丙烯酰胺/甲基丙烯酰氧乙基二甲基丙磺酸铵共聚物的合成及其性能

Synthesis and Properties of Acrylamide/Methyl Acryloyl Oxygen Ethyl Dimethyl Ammonium Propyl Sulfonic Acid Copolymer

以二甲氨基乙醇和丙烯酰氯为原料,制得丙烯酸二甲胺乙酯(DMAEA);DMAEA与1,3-丙磺内酯反应制得甜菜碱型乙烯基两性离子单体——甲基丙烯酰氧乙基二甲基丙磺酸铵(MSBM);MSBM与50%丙烯酰胺水溶液共聚合成了两性聚合物丙烯酰胺/甲基丙烯酰氧乙基二甲基丙磺酸铵(AM/MSBM),其结构经~1H NMR和IR确证。研究了矿化度,剪切作用和温度对AM/MSBM粘度的影响。结果表明:AM/MSBM具有反聚电解质溶液行为。在实验条件(盐水矿化度1 075.9 mg·L^(-1),温度45~75℃,剪切速率2 000 rpm)下,AM/MSBM的粘度保持率>90%。模拟驱油实验结果表明,AM/MSBM可提高采收率13.2%。

Ethyl acrylate dimethylamine （DMAEA） was obtained using dimethylaminoethanol and acryloyl chloride as the raw materials. Then a betaine type vinyl zwitterionic monomer, methyl acryloyl oxygen ethyl dimethyl ammonium propyl sulfonic acid （MSBM） , was prepared by the reaction of DMAEA with 1,3-propyl sulfonic lactone. Copolymer AM/MSBM was synthesized by copolymerization of 50% acrylamide solution with MSBM. The structure was confirmed by ~ H NMR and IR. Effects of the examines salinity, shear effect and temperature on the viscosity of AM/MSBM were investigated. The results indicated that AM/MSBM exhibited anti-polyelectrolyte solution behavior. Under the experiment conditions （salinity of 1 075.9 mg·L-2,45 - 75℃, shear rate of 2 000 rpm）, the viscosity of AM/MSBM remains above 90%. The imitation oil recovery experiment results showed that AM/MSBM can promote recovery rate with 13.2%.