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Polyacrylamide, pam, anionic polyacrylamide, cationic polyacrylamideIntroduction Polyacrylamide (PAM) is a general term for acrylamide homopolymer or polymer copolymerized with other monomers. It is one of the widely used varieties of water-soluble polymers. Because the polyacrylamide structural unit contains amide groups, it is easy to form hydrogen bonds, so that it has good water solubility and high chemical activity, and it is easy to graft or crosslink a variety of modified products with branched or network structure. It has a wide range of applications in petroleum exploration, water treatment, textile, papermaking, mineral processing, agriculture and other industries, and is known as "Auxiliary Agents for All Industries". The main application areas abroad are water treatment, papermaking, mining, metallurgy, etc.; the current domestic use is in the field of oil production, and the rapid increase in consumption is in the field of water treatment and papermaking
Physical and chemical properties PAM? Polyacrylamide is a water-soluble linear high-molecular polymer formed by the polymerization of acrylamide (AM) monomer through radicals. It has good flocculation and can have resistance between them. It can be divided into ionic characteristics. There are four types of non-ionic, anionic, cationic and amphoteric type. At a suitable low concentration, the polyacrylamide solution can be regarded as a network structure, and the mechanical entanglement and hydrogen bonds between the chains form a network node; when the concentration is high, the solution contains many chain points, which makes the PAM solution It is gelatinous. Anionic polyacrylamide (APAM) product description: Anionic polyacrylamide (APAM) is white powder with a molecular weight ranging from 6 million to 25 million. It has good water solubility and can be dissolved in water in any proportion and is insoluble. The effective PH value ranges from 7 to 14. It exhibits the characteristics of a high polymer electrolyte in a neutral alkaline medium, and can be cross-linked with salt electrolytes and high-valent metal ions to form an insoluble gel. Drinking water treatment: The water source of many water plants in my country comes from rivers, with high sediment and mineral content and relatively turbidity. Although it is filtered through sedimentation, it still cannot meet the requirements. Flocculants need to be added. The dosage is 1/50 of inorganic flocculants. , But the effect is several times that of inorganic flocculants, and it is better to use cationic polyacrylamide in river water with serious organic pollution.
The effect of hydrolysis time on the viscosity of polyacrylamide The viscosity of polyacrylamide solution changes with the hydrolysis time. The hydrolysis time is short and the viscosity is small. This may be due to the fact that the polymer has not had time to form a network structure; the hydrolysis time is too long, The viscosity drops, which is caused by the structure of polyacrylamide in the solution being loosened. Partially hydrolyzed polyacrylamide dissociates into negatively charged macromolecules after being dissolved in water. The electrostatic repulsion between molecules and the anionic repulsive force between different chains on the same molecule stretch out in the solution and make the molecules entangle with each other. This is the reason why partially hydrolyzed polyacrylamide can make the solution viscosity obvious.