Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2003-01-09
Phys. Rev. E 68, 021803 (2003)
Physics
Condensed Matter
Soft Condensed Matter
Scientific paper
10.1103/PhysRevE.68.021803
We use the Random Phase Approximation (RPA) to compute the structure factor, S(q), of a solution of chains interacting through a soft and short range repulsive potential V. Above a threshold polymer concentration, whose magnitude is essentially controlled by the range of the potential, S(q) exhibits a peak whose position depends on the concentration. We take advantage of the close analogy between polymers and wormlike micelles and apply our model, using a Gaussian function for V, to quantitatively analyze experimental small angle neutron scattering profiles of semi-dilute solutions of hairy wormlike micelles. These samples, which consist in surfactant self-assembled flexible cylinders decorated by amphiphilic copolymer, provide indeed an appropriate experimental model system to study the structure of sterically interacting polymer solutions.
Ligoure Christian
Massiera Gladys
Pitard Estelle
Ramos Laurence
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