Accessory for MCR:
Rheo-SANS/SAXS

Accessory for structure analysis and rheo-optics
Small-angle scattering for nanostructure analysis
Temperature range from -50 °C to +300 °C

Rheo-SANS/SAXS

Key features
Compatible instruments
Similar products

Understanding the behavior of complex fluids under flow requires knowledge of structural changes at the microstructural level. Anton Paar offers a specialized measurement setup that combines renowned MCR rheometer technology with instruments for small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS) at X-ray or neutron beamlines. With the Rheo-SANS/SAXS accessory, all rheological test types can be performed simultaneously with real-time small-angle scattering. The accessory includes a radiolucent convection temperature device and specialized measuring systems suitable for all kinds of samples – from liquids and powders to films.

Key features

SAXS and SANS measurements with all rheological test types

The Rheo SANS/SAXS accessory combines a fully functional MCR rheometer with SAXS and SANS for measurements at temperatures from -50 °C up to +300 °C. You can perform all rheological test types with simultaneous and real-time small-angle scattering. Various beam positions with respect to the shear flow provide scattering information at different planes. Available measuring geometries include concentric-cylinder (max. cup diameter 50 mm) and parallel-plate (up to 50 mm diameter) systems made from different materials, as well as DMA and extensional fixtures (SRF, SCF, UXF, and SER).

SAXS meets rheology for shear-induced nanostructure analysis

Small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) are powerful techniques for nanoscale characterization of density differences in materials (e.g., biomaterials, colloids, suspensions, and nanocrystalline polymers). They provide insights into macromolecule size and shape, distances in partially ordered materials, pore sizes, and more. When combined with rheology, SAXS enables the study of shear-induced nanostructure changes – from flow- or temperature-induced crystallization to shear banding. All irradiated parts are made of polycarbonate by default. Other materials (e.g., polyimide) are available on request. Parts can be exchanged in under a minute.

SANS and GISANS: Characterization on the nanoscale

Small-angle neutron scattering (SANS) is a powerful technique for nanoscale characterization of various materials. Neutrons are scattered by nuclei or magnetic moments of unpaired electrons, unlike X-rays, which interact with electron clouds. Because they are electrically neutral, neutrons penetrate deeply and probe the bulk. Rheo-SANS combined with dielectric spectroscopy is also available, as well as a special setup for grazing-incidence SANS (GISANS) or neutron reflectometry to enable thin-film analysis. By default, irradiated parts are made of titanium. Other materials (e.g., quartz glass) are available on request. Parts can be exchanged in under a minute.

Unique measuring technology for complex applications

The unique Rheo-SANS/SAXS setup from Anton Paar is used at facilities around the world where special sources for X-rays (synchrotrons) or neutrons (reactor or spallation source) are available. For extraordinary installation conditions (e.g., limited space in the beamline), special rheometer types can be provided. Individual measurement setups adapted to your specific needs can be implemented on request. Typical applications include the characterization of polymer solutions, melts and films, life science materials, nanoscale structures in colloids, shear banding, the shape and size of macromolecules, partially ordered materials, proteins at physiological conditions, and reaction kinetics.