表面活性剂对孪尾缔合聚合物水溶液表观黏度的影响

用黏度法研究了孪尾疏水缔合水溶性聚合物聚（丙烯酰胺／丙烯酸钠／N，N-二己基丙烯酰胺）P（AM／NaAA／DiC6AM）]与十二烷基硫酸钠（SDS）、十六烷基三甲基溴化铵（CRAB）、OP-10的相互作用。结果表明，水溶液的表观黏度随SDS、CTAB质量浓度的增加急剧上升，超过一定浓度后水溶液黏度又急剧下降；黏度上升的幅度随疏水单体用量的增加、表面活性剂与疏水单体的摩尔比率（SMR值）的减小而增大；随水解度的增加，黏度上升的幅度较小。P（AM／NaAA／DiC6AM）的临界缔合浓度cac约为30g/mL，当加入SDS、CTAB时，能显著地降低。随OP-10质量浓度的增加，水溶液表观黏度几乎不变。表明P（AM／NaAA／DRAM）与SDS、CTAB的疏水缔合作用较强，而与OP-10的疏水缔合作用较弱。

Influence of surfactants on viscosity performance of twin- tailed associated terpolymers

The influences of surfactants,sodium dodecyl sulfate(SDS),cetyl trimethyl-ammonium bromide(CTAB)and ethoxy-octylphenol-10(OP-10)on viscosity behavior of twin-tailed hydrophobically associated water soluble terpolymers poly-(acrylamide/sodium acrylate/dihexyl-acrylamide)]were examined.Experimental results showed that the apparent viscosity of the aqueous solution of the terpolymers increases rapidly with increasing concentration of the surfactants SDS as well as CTAB up to a critical value and then decreases with further increasing of the same surfactants.The surfactant OP-10 makes virtually no change on the apparent viscosity of the same solution.The extent of increase of viscosity increases with the increase of content of the hydrophobic monomer in the terpolymers as well as the decrease of mole ratio of the surfactant to the hydrophobic monomer.Following the increase of the content of water soluble monomer(sodium acrylate)in the terpolymer,the apparent viscosity of the terpolymer solution increases but not remarkably.The critical association concentration(cac)of the terpolymer solution is about 30 g/mL.The addition of surfactant SDS or CTAB will decrease the cac significantly.