What is nonionic polyacrylamide?

Nonionic polyacrylamides represent the smallest group of acrylamide-based polymers, representing about 25% of the total polyacrylamide market. Nonionic polyacrylamide is somewhat misleading since in the manufacture of acrylamide, regardless of the route, some degree of hydrolysis of acrylamide occurs.

What is a high molecular weight nonionic polyacrylamide?

High-molecular-weight nonionic polyacrylamides are routinely used in the mineral processing industries as thickeners and flocculants , , . 34.2.5. Polyacrylamide product forms The product types for polyacrylamides are solutions, liquids (emulsion or dispersion), and dry powders.

What are polymeric polyelectrolytes?

There are many definitions for polymeric polyelectrolytes in the literature , , . In the simplest sense, water-soluble polyelectrolytes are polymers that contain charged disassociating monomer subunits. The charges can be pendant to the polymer chain or be part of the polymer chain itself.

What is an anionic polyacrylamide?

Anionic polyacrylamides make up the largest portion of the polyacrylamide market. The polymers can be prepared over a wide range of anionic charges and molecular weights (1000 to > 20,000,000 molecular weight). The workhorse comonomer for the production of anionic polyacrylamides is acrylate salts of acrylic acid.

How is non ionic polyacrylamide produced?

Non-ionic polyacrylamide may be produced from its monomer by free radical polymerization using a wide variety of initiation methods.

What is the use of anionic polyacrylamide in water and wastewater treatment?

The main use of anionic polyacrylamides in water and wastewater treatment is as coagulant aid to bridge the coagulated particles formed when an inorganic coagulants such as alum has been used as the primary coagulant. Fig. 2. Hydrolysis of polyacrylamide