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将十八烷基-二甲基甲代烯丙基氯化铵(C18DMMAAC)作为疏水单体,与丙烯酸(AA)、丙烯酰胺(AM)在水溶液中通过自由基聚合得到疏水缔合聚合物HAPAM-18,通过1HNMR和红外光谱对其结构进行了表征。最佳的聚合反应条件为:n(AM)∶n(AA)∶n(C18DMMAAC)=74.94∶25∶0.06,AA的摩尔中和度为95%,单体总质量分数为20%,引发剂质量分数为0.05%(以单体总质量计),温度45℃,反应时间12 h。研究表明,聚合物溶液的临界缔合质量浓度为2 g/L;聚合物溶液对温度较为敏感,80℃时黏度保留率为70.93%;聚合物溶液仍为剪切变稀的假塑性流体,但表现出良好的抗剪切性能,剪切1 h后黏度保留率达115%;由于设计为含较多阴离子的聚合物,该聚合物的抗盐性较差。
The octadecyl-dimethylmethallyl ammonium chloride (C18DMMAAC) was used as a hydrophobic monomer to obtain the hydrophobically associating polymer HAPAM by radical polymerization in aqueous solution with acrylic acid (AA) and acrylamide (AM) -18, its structure was characterized by 1HNMR and IR spectra. The optimum polymerization conditions were as follows: n (AM): n (AA): n (C18DMMAAC) = 74.94:25:0.06, molar neutralization degree of AA was 95%, total monomer content was 20% Mass fraction of 0.05% (based on the total mass of monomer), temperature 45 ℃, reaction time 12 h. The results show that the critical mass concentration of polymer solution is 2 g / L. The polymer solution is sensitive to temperature and the viscosity retention rate is 70.93% at 80 ℃. The polymer solution is still pseudoplastic fluid with shear thinning, But exhibited good shear resistance with a viscosity retention of 115% after 1 h of shear; the polymer was less salt tolerant due to the polymer designed to contain more anions.