Small-Angle Neutron Scattering from Viscoelastic Polymer−Clay Solutions
Citations Over TimeTop 1% of 2002 papers
Abstract
The influence of shear on viscoelastic polymer−clay solutions was investigated by means of small-angle neutron scattering (SANS) under shear. SANS was used to measure the shear-induced orientation of polymer and platelets. With increasing shear rate an anisotropic scattering pattern developed. At higher shear rates, the scattering anisotropy increased due to the enhanced orientation of the clay platelets in the shear field. The clay platelets aligned by the flow in an unusual direction, with the surface normal parallel to the vorticity direction. SANS on regular samples (contrast between D2O and solution components) measured the shear-induced orientation of polymer and platelets. However, with contrast matching the orientation of the polymer alone could be detected. With increasing shear rate, clay particles oriented first (SANS on regular samples) and then polymer chains started to stretch (SANS on contrast matched samples). Cessation of shear led to fast recovery, demonstrating the system to be highly elastic.
Related Papers
- → Small-angle neutron scattering on polymer gels: phase behavior, inhomogeneities and deformation mechanisms(2010)224 cited
- → A More Informative Approach for Characterization of Polymer Monolithic Phases: Small Angle Neutron Scattering/Ultrasmall Angle Neutron Scattering(2011)14 cited
- → A Couette shear flow cell for small-angle neutron scattering studies(1990)33 cited
- → Fractal aggregation in silica sols in basic tetraethoxysilane/ethanol/water solutions by small-angle neutron scattering(2020)6 cited
- Small angle neutron scattering study on a polymer blend: characterization of the deformation behavior(1986)