耐温抗盐AM/AA/AMC_(12)S共聚物的合成及性能评价

Synthesis and performance evaluation of a temperature-resistant and salt-tolerance AM/AA/AMC_(12)S copolymer

以1-十二烯、丙烯腈和发烟硫酸为原料制备了2-丙烯酰胺基十二烷磺酸(AMC12S),在此基础上又以丙烯酰胺(AM)、丙烯酸(AA)和AMC12S为原料合成了水溶性三元共聚物AM/AA/AMC12S。设计了一组正交实验,考察了单体总质量分数、AMC12S含量、引发剂含量、AM∶AA值以及温度等对共聚反应的影响,确定了三元共聚物AM/AA/AMC12S的最佳合成条件为:总单体质量分数为24%、AMC12S质量分数为0.04%、引发剂质量分数为0.1%、AM∶AA=7.0∶3.0、反应温度为40℃。通过红外光谱和扫描电镜对三元共聚物AM/AA/AMC12S进行了表征。讨论了共聚物的黏浓关系、耐温、抗盐等性能。结果表明,共聚物的增粘性远大于HPAM;90℃条件下共聚物的黏度保留率为45.0%,高于HPAM;氯化钠浓度为80 000 mg/L时,黏度保留率为14.6%,氯化镁或氯化钙浓度为2 000 mg/L时,粘度保留率分别为14.4%,12.5%。与部分水解聚丙烯酰胺(HPAM)相比,该共聚物具有良好的耐温抗盐性能。

2-Acrylamidododeeanesulfonic acid was prepared by aerylonitrile, 1-dodecatylene and fuming sul- furic acid,and a water-soluble AM/AA/AMC12S tri-copolymer was synthesized using acrylamide （AM）, a- crylic acid（AA） and AMC12S as raw materials. The reaction conditions were optimized such as the mass fraction of monomer and initiator, the loading of AMC12S and so on. The optimum conditions as follows： to- tal monomer：24% ,AM/AA/AMCj2S ：0.04% ,initiator 0. 1% ,AM： AA =7.0： 3.0, temperature 40 ℃. The copolymer was characterized by FTIR and SEM. Discussed the relationship of viscosity and concentration, the heat and salt resistance and shearing resistance. It was found that eopolymer has better tackify performance than HPAM; the viscosity retention rate of the copolymer was 45.0% （90 ℃ ）, 14.6% （ 80 000 mg/L NaC1） ,14.4% （2 000 mg/L MgC12） ,12.5% （2 000 mg/L CaCI2） ,higher than HPAM. Compared with the hydrolyzed partially polyacrylamide, the eopolymer revealed excellent temperature-resistant and salt-tolerance.