Slow dynamics features in aqueous solutions of high molecular weight Poly(Ethylene Oxide)

摘要: In this contribution results of Photon Correlation Spectroscopy measurements on aqueous solutions high molecular weight Poly(Ethylene Oxide) in the semidilute regime are reported. They clearly reveal existence two distinct k2-dependent processes far different time scales: a collective diffusion process at short times and slow dynamics long times. The experimental findings suggest that is likely due to formation “clusters” which crucially depends, besides fact overlap concentration reached, polymer main chain length.