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

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%。

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

Ethyl acrylate dimethylamine( DMAEA) was obtained using dimethylaminoethanol and acry-loyl chloride as the raw materials. Then a betaine type vinyl zwitterionic monomer, methyl acryloyl ox-ygen 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 1 H NMR and IR. Effects of the exam-ines 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 condi-tions(salinity of 1075. 9 mg·L-1, 45~75℃, shear rate of 2000 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%.