Nsc7964

Polyacrylamide is abbreviated as PAM. Usually a polymer with a head tail bonding structure of acrylamide monomer, it is a hard glassy solid at room temperature. Due to different manufacturing methods, products include white powder, semi transparent beads, and flakes. Density 1.302g/cm3 (23 ℃), glass transition temperature 153 ℃, softening temperature 210 ℃. Has good thermal stability. Soluble in water, the aqueous solution appears clear and transparent, and its viscosity significantly increases with the increase of polymer molecular weight, showing a logarithmic increase or decrease relationship with the concentration of the polymer. Except for a few solvents such as acetic acid, acrylic acid, chloroacetic acid, ethylene glycol, glycerol, and formamide, it is generally insoluble in organic solvents such as Chemicalbook. It is formed by free radical polymerization of acrylamide monomer, and can adopt several methods such as solution polymerization, inverse lotion polymerization, suspension polymerization and solid polymerization. It is required that the molecular weight of the product be controllable, easily soluble in water, and have few residual monomers. Polyacrylamide is one of the most widely used water-soluble polymers, with a large number of side amide groups on its main chain. Amide groups have significant chemical activity and can form a series of derivatives with various compounds. Polyacrylamide has various functions such as flocculation, thickening, drag reduction, adhesion, colloid stabilization, film formation, and scale inhibition. It is widely used in industrial sectors such as papermaking, mining, coal washing, metallurgy, and petroleum extraction, and is an important chemical in water treatment.