Polyscrylamide (PAM) is a water-soluble linear polymer made by polymerization of acrylamide monomer. The chemical properties of monomer acrylamide is very active, and a series of chemical reactions can be carried out in the double bond and amide group, using different processes, importing different functional groups, you can get different charge products: anionic, cationic, non-ionic, amphoteric polyacrylamide.