Polyacrylamide CAS 9003-05-8
Polyacrylamide is widely used in water treatment, mining and paper industries, where it is used as a flocculant to aggregate fine particles and improve sedimentation. Depending on the charge (anionic, cationic or nonionic), it is selected for specific technological tasks.
Chemical structure and synthesis
The main repeating structural element polyacrylamide has the form:
−CH2−CH(CONH2)−
Synthesis is carried out by free radical polymerization of acrylamide in an aqueous solution using initiators, which allows controlling the molecular weight and degree of branching of the polymer.
Physico-chemical properties
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Solubility: It is highly soluble in water, forming viscous solutions even at low concentrations.
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Viscosity: The high viscosity of the solutions is due to the long polymer chains.
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Stability: It is chemically inert over a wide pH range, which ensures stability during long-term storage and use.
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Type of charge: It is possible to modify the structure to obtain anionic, cationic, or nonionic polyacrylamides.
Application
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Water and wastewater treatment: It serves as a flocculant for precipitation of suspended particles.
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Mining industry: It is used for aggregation of mineral particles during mining.
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Paper industry: Improves sedimentation and promotes the formation of composites.
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Agriculture: It is used to improve soil structure and control erosion.
Conclusion
Polyacrylamide, due to its high flocculation ability, is an indispensable component in the processes of purification and stabilization of suspensions. The choice of polyacrylamide type (anionic, cationic or nonionic) allows its properties to be adapted for various technological processes.
