Overview
Hydrolyzed Polyacrylamide (HPAM) is a modified form of polyacrylamide where some amide groups are hydrolyzed to carboxyl groups. This water-soluble polymer is known for its exceptional flocculation properties and viscosity-enhancing capabilities. HPAM finds extensive applications across multiple industries due to its ability to interact with suspended particles in aqueous solutions. The polymer's performance characteristics are determined by factors such as molecular weight, degree of hydrolysis, and chain structure. Industrial-grade HPAM typically has a hydrolysis degree ranging from 5% to 35%. The product is available in various physical forms including powders, granules, and emulsions to suit different application requirements.
Physical and Chemical Properties
HPAM exhibits unique rheological properties that make it valuable in industrial applications. In solution, the polymer chains stretch and create network structures that significantly increase viscosity even at low concentrations. The carboxyl groups introduced through hydrolysis provide negative charges along the polymer backbone, enhancing its interaction with positively charged particles. The polymer's performance is temperature-dependent, with optimal effectiveness typically between 20-60°C. HPAM solutions are pseudoplastic, showing decreased viscosity under shear stress. The molecular weight directly impacts solution viscosity and flocculation efficiency, with higher molecular weight grades generally offering better performance in most applications.
Main Applications
In water treatment, HPAM serves as an effective flocculant for clarifying drinking water and treating industrial wastewater. Its ability to aggregate suspended particles accelerates sedimentation and filtration processes. The oil industry utilizes HPAM for enhanced oil recovery (EOR), where it improves water viscosity to increase sweep efficiency in reservoirs. The paper manufacturing sector employs HPAM as a retention aid and dry strength agent. Mining operations use it for tailings treatment and mineral processing. Other applications include soil conditioning, textile processing, and as a friction reducer in hydraulic fracturing fluids. The specific grade and formulation of HPAM are selected based on the ionic strength and pH of the application environment.
Safety and Storage
While HPAM is generally considered non-toxic, proper handling procedures should be followed. Dry powder forms can generate dust that may irritate respiratory systems, requiring appropriate respiratory protection during handling. Skin contact should be minimized as the polymer can absorb moisture and cause mild irritation. Storage conditions are critical for maintaining product quality. HPAM should be kept in original packaging in a cool, dry environment with controlled humidity below 65%. Exposure to moisture can lead to caking and reduced solubility. The product has good shelf stability when properly stored, typically 12-24 months depending on packaging. Bulk storage areas should be equipped with proper ventilation and fire prevention measures.
B2B Procurement Guide
When procuring HPAM commercially, buyers should clearly specify technical parameters including molecular weight range (low, medium, or high), degree of hydrolysis, and ionic character (anionic, nonionic, or cationic). The product form (powder, granule, or emulsion) should match the end-use application requirements and available handling equipment. Quality certifications such as ISO 9001 and specific industry standards (e.g., NSF for water treatment applications) should be verified. Bulk purchasing typically offers cost advantages, but storage capacity and usage rates should be considered. For large-volume users, establishing long-term supply agreements with manufacturers can ensure consistent quality and price stability. Technical support for product selection and application optimization is often available from reputable suppliers.
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