共聚物/表面活性剂体系微观与宏观粘度

Study on the Microscopic and Macroscopic Viscosity of Copolymer/Surfactant Systems

The interaction between water-soluble copolymer P(AM/AMPS) and various anionic surfactants, and the related changes in thecroscopic and macroscopic viscosity were comParatively studied by fluorescence probe and viscosimeter. The results obtAned show that the associated complex is formed via the hydrophobic chain interaction at a certain concentration, aong with a drastic increase in Ancroscopic and macroscopic viscosity. The surfactants with wealler hydrophobicity, such as SDS as SLS forms a relatively loose complex and possesses a lower Ancroscopic and macroscoPic viscosity. The other surfactants having a longer hydrocarbon chain and stronger hydrophobicity, such as SBS and SK, display a more tightly packed structure and greater ndcroscopic and macroscopic viscosity.However, as furhter su-rfactant SBS is added, the further intermolecular association results in change of polymer chain conformation from stretch to coiled state and simultaneously decreases in the macroscopic viscosity.