Method for determining molecular weight of polyacrylamide

Polyacrylamide molecular weight determination method Recently, a friend asked me how to determine the molecular weight of the flocculant polyacrylamide? For this problem, we first look at the relationship between the viscosity and molecular weight of polyacrylamide. Polyacrylamide solution is very viscous. Generally, the higher the molecular weight of polyacrylamide, the higher the viscosity of the solution. This is because polyacrylamide is large. Molecules are thin, long chain-like bodies that have a high resistance to movement in solution. The essence of viscosity is the amount of friction in the solution, also known as the internal friction coefficient. The solution of various high molecular organic compounds has a high viscosity and increases with an increase in molecular weight. One method for determining the molecular weight of a polymer organic substance is to measure the viscosity of a certain concentration of the solution under certain conditions, and then calculate the molecular weight according to a certain formula, which is called the estimated molecular weight.
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