文章摘要
缔合型交联剂对多元共聚物流变特性影响
Effect of Associative Crosslinking Agent on Rheological Properties of Multiple Copolymer
投稿时间:2019-05-29  修订日期:2019-07-08
DOI:
中文关键词: 缔合聚合物压裂液  表面活性剂  黏弹性  触变性  蠕变性  本构方程
英文关键词: Associated polymer fracturing fluid  Surfactant  Viscoelasticity  Thixotropy  Creep  Constitutive equation.
基金项目:
作者单位E-mail
刘通义 西南石油大学 812529711@qq.com 
王锰 西南石油大学  
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中文摘要:
      用丙烯酰胺(AM)、丙烯酰氧乙基三甲基氯化铵(DAC)、2-丙烯酰胺-2甲基丙磺酸(AMPS)与十二烷基二甲基烯丙基氯化铵以水溶液聚合的方法合成了两亲性高分子聚合物ZW-12。使用十八烷基二羟乙基甜菜碱作为缔合型交联剂M-1,通过RS6000型流变仪研究了不同浓度M-1对ZW-12溶液流变性能的影响,并采用扫描电镜观察了流体的介观结构。结果表明复配体系的触变性能与蠕变性能均在M-1浓度达到ZW-12质量浓度的0.30%后发生了较大变化,触变实验表现为应力过冲现象的产生以及触变环面积的大幅增加,蠕变实验采用Burger模型进行拟合后也发现M-1相对浓度大于0.30%后,Maxwell弹簧模量G0增大至0.51Pa。SEM图验证了该浓度前后流体结构发生变化的推论。通过Cross方程与Jeffery模型对各M-1浓度下流体黏切曲线的拟合,确定了M-1对流体黏度与模量的共同影响造成其非牛顿行为的变化。
英文摘要:
      Amphiphilic polymer ZW-12 was synthesized by aqueous solution polymerization of acrylamide(AM), acryloxyethyl trimethylammonium chloride (DAC), 2-acrylamide-2methyl propanesulfonic acid (AMPS) and dodecyl dimethyl allyl ammonium chloride. Using octadecyl dihydroxyethyl betaine as associating crosslinking agent M-1. The effect of different concentration of M-1 on the rheological properties of ZW-12 solution was studied by RS6000 rheometer with hydrophobic associating polymer ZW-12 and surfactant M-1andthe microstructure of the fluid was observed by sem. The results showed that both the thixotropic and creep properties of the composite system changed significantly after the concentration of M-1 reached 0.30%. The thixotropic experiment showed the generation of stress overwash and the large increase of the area of thixotropic ring. Burger model was used to fit the creep experiment, and it was also found that when the concentration of M-1 was greater than 0.30%, the Maxwell spring modulus G0 increased significantly. Scanning electron microscopy verified the inference that the fluid structure changed before and after 0.30% concentration. Cross equation and Jeffery model were used to fit the viscosity and shear curves of the fluid at different concentrations of M-1, and it was determined that the combined influence of M-1 on the viscosity and modulus of the fluid resulted in the change of its non-newtonian behavior.
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