Rod like micellar structures in perfluorinated ionomer solutions

P. Aldebert , B. Dreyfus , G. Gebel , N. Nakamura , M. Pineri , F. Volino

A hexagonal packing of rod like structures is proposed in solutions and gels of a perfluorinated ionomer. The diameter of the rods has been obtained by two different approaches either geometrical from shifts of the interference peak versus concentrations in small angle scattering experiments or direct from analysis of the structure factor in diluted solutions. Consistent results give values between 18 and 31 Å for the radius of the rods, depending on the solvent. The rods have a perfluorinated core with the charges on the surface and the diameter depends on the surface tension rather than on the dielectric constant of the solvent. The structure may result from a balance between elastic and interfacial energies as it is shown by calculations.

Mots clés: colloids; gels; polymer solutions

Domaines: Articles anciens

P. Aldebert, B. Dreyfus, G. Gebel, N. Nakamura, M. Pineri, et al.. Rod like micellar structures in perfluorinated ionomer solutions. Journal de Physique, 1988, 49 (12), pp.2101-2109. ⟨10.1051/jphys:0198800490120210100⟩. ⟨jpa-00210892⟩