Study On The Polymerization Of Acrylamide Initiated By Bifunctional Initiator

PAM and its ramification is a new sort of fine production with macromolecule, which is water-soluble and is very important raw material in producing polymerized electrolyte. It is widely used in every department of industry, such as chemical engineering, metallurgy, geology, coal, oil, paper making, water tackling, spinning and so on. In recent years, the ploymerflooding play a great role in the stable yield of the oil field. We add water-soluble polymer to the injecting water and enhance the viscosity of solution, so we can reduce the gap of viscosity between raw oil and injecting water and enhance the fluidity rate and the sweep efficiency. Consequently, we enhance the recovery efficiency. In The DaQing Oil Field, the yield is up and the water concentration is down after adopting the ploymerflooding.hi this paper, our main task is examining the conditions of hydrolyzation after homopolymerization that is to produce hydrolyzed polypropylene amide with high molecular weight by bifunctional initiator and double polymerization. The conditions include the monomer concentration, the quantity of initiator, the quantity of reducing agent, the mol ratio of reducing agent to initiator, the solicitation temperature, the quantity of azodiisobutyronitrile, the quantity of EDTA, the quantity of agent transferring chain(HCOONa), the quantity of Na3PO4.12H2O, the hydrolyzation time and the hydrolyzation temperature. The result shows when the monomer concentration is 25%, the quantity of initiator is 45 μmol·L-1(the density of AM is equal to the density of water), the quantity of reducing agent is 54μmol· L-1, the mol ratio of reducing agent to initiator is 1.2:1, the quantity of azodiisobutyronitrile is 9.852mg·mol-1 (the base is monomer) , the EDTA concentration is 0.15mmol/L, the quantity of Na3PO4.12H2O is 2.84mg.mol-1, the hour of hydrolyzation is 2.5h and the temperature of hydrolyzation is 90℃, we had produced polypropylene amide with high molecular weight of 3,348 milllion and the rate of hydrolysis of it range from 20% to 30% and the solubility of it is good.The production is suitable to tertiary oil recovery.Moreover, we had done primary study on dynamics of the bifunctional initiator's oxidation-reduction solicitation system in producing polypropylene amide and the heat decomposition of bifunctional initiator by iodonation and bromination method. The compound with two active groups is bifunctional initiator with free radicles. Although we had known the merits of the bifunctional initiator, our research on it is shallow. The study on dynamics of polymerization is limited in the system of polystyrene and the initiator is limited by heat decomposition. Nothing had been done on dynamics of other polymerization systems and the bifunctional initiator's oxidation-reduction solicitation System. So our study on it is very significant theoretically. The results show that thermal decomposition series of bifunctional initiator is 1, thermal decomposition factor of it is 6.63 ×1010, thermal decomposition activation energy of it is 82.6KJ/mol; the polymerization rate is in direct ratio to the monomer concentration, the reduction agent and the initiator, and the reaction order of the monomer concentration is 2.73, the reaction order of the reduction agent is 1.45, the reaction order of the initiator is 1.35, apparent activation energy is 0.38KJ/mol. In addition, we made hypothesis of q value based on the results of polymerization dynamics.