疏水缔合聚合物减阻剂的合成及流变性能研究

Study on Synthesis and Rheological Properties of Hydrophobic Associated Polymer Drag Reducing Agent

摘要:

采用疏水单体FW-12(丙烯酸十八酯与甲基丙烯酸十六烷基酯混合物，摩尔比2:1)与丙烯酰胺(AM)、丙烯酸（AA）、2-丙烯酰胺基-2-甲基丙磺酸（AMPS）得到水溶性疏水缔合聚合物减阻剂FHAPAM。研究了聚合过程放热特点，摸索出含疏水基团时聚合反应热量变化基本规律，流变仪研究了FHAPAM水溶液的性能；芘探针实验探究了溶液的极性及变化规律；室内减阻实验测试其减阻性能。结果表明：FHAPAM聚合温度变化受疏水单体含量影响较大，存在明显的平台区，FHAPAM水溶液受剪切作用表现出强触变性；溶液极性随疏水单体含量的增加而降低，且I1/I3的比值存在突变点；FHAPAM耐温性强于普通聚丙烯酰胺（PAM）；疏水单体含量不同，储能模量（G'）、损耗模量（G''）均表现出特殊性。FHAPAM低浓度时，减阻效果优于胍胶，表现出了其作为滑溜水压裂液良好前景。

Abstract:

Using hydrophobic monomer FW-12(Octadecyl acrylate/ 2-Propenoicacid,2-methyl-,hexadecylester, molar ratio 2:1) and acrylamide (AM), acrylic acid (AA), 2 - acrylamide - 2 - methyl propane sulfonic acid (AMPS) obtained water-soluble hydrophobic associated polymer drag reducing agent FHAPAM. The paper focuses on exothermic characteristics of polymerization process, explores polymerization reaction heat change basic rule in hydrophobic group, studies hydrophobical association of FHAPAM aqueous solution with rheometer; Pyrene probe experiment explores polarity and change regularity of the solution; discusses drag reduction performance through analysis of drag reduction mechanism. The results show that FHAPAM is greatly impacted by hydrophobic monomer content, polymerization heat is different from ordinary polyacrylamide, with obvious platform area, FHAPAM solution demonstrates strong thixotropy with increased hydrophobic monomer content; Solution polarity decreases with hydrophobic monomer content increase, and there is mutational site in I1/I3 ratio; FHAPAM temperature tolerance is stronger than ordinary polyacrylamide (PAM); for different hydrophobic monomer contents, storage modulus (G') and loss modulus (G") show particularity. When drug-reducing agent FHAPAM remains in low concentration, its drug reduction effect is better than that of guanidine gum, which demonstrates its good prospect for slippery water fracturing fluid.