Small angle neutron scattering studies of liquid systems in nonequilibrium

Neutron scattering experiments in nonequilibrium will be illustrated with two typical examples from the field of polymer and colloid science. In particular, the coil deformation of single, flexible polystyrene molecules in laminar shear flow and the shear induced demixing behaviour of polystyrene in a theta solution has been quantitatively investigated by this method. A turbulent flow experiment, on the other hand, revealed structural evidence of the orientation of rodlike micellar additives under turbulent, drag reduced pipe flow conditions.