本文采用电导法研究聚丙烯酰胺(PAM)与十二烷基磺酸钠(SDS)的相互作用。发现在NaCl溶液中,PAM与SDS形成络合物;而在纯水中却观察不到络合物的形成。不论在纯水中或在NaCl溶液中,当形成SDS的正常胶束后,PAM的存在可使胶束的解离度降低。由此推论:PAM与SDS的相互作用可能有两种机理,一种是在NaCl溶液中,当SDS浓度较小时,SDS分子以疏水作用结合在PAM链上,形成络合物;一种是当SDS形成正常胶束后,PAM吸附于胶束“表面”,导致胶束解离度降低。 In this paper, the interaction between polyacrylamide (PAM) and sodium dodecyl sulfate (SDS) was studied by conductivity method. It was found that PAM formed a complex with SDS in NaCl solution; however, the formation of complex was not observed in pure water. Whether in pure water or in NaCl solution, the presence of PAM reduces the micellar dissociation when forming normal micelles of SDS. Therefore, we conclude that the interaction between PAM and SDS may have two mechanisms. One is that in the NaCl solution, when the SDS concentration is small, the SDS molecule is hydrophobic to bind to the PAM chain to form a complex; one is when After the SDS forms a normal micelle, the PAM adsorbs to the “surface” of the micelle, resulting in a decrease in the degree of micelle dissociation.