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.

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.

Which polyacrylamide has the lowest stability?

On the other hand, very low molecular weight polyacrylamide displayed the lowest stability. The increase in molecular weight caused a decrease of weight loss %. The residue at 600oC being 11.67%, 14.68%, 17.83%, 19.45%, and 22.55% for the cases of very low, low, medium, high and very high molecular weight polyacrylamides respectively.

What are the different types of polyacrylamide?

There is a wide range of diverse solution polyacrylamides available in the commercial marketplace (anionic, cationic, and nonionic). They cover a wide range of charges and can range in molecular weights from the thousands to one or two million Daltons.

What is low molecular weight polyacrylamide?

Low molecular weight polyacrylamide was synthesized using hydrogen peroxide as initiator and the reaction was carried out at high temperature (90oC) to give polyacrylamide free of contaminates detected by FTIR spectroscopy. The product was a low viscosity white colour liquid.

How to make high molecular weight polyacrylamide?

Thus, under nitrogen atmosphere 15, 30 and 50 gm of acrylamide monomer were polymerized in (500ml) distilled water as a solvent and the (0.135gm) potassium persulfate/(180μl) TEMDA system as initiator to produce medium, high and very high molecular weight polyacrylamides respectively.