Investigation on Aqueous Solution Properties of Dendrimer PPI

Aqueous solution properties of dendrimer PPI[Poly (propylene imine)] were studied by measuring viscosity parameters. Particularly on the extremely dilute concentration region were focused on. The adsorption constant k, critical concentration C_s, intrinsic viscosity [η], intermolecular association constant Km and hydrodynamic contact concentration c_s were calculated. And the generation number dependence of these parameters were also studied. From the results, the unique behavior of dendrimer solution was explained preliminary. The adsorption phenomenon of polymer solution is general, and the adsorption theory is also fit for dendrimers. Furthermore, the dynamic contact concentration c_s was determined by a simple viscosity method for the first time.