Polyacrylamide is a water-soluble linear polymer polymerized by free radical polymerization of acrylamide (AM) monomers. It has good flocculation properties and can reduce the frictional resistance between liquids. It can be divided according to ion characteristics. Non-ionic, anionic, cationic and amphoteric types. Polyacrylamide (PAM) is insoluble in most organic solvents such as methanol, ethanol, acetone, ether, aliphatic hydrocarbons and aromatic hydrocarbons, except for a few polar organic solvents such as acetic acid, acrylic acid, chloroacetic acid, ethylene glycol, glycerin, Molten urea and formamide. However, these organic solvents have limited solubility and often require heating, otherwise they have little application value.
At a suitable low concentration, the polyacrylamide solution can be considered as a network structure, and mechanical entanglements and hydrogen bonds between the chains form a mesh node together; when the concentration is high, the solution contains many chain-link contacts, making the PAM The solution is gel-like. The PAM aqueous solution is well compatible with many water-miscible organics and has good compatibility with electrolytes. For ammonium chloride, calcium sulfate, copper sulfate, potassium hydroxide, sodium carbonate, sodium borate, and nitric acid. Sodium, sodium phosphate, sodium sulfate, zinc chloride, boric acid and phosphoric acid are insensitive.
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Analysis of physicochemical properties of polyacrylamide in Zhaotong
November 04 04:00:07, 2024
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