资料分类:仪器综述
适合人群:所有
资料简介:The Interfacial Rheology System combines the outstanding and
well-established properties of a Physica MCR rheometer with a newly
developed interfacial rheology cell based on a bi-cone geometry.
This bi-conical disk rheometer allows the measurements of steady state and
transient interfacial shear viscosities as well as elasticity
properties of interfacial films and layers. The use of a research rheometer
extends the range of standard rheological test methods like flow curve,
creep and creep recovery, stress relaxation or oscillatory measurements
which are common in three-dimensional bulk rheology to the rheology
of two-dimensional interfaces. The sensitivity of the Physica MCR rheometer
at low torques gives the opportunity to investigate interfacial films with
very low viscosities. It even extends the application range of the biconical
geometry, which was thought to be exclusively for measurements at
liquid/liquid interfaces, to rheological experiments on layers at the
air/water interface. The influence of the bulk phase contribution is taken
care of by a full hydro-dynamical analysis of the flow field for a bi-cone
geometry allowing a quantitative determination of the relevant
interfacial rheological properties.