27
2023
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09
The effect of hydrolysis time on the viscosity of polyacrylamide
Source:
The viscosity of polyacrylamide solution changes with the extension of hydrolysis time. Short hydrolysis time results in lower viscosity, which may be due to the fact that the polymer has not yet formed a network structure; The hydrolysis time is too long and the viscosity decreases, which is caused by the structural loosening of polyacrylamide in solution. Partially hydrolyzed polyacrylamide dissociates into negatively charged macromolecules after dissolving in water. The electrostatic repulsion between molecules and the anionic repulsion between different chains on the same molecule cause the molecules to stretch in the solution and entangle with each other. This is why partially hydrolyzed polyacrylamide can significantly increase the viscosity of its solution.
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