Study On Synthesis And Propertes Of Different Associations Of Mediated Interpolymer Complexes Drag Reducing Polymer Based On Long Chain Methacrylate

At present, the crude oil were transported essentially by pipeline at home and abroad, but the actual operation of the pipeline transport cost large energy consumption, especially to those aging and corrosing pipes for long-term service, the required output would not be acquired under the original design pressure.To solve the problem, the pump was used to increase the pressure to maintain the oil output, which,however,adds security risk. Adding a small amount of drag reduction polymers, can play role in reducing the pipeline resistance and increase the oil output. Currently the widely used oil-soluble drag reduction polymer in pipeline transport is mainly a-olefin polymer, and it can effectively increase the amount of oil output. However, drag reduction of the polymer will be lost when the polymer flow through the pump of high-speed rotation, and the pump will fracture the molecular chain, that is the polymer owns low anti-shear stability. Research and development of the drug polymers owning drag reduction performance and the anti-shear resistance constitute the forefront and hot issues of oilfield chemicals.The molecular dynamics simulation method was used to simulate the spatial structure of hydrogen bonding mediated interpolymer complexes in the oil during its dissolving process; the trend curve of temperature was obtained and interaction energy between hydrogen bonding mediated inter polymer complexes and crude oil was calculated,at the same time, single intermolecular hydrogen bond length of oil drag reduction polymer was calculated.The result showed, when the alkyl number of hydrogen bonding mediated interpolymer complexes was twelve, the resistance to dissolve in the oil is least and the side chain was much stretcher.The synthesis of2-ehylhexyl methacrylate, lauryl methlacrylate, tetradecyl methacrylate, hexadecyl methylacrylate and octadecyl methylactylate were obtained using the method of direct esterification. The different side chain hydrogen bond association of drag reduction polymers were synthesized by the method of emulsion polymerization. According to the results of compariving research, lauryl methlacrylate was the best monomer to this kind og drag reduction polymers.Using lauryl methlacrylate as the monomer,the ion-dipole interaction and the coordination association interaction of drag reduction polymers were also synthesized by the method of emulsion polymerization;In order to choose the best method to obtain the coordination association interaction of drag reduction polymer, the synthesis of those were acquired by the methods of solution polymerization, emulsion polymerization and suspension polymerization respectively. At last, according to the comparative study.the best optimum polymerization method to synthesize the coordination association interaction of drag reduction polymers is emulsion polymerization.In our study, the molecular structure of monomers and the drug reduction polymers were characterized by Fourier transform infrared spectroscopy instrument, and hydrodynamics radius and glass transition temperature of the drug reduction polymers were also examined by thermal analysis instrument and VISCOTEK DLS, the rusults confirmed association interaction between the polymers. At the same time,we do the comparative research and compare the drag reduction and anti-shearing stability of different side chain hydrogen bond association of drag reduction polymers, the ion-dipole interaction and coordination complexon of drag reduction ion polymers synthesized by different methods of respectively, solution polymerization, emulsion polymerization and suspention polymerization. The results are that drag reduction polymers on hydrogen bond association with the side chain of12have the best drag reduction, anti-shearing stability of the ion-dipole interaction and coordination complexon of drag reduction ion polymers is better than drag reduction polymers on hydrogen bond association, especially coordination complexon of drag reduction ion polymers, while the drag reduction is less than hydrogen bond polymers; In the course of time, we found the better method to obtain coordination complexon of drag reduction ion polymers is emulsion polymerization.