⟡ Water Treatment & Functional Polymers / Cationic Polyelectrolytes
Poly(diallyldimethylammonium chloride) (PolyDADMAC) is a water-soluble, cationic polyelectrolyte composed of quaternized ammonium functional groups. This polymer, with an approximate molecular weight of 240,000, is supplied in powder form and is widely used in applications requiring charge neutralization, surface modification, and interaction with negatively charged species.
The cationic nature of PolyDADMAC enables strong electrostatic interactions with anionic materials, making it effective in aqueous systems for coagulation, flocculation, and surface treatment processes. Its performance is closely tied to molecular weight and charge density, which influence adsorption behavior and process efficiency.
Key Properties of PolyDADMAC (MW ~240,000)
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Polymer type: Cationic polyelectrolyte
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Chemical name: Poly(diallyldimethylammonium chloride)
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Molecular weight: ~240,000
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Form: Powder
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Charge: Strongly cationic (quaternary ammonium)
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Solubility: Water soluble
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Functional behavior: Charge neutralization, adsorption, flocculation
Applications of Poly(diallyldimethylammonium chloride)
Water treatment and clarification
PolyDADMAC is widely used as a coagulant and flocculant for removing suspended solids, organic matter, and negatively charged contaminants from water. Its cationic charge supports efficient particle aggregation and sedimentation.
Pulp, paper, and textile processing
Used as a retention and drainage aid, PolyDADMAC improves process efficiency by enhancing fiber and filler retention and supporting water removal during manufacturing.
Surface modification and coatings
PolyDADMAC is applied in surface treatments and antimicrobial coatings, where its cationic properties promote interaction with negatively charged substrates and functional additives.
Electronics and conductive materials research
Utilized in electrostatic layer formation and thin-film assembly for sensors and conductive polymer systems.
Functional Role
PolyDADMAC functions as a high-charge-density cationic polymer that interacts strongly with negatively charged surfaces, particles, and dissolved species. In aqueous systems, it promotes flocculation through charge neutralization and bridging mechanisms, while in surface applications it enhances adhesion and functional coating performance.
Why Molecular Weight Matters
The molecular weight of PolyDADMAC influences its performance in solution. At approximately 240,000 molecular weight, this grade provides a balance between charge density, solubility, and flocculation efficiency. Molecular weight impacts adsorption behavior, particle aggregation, and overall process effectiveness in both industrial and laboratory applications.
Handling & Storage
- Store in a cool, dry place in a tightly sealed container.
- Avoid exposure to moisture prior to use.
- Use appropriate laboratory safety practices when handling powders.
- Consult the SDS for detailed handling, storage, and safety information.
FAQ
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What is Poly(diallyldimethylammonium chloride) used for?
PolyDADMAC is used as a cationic polymer for water treatment, flocculation, surface modification, and industrial processing applications.
Is PolyDADMAC water soluble?
Yes, PolyDADMAC is water soluble and forms cationic polymer solutions that interact with negatively charged materials.
What role does charge play in PolyDADMAC performance?
The quaternary ammonium groups provide a strong positive charge, enabling efficient interaction with negatively charged particles, surfaces, and dissolved species.
What industries use PolyDADMAC?
PolyDADMAC is used in water treatment, paper and textile processing, coatings, and materials research applications.
How does molecular weight affect PolyDADMAC?
Molecular weight influences flocculation efficiency, adsorption behavior, and solution properties, affecting performance across different applications.
