What are the properties of Anionic Polyacrylamide?
2026-04-14 10:13:41
Anionic Polyacrylamide(APAM)is a linear,water‑soluble,high‑molecular‑weight polymer with negatively charged functional groups along its molecular chain.It shows the following key physical and chemical properties:
Excellent water solubility
It dissolves easily in cold and warm water to form a clear,viscous solution.It is insoluble in oil,acetone,ethanol,and other organic solvents.
High molecular weight
Typical molecular weight ranges from 3–25 million,which determines its flocculation,thickening,and bridging ability.
Adjustable charge density
The degree of hydrolysis(anionic charge)can be customized from low to high,adapting to different water quality and suspended particle characteristics.
Strong flocculation ability
Through adsorption bridging and charge neutralization,it quickly aggregates suspended particles into large,compact flocs with fast settling speed.
Good thickening and rheological behavior
Significantly increases solution viscosity at low dosage,providing stable shear resistance and suspension stability.
Wide pH application range
Works effectively in pH 5–12,especially stable in neutral and alkaline water environments.
Low dosage and high efficiency
Effective at parts‑per‑million(ppm)levels,greatly improving solid‑liquid separation efficiency.
Good thermal and chemical stability
Stable under normal temperature and common electrolyte conditions;maintains performance in moderately saline water.
Non‑toxic and environmentally compatible
Non‑toxic under normal application conditions,widely used in drinking water pretreatment,industrial water,and environmental engineering.
References
GB/T 7714
Chen G,Lin F,Huang Y.Study on basic properties and application performance of anionic polyacrylamide[J].Water Purification Technology,2022,41(3):67–73.
MLA
Chen,Guo,et al."Study on Basic Properties and Application Performance of Anionic Polyacrylamide."Water Purification Technology,vol.41,no.3,2022,pp.67–73.
APA
Chen,G.,Lin,F.,&Huang,Y.(2022).Study on basic properties and application performance of anionic polyacrylamide.Water Purification Technology,41(3),67–73.
