AM/AMPS/DMDB/MPEGA抗温耐盐四元共聚表面活性聚合物的合成及性能评价

SYNTHESIS AND PERFORMANCE EVALUATION TEST OF AM/AMPS/DMDB/MPEGA QUATERNARY SURFACE-ACTIVE POLYMER WITH TEMPERATURE-RESISTANT AND SALT-TOLERANT

在氧化还原/水溶性偶氮复合引发体系中采用自由基共聚法,以丙烯酰胺(AM)、甲基丙烯酸二甲氨基乙酯-十二烷基溴(DMDB)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、甲氧基聚乙二醇丙烯酸酯(MPEGA)为原料,制备AM/AMPS/DMDB/MPEGA抗温耐盐的表面活性聚合物。采用红外光谱和核磁氢谱评价了聚合物溶液的耐温抗盐性、耐剪切性、抗老化性等性质。结果表明:该聚合物具有较好的耐温抗盐性,耐剪切和抗老化性也均优于中分聚丙烯酰胺(HPAM);乳化性评价和界面张力测试证明该聚合物具有一定乳化性和降低界面张力的能力;在动态黏弹性测定中,聚合物溶液存在黏性和弹性的特点。岩芯驱油实验结果表明,合成的表面活性聚合物驱油效率为11%,高于单一聚合物(HPAM)驱油效率的8.5%,略低于聚/表二元复配体系(HPAM/SDBS)的12.1%,在高温高盐的环境中具有一定的提高采收率的能力,为表面活性聚合物的合成和应用提供了理论参考。

The AM/AMPS/DMDB/MPEGA surface-active polymer was prepared by using acrylamide(AM),dimethylaminoethyl methacrylate-dodecyl bromide(DMDB),2-acrylamide-2-methyl-propionic acid(AMPS)and methoxy polyethylene glycol acrylate(MPEGA)through free radical polymerizationin redox/azo complex initiation system.The structure was analyzed by IR and 1H NMR spectroscopy and the series property of polymer solution such as temperature and salt resistance,shear resistance and aging resistancewere evaluated.The experimental results show that the polymer has better temperature and salt resistance,the shear resistance and aging resistance propertiesalso better than intermediate polyacrylamide(HPAM).The interfacial tension of the polymer was measured and its emulsification and viscoelasticity were tested.The results showed thatthe polymer has certain emulsification and the ability to reduce interfacial tension.In dynamic viscoelastic measurement,polymer solution has the characteristics of viscosity and elasticity.The oil displacement experiment results show that the oil displacement efficiency of the synthesized surface-active polymer was 11%,which was higher than that of the single polymer flooding(HPAM)8.5%,slightly less than 12.1%of the polyer-surfactant system(HPAM/SDBS).It has the ability to enhance the recoveryin the high temperature and high salt environment,which provides a theoretical reference for the synthesis and application of surfactant polymers.