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Synthesis of Modified Cationic Polyacrylamide and Researches of Flocculation Properties

Author: CuiLiYan
Tutor: LiuLiXin
School: Northeast University of Petroleum
Course: Chemical processes
Keywords: Cationic polyacrylamide (CPAM) Copolymerization Hyperbranched polyamidoamine Grafting reaction Flocculant
CLC: O633.22
Type: Master's thesis
Year: 2011
Downloads: 135
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Abstract


Preparation and Application of cationic polymer flocculant preliminary research and exploration . Acrylamide (AM) , respectively, and dimethyl diallyl ammonium chloride (DMDAAC), methacryloyloxyethyl trimethylammonium chloride (DMC) and acryloyloxyethyl trimethyl ammonium chloride ( DAC) three cationic monomer as raw materials , by aqueous solution polymerization , synthetic binary copolymerization cationic polyacrylamide. And introducing the further synthesis of a terpolymer of acrylamide acrylate grafting reaction , but this terpolymer and hyperbranched polyamide amine . Using the Bruker-Tensor27 type Fourier transform infrared spectrophotometric instrumentation intrinsic structure of the product of the synthesis of several ; discuss the influence of various factors on the performance of the product and by the determination of the viscosity of the polymer characteristics , such as cationic degree , the experimental optimization polymerization conditions for single body concentration of 30 % , the DAC and AM molar ratio of 3:7 , and the polymerization temperature was 5 ° C , of K2S2O8 - Effects of NaHSO3 as redox low temperature section of the initiator concentration was 0.05 ‰ ( on total monomer) in the molar ratio of 1 : 2, azobisisobutyronitrile (AIBN) initiator for the high temperature section , the concentration is 0.125 ‰ , urea as dissolution aids, disodium edetate polymeric complexing agent , to obtain a molecular weight of 619 × 104 of the cationic type polyacrylamide (CPAM). The experiments carried out on the polymer obtained in the flocculation performance of the analog ASP flooding sewage experiment the ungrafted cationic polyacrylamide, cationic modified and unmodified hyperbranched polyamide amine graft polymer flocculation performance and different the flocculation performance of the graft polymer of the acrylic acid content was compared. Experiment has better flocculation graft ratio of the ungrafted polymer after modification has more significant flocculation hyperbranched polyamide amine graft acrylic acid content was observed that when the content is 30% , the cationic modified hyperbranched polyamidoamine grafted copolymer has the best flocculation effect , light transmission rate of up to 94.3% .

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Miscellaneous Chain Polymers > Nitrogen-containing polymer chain > Polyamide
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