Abstract:

The interaction between water-soluble copolymer P(AM/AMPS) and various anionic surfactants, and the related changes in microscopic and macroscopic viscosity were comparatively studied by fluorescence probe and viscosimeter. The results obtained show that the associated complex is formed via the hydrophobic chain interaction at a certain concentration, along with a drastic increase in microscopic and macroscopic viscosity. The surfactants with weaker hydrophobicity, such as SDS as SLS forms a relatively loose complex and possesses a lower microscopic 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 microscopic and macroscopic viscosity. However, as furhter surfactant 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.

Key words: Fluorescence Probe, Viscosity, Complex