Dynamics of polymers in elongational flow investigated by inelastic neutron scattering
Fluid Dynamics
2011-06-16 v1
Abstract
The nanoscale fluctuation dynamics of semi dilute high molecular weight polymer solutions of Polyethylenoxide (PEO) in D2O under non-equilibrium flow conditions were studied by the neutron spin-echo technique. The sample cell was in contraction flow geometry and provided a pressure driven flow with a high elongational component that stretched the polymers most efficiently. The experiments suggest that the mobility on the scale of a few monomers, comparable to the Kuhn segment length, becomes highly anisotropic and is enhanced perpendicular to the flow direction. Diffraction data show a weak structural correlation along the chains on a length scale of about 17 Angstroems, which might be related to the Kuhn length in this system.
Cite
@article{arxiv.0809.3041,
title = {Dynamics of polymers in elongational flow investigated by inelastic neutron scattering},
author = {Maikel C. Rheinstadter and Rainer Sattler and Wolfgang Haeussler and Christian Wagner},
journal= {arXiv preprint arXiv:0809.3041},
year = {2011}
}