The industrial production of PAM has also been in existence for decades, and the production process has been continuously improved. At present, PAM products are mainly high, medium and low in terms of molecular weight, and the adjustability is between 104 and 107. Among them, low molecular weight products have higher requirements for each link in the production process.

The production of low molecular weight PAM requires high purity of raw materials. Generally, industrial monomers contain impurities such as iron, copper and O2. These impurities hinder the reaction. Therefore, when using acrylamide monomer, the content must be controlled. above 95.

In the production of PAM, the role of the initiator is mainly to cause the oxidation-reduction reaction. The amount of initiator and the rate of addition also affect the production of low molecular weight products. The amount of the initiator is small, the polymerization reaction cannot be initiated, the amount of the initiator is large, the reaction rate is accelerated, the molecular chain of the polymer is not easily grown, the average degree of polymerization is lowered, and the molecular weight is decreased. The initiator addition rate and method affect the molecular weight of the polymer. A large number of practices have proved that the molecular weight of the polymer increases with the addition time, and vice versa, the molecular weight of the polymer decreases. Therefore, strict control of the amount of initiator and the rate of addition is a critical part in the production of low molecular weight products.

The reaction temperature also directly affects the molecular weight. The temperature is too high, the polymerization reaction is intensified, and the explosion is formed, which seriously affects the molecular weight and the solubility of the product. On the contrary, if the temperature is too low, the polymerization reaction cannot be completely carried out, and the molecular weight is also affected. size. Therefore, in production, this is as important as the use of the initiator, requiring uniform requirements and strict control.