Preparation and evaluation of fluorinated hydrophobically associating polyacrylamide

A twin-tailed fluorinated macro-monomer AMPD was prepared by dodecylamine, POSF and acryloyl chloride. Then the hydrophobically associating copolymers (PFPAM) were prepared by micellar copolymerization of acrylamide (AM) and AMPS with AMPD in an aqueous solution. The structure and composition of PFPAM were characterized by FT-IR, ¹H-NMR, ¹⁹F-NMR and Tg. Macroscopic and microscopic self-assembly associative properties in solutions of PFPAM as well as the effects of salt on the associative behavior were studied via viscosimetry, SEM, surface tension and AFM. The results show that with the polymer concentration increase, the viscosity increased and the surface tension decreased, so as to the salt solution. The concentration corresponding to the onset of increase in the viscosity was close to the onset of decrease in the surface tension. That lead to the CAC values from viscosity measurements are mostly in accordance with the data obtained from surface tension measurements.