Overview
Anionic Polyacrylamide (APAM) with 30 million molecular weight is a high-performance water-soluble polymer derived from acrylamide monomers. Its ultra-high molecular chain length and negative charge density make it particularly effective for flocculation and viscosity modification applications. As a specialty chemical, APAM-30M is manufactured through controlled polymerization processes to achieve precise molecular weight distribution. The anionic character is introduced via copolymerization with acrylic acid or hydrolysis of polyacrylamide.
Physical and Chemical Properties
The 30 million Dalton molecular weight gives APAM exceptional solution viscosity even at low concentrations (0.1-0.5%). In water, the extended polymer chains create a network that bridges suspended particles through charge neutralization and adsorption. Key characteristics include pH stability (effective in 5-10 range), shear-thinning behavior, and temperature resistance up to 60°C. The anionic charge density typically ranges from 10-30%, allowing effective interaction with positively charged contaminants.
Main Applications
In wastewater treatment, APAM-30M is the preferred flocculant for municipal sewage and industrial effluents containing organic matter or metal hydroxides. Its long polymer chains rapidly aggregate fine particles into settleable flocs. The oil industry utilizes it for drilling fluid viscosity control and produced water treatment. In mining, it enhances solid-liquid separation in tailings processing. Other applications include paper strengthening, soil conditioning, and textile sizing.
Safety and Storage
While APAM itself is non-hazardous, the powder form requires careful handling to avoid dust inhalation. Storage in original moisture-proof packaging is critical - exposure to humidity causes caking and reduces solubility. For large-scale users, silo storage with desiccant systems is recommended. Shelf life is typically 2 years when stored properly. Spills should be cleaned with dry methods before wet mopping to prevent slippery surfaces.
B2B Procurement Guide
Industrial buyers should specify: 1) Molecular weight distribution (GPC tested) 2) Anionic degree 3) Residual acrylamide content (<0.05%) 4) Dissolution rate. Bulk shipments require moisture-proof containers or lined tank trucks for liquid formulations. Quality verification should include viscosity measurement (0.1% solution ≥4000cP) and flocculation tests with target wastewater samples. Leading manufacturers provide technical support for dosage optimization based on specific application conditions.
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