Chemical Polymerization Method of High Molecular Weight Cationic Polyacrylamide

Abstract

A high molecular weight cationic polyacrylamide chemical polymerization method, the weight of each polymerization component is: solid acrylamide monomer: 490-520kg; DAC cationic monomer: 104-124kg; deionized water: 1356-1956kg; : 1.6-2.0kg; ammonium persulfate: 10-14g; ferrous ammonium sulfate: 6-10g. Ammonium ferrous sulfate with a stable chemical structure is selected as an auxiliary agent for reducing the activation energy of the polymerization reaction. Make the polymerization reaction occur in a large amount at a relatively low temperature, even in the case of low temperature in winter, the polymerization reaction can be completed in about 4 hours, the production is smooth, the molecular weight of the product is stable, and the product has good solubility in water.

Description

【Technical field】 [0001] The present invention relates to a homopolymer or copolymer composition having one or more unsaturated aliphatic compounds, in particular to polyacrylamide, especially a chemical polymerization method for high molecular weight cationic polyacrylamide. 【Background technique】 [0002] The synthesis of cationic polyacrylamide generally adopts the method of high and low temperature two-stage initiation system polymerization. The persulfate-sodium bisulfite redox initiation system is often used for polymerization at lower temperatures. Since the polymerization between acrylamide monomers is an exothermic reaction, the temperature of the polymerization system gradually increases with the release of reaction heat. Under certain conditions, the initiation of the polymerization reaction is completed by azo. The higher the polymerization temperature, the smaller the molecular weight of the product. At the same time, if the highest polymerization temperature e...

AI Technical Summary

Problems solved by technology

Although the occurrence or acceleration of polymerization can be promoted by increasing the initiator, the molecular weight of the product will also decrease accordingly, failing to achieve the purpose of synthesizing high molecular weight products

Moreover, the amount of additional initiator added each time is based on whether the polymerization reaction is carried out or accelerated, and the amount added is also uncertain, resulting in inconsistent molecular weights of each batch of products, resulting in unstable product quality