离子型疏水缔合共聚物的分子复合

 通过丙烯酰胺(AM)/丁基苯乙烯(BST)/2-丙烯酰胺基-2-甲基丙磺酸钠(NaAMPS)阴离子共聚物(PASA)与丙烯酰胺(AM)/ BST/二甲基二烯丙基氯化铵(DMDAAC)阳离子共聚物(PBAD)的分子复合，得到复合型疏水缔合聚合物驱油剂PASA/PBAD。溶液表观黏度测试和AFM结果表明，反电荷的静电相互吸引作用能加强疏水基团的分子间缔合作用，形成流体力学体积巨大的缔合结构，使得当PBAD/ PASA复合聚合物中PBAD质量分数分别为15%和90%时，其质量浓度为2 g/l的水溶液和NaCl溶液（NaCl浓度为1.026 mol / l）的表观黏度分别为3561和227 mPa.s，远高于相同质量浓度PBAD和PASA单组分的水和NaCl溶液的表观黏度。在NaCl浓度更高 (1.710 mol/l)时，PASA/PBAD 的NaCl溶液的表观黏度仍能达到201 mPa.s，显示了其良好的抗盐性。复合聚合物溶液的耐温和抗剪切性能也得到了明显的提高。

INTERMOLECULAR COMPOSITE OF HYDROPHOBICALLY ASSOCIATING IONIC COPOLYMERS

Acrylamide/butyl styrene/ sodium 2-acrylamido-2-methylpropane sulphonate copolymer (PASA) andacrylamide/butyl styrene/dimethyldiallyammonium chloride copolymer (PBAD) were blended to form an intermolecular composite polymer of PBAD/PASA. The solution apparent viscosity and AFM measurements showed that the intermolecular hydrophobic associations were reinforced via electrostatic attraction of opposite charges and the network structures with huge hydrodynamic volume were formed. When the mass fractions of PBAD in PBAD/PASA were 15% and 90%, respectively, the apparent viscosities of the 0.2 g / l aqueous and NaCl solutions (The concentration of NaCl was 1.026 mol / l ) of PBAD/PASA were 3561 mPa.s and 227 mPa.s, respectively, which were greatly higher than that of the aqueous and brine solution of mono-component polymer PBAD and PASA with the same mass concentration. With increasing the NaCl concentration to 1.710 mol / l, the brine solution viscosity of PBAD/PASA was still up to 201 mPa.s, indicating its good salt resistance. The anti-shearing and anti-heating properties of PBAD/PASA composite solution were also obviously improved.