrophobic part of the hydrophobic association polymer molecule is composed of non-polar groups, and there is only van der Waals attraction between them and water molecules, which is much weaker than the interaction hydrogen bond between water molecules, so it cannot effectively replace the interaction with water molecules. Water molecules interact with each other through hydrogen bonds

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