Polyacrylamide is referred to as PAM.

It is usually a high molecular polymer with a head-to-tail bonded structure of acrylamide monomers.

It is a hard glassy solid at room temperature. Due to different preparation methods, the products are white powder, translucent beads and flakes. Density 1.302g/cm3 (23℃), glass transition temperature 153℃, softening temperature 210℃. It has good thermal stability. It is soluble in water, and the aqueous solution is clear and transparent.

Its viscosity becomes obviously stickier with the increase of polymer molecular weight, and it increases and decreases logarithmically 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 Chemicalbook.

It is formed by free radical polymerization of acrylamide monomers, and several methods such as solution polymerization, inverse emulsion polymerization, suspension polymerization and solid-state polymerization can be used.

The product is required to have a controllable molecular weight, easy solubility in water and less residual monomers. Polyacrylamide is one of the most widely used varieties of water-soluble polymers, and its main chain carries a large number of side amide groups.

The chemical activity of amide groups is very large, and a series of derivatives can be generated with a variety of compounds. Polyacrylamide has many functions such as flocculation, thickening, drag reduction, bonding, colloid stabilization, film formation and scale inhibition.

It is widely used in industrial sectors such as papermaking, mining, coal washing, metallurgy, and oil extraction. It is an important chemical for water treatment.