Confined polymer dynamics on clay platelets.
The structure and dynamics of poly(ethylene oxide) adsorbed on dispersed clay platelets are investigated by small-angle neutron scattering and neutron spin-echo spectroscopy. The intermediate scattering function has a mobile contribution described by the Zimm theory and an immobile contribution that is constant within the time window. The immobile fraction as a function of the scattering vector Q is described by a Lorentz function, from which a localization length is determined. The relaxation rates grow with polymer concentration in agreement with dielectric measurements but contrary to pure polymer gels.
Institute of Solid State Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
Xiuli
X
Frielinghaus
Martin
M
Brodeck
Olaf
O
Holderer
Henrich
H
Frielinghaus