Introduction of polyacrylamide

Polyacrylamide is acrylamide monomers by free radical polymerization initiator soluble linear polymers, insoluble in most organic solvents, good flocculation resistance, can reduce the frictional resistance between the liquids, ionic character by sub-divided into non-ionic, anionic polyacrylamide, cationic and amphoteric polyacrylamide four types.

Polyacrylamide as a white powder, a density of 1.32g/cm3 (23 degrees), the glass transition temperature of 188 degrees, 210 degrees near the softening temperature, generally the method of drying a small amount of water, will dry quickly from environment absorb moisture. Isolated by lyophilization soft homopolymers are non-crystalline white solid, but when precipitated from solution and dried partially transparent glassy solid was completely dry polyacrylamide is a white brittle solid. PAM dried product is usually dried under conditions of moderate, generally a water content of 5 percent to 15 percent prepared by casting the polymer film on the glass, it is transparent, hard, brittle, solid.
 

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