Study On Bifunctional Complex System Initiated AM/DMC,AM/AA Copolymerization

Acrylamide-based polymers (PAM), because of their superior performance such as flocculating, thickening, reducing resistance and so on are widely used in EOR, paper-making, water treating, chemical engineering, metallurgy, geology, coal, textile and other light industries, and their main uses have grown to about 27 areas.This paper describes the initiating mechanism of bifunctional peroxide initiator and its applications on the basis of the description of common initiator. By using a complex initiating system of bifunctional peroxide-sodium bisulfate redox initiator, water-soluble azo-compound 2 , 2'-azobis(2-ami-dinopropane)hydrochloride(AIBA·2HCl), cationic Polyacrylamide P(AM-DMC) and anion poly-acrylamide P(AM-AA) were synthesized with acrylamide(AM) and (2-methacryloyloxyethyl)trimethyl ammonium chloride(DMC), acrylic acid(AA) respectively by aqueous solution copolymerization. And the trigger temperature, monomer ratio, the concentration of bifunctional peroxide initiator, PH value, azo initiator concentration on the effects of intrinsic viscosity were explored. The optimal reaction conditions of P(AM-DMC)( monomer total mass fraction is 30%) and P(AM-AA) have been obtained . IR certificated the target copolymer. DSC-TGA thermal stability analysis shows that they can be used in the vast majority of areas.Then by using bifunctional peroxide-sodium bisulfate redox initiator in aqueous solution, P(AM-DMC), P(AM-AA) were synthesized with AM and DMC, AA respectively in 50℃. The copolymer composition of P(AM-DMC) was determined by using elemental analysis as well as Mohr's method, and the copolymer composition of P(AM-AA) was determined by using elemental analysis only. Under experimental conditions, the reactivity ratios of all monomers are calculated by three methods: F-R, K-T, and YBR in the AM/DMC, AM/AA copolymerization system. The results showed that the reactivity ratios from different calculation methods for each copolymerization system fitted very well. Sequence length distribution of AM/DMC, AM/AA Copolymers' main chain is obtained on the basis of the reactivity ratios of monomers. Analysis of the results shows that the alternating tendency prevails when the molar fraction of each monomer is near, the chain segments of one monomer is equably mainly separated by 1M chain segment of the other monomer whose molar fraction is very small when the molar fraction of each monomer is of big difference in the same copolymerization system. Q, e values of DMC, AA were obtained by Alfrey-Price equation.Finally, through the flocculation experiments of using P(AM-DMC), P(AM-AA) which were synthesized under the optimum conditions to dispose bentonite suspension and urban life wastewater respectively, the results show that they have good flocculating performance ,and be able to meet production and life needs.