Preparation And Application Of Ionic Polyacrylamide

Polyacrylamide (PAM) is a general term of water-soluble polymer, which is homopolymer of acrylamide monomer or copolymerization with other monomers and content is over 50% .It is an important water-soluble polymer and can dissolve or swell in water, forming solution or dispersion .With the continuous development of polymerization science, the kinds of polyacrylamide polymers is increased. Polyacrylamide is mainly divided into:non-ionic polyacrylamide, anionic polyacrylamide, cationic polyacrylamide and amphoteric polyacrylamide. In this work, anionic PAM and ternary cationic P (AM-DMC-DMDAAC) was synthesized by solution polymerization and P(AM-DMC) was synthesized by inverse emulsion polymerization, and then examined their flocculent property.Series of anionic polyacrylamide was synthesized by solution polymerization with acrylamide (AM) and acrylic acid as raw materials by oxidation– reduction initiator under appropriate conditions. And the polymer shows good flocculating performance to laboratory simulative wastewater .The ternary cationic flocculant P(AM-DMC-DMDAAC) was synthesized by aqueous solution polymerization with raw meterials of acrylamide (AM), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and dimethyl diallyl ammonium chloride (DMDAAC).The ratio of three monomers(AM:DMC:DMDAAC) was 5:4:1, amount of water-soluble azocompound V-50 was 0.07%, amount of EDTA-2Na was 0.1%, monomer mess concentration was 40%, reacted at 50℃for 4hs to get the copolymer with the molecular weight up to 5.0×10~6and it has excellent water-dissolubility. And, the terpolymer shows better flocculating performance to slurry compared with other kinds of flocculants.The cationic copolymer P (AM-DMC) was synthesized by inverse emulsion polymerization with monomers of acrylamide (AM) and methacryloyloxyethyl trimethyl ammonium chloride (DMC) , span80-op10 as emulsifier. The oil-water ratio was 1.1:1, speed was 1000r/min, monomer mess concentration was 30%, amount of water-soluble azocompound V-50 was 0.07%, molar ratio of AM and DMC was 95:5, amount of EDTA-2Na was 0.1% , amount of emulsifier was 8%, value of HLB was 6, reacted at 50℃for 4hs to get the copolymer with the molecular weight up to 5.0×10~6 and it has excellent water-dissolubility. This copolymer shows a good flocculating performance to slurry.