The change of the flocculating agent which causes the flocculation performance to decrease under bad conditions is generally called degradation, which is manifested by a decrease in molecular weight, a decrease in solution viscosity, a deterioration in flocculation performance or even failure. There are many factors that may have this effect. In this regard, high molecular weight pam is a fairly "squeaky" substance. Moreover, the higher the molecular weight of the pam, the easier it is to produce these changes and the more sensitive it is to the relevant factors.
This problem must be taken very seriously, otherwise good flocculants will not achieve good results. Modern polyacrylamide products have a high molecular weight, which is the basis for their good flocculation properties. However, the macromolecule of this flocculant is easily damaged by external factors, which greatly degrades its performance. The preparation and use of flocculants must be carefully prevented from occurring.