Dilute solutions have strong hydrodynamic interactions. The Zimm modelworks
well and essntially all the solvent within the pervaded volume ofthe
polymer coil moves with the coil.
The situation is very different foran unentangled polymer melt.
Hydrodynamic interactions are screened andthe Rouse model applies. The Rouse
model will only describe your data at lowfrequency (frequencies below the
reciprocal of the Kuhn monomer time TAU0). But there is always a regime at
higher frequency (motions in
