Properties of AMPS ®
Hydrolytic and thermal stability : The geminal dimethyl group and the sulphomethyl group combine to sterically hinder the amide functionality and provide both hydrolytic and thermal stabilities to AMPS containing polymers. Polarity and Hydrophilicity : the sulphonate group gives the monomer a high degree of hydrophilicity and anionic character at wide range of PH. In addition, AMPS is absorbing water readily and also imparts enhanced water absorption and transport characteristics to polymer. Solubility : AMPS is very soluble in water and dimethylformamide (DMF) and also shows limited solubility in most polar organic solvents. Inhibition of divalent cation precipitation : Sulphonic acid in AMPS is a very strong ionic groups and ionizes completely in aqueous solutions. In applications where the precipitation of mineral salts is undesirable, the incorporation of a polymer containing even a small quantity of AMPS can significant reduction in the precipitation of a wide variety of mineral salts, including calcium, magnesium, iron, aluminum, zinc, barium and chromium.