Rheological studies of disperse systems

Viscosity vs. shear rate

Rheology is one of the most informative methods to characterize fluids, complex disperse products, as well as polymers solutions and melts, for industrial, food, domestic usage.

Rheological properties are explored to control the quality of products and raw materials.

Rheological studies allow estimating the process characteristics and choosing optimal power of equipment.

Evaluation of rheological characteristics allows studying the chemical, mechanical and thermal processing, as well as the effects of additives and reactions pathways.

Dynamic viscosity of Newtonian fluids, rheological parameters of non-Newtonian fluids, characteristics of liquids and disperse systems by type of the rheological behavior depending on the shear stress (plastic, dilatant, pseudoplastic) and time (thixotropic, rheopectic) can be determined using a Rheotest 2.1 rotary viscometer. It is possible to simulate conditions reflecting  technological processes at the viscosity range of 8-4×108 mPa•s and temperature 10-90 °C .

Study of the rheological properties

Determination of

dependence of the effective viscosity on a shear rate value;

effective viscosity dependence on time at a constant shear rate;

concentration dependence for solutions and suspensions.

Rheological study:

- suspensions – paints, varnishes, enamel slips;

- emulsions – latexes, cosmetics, drilling muds, edible emulsions;

oils – edible oils, engine oils, liquid fuels;

- pastes – chocolate pastes, fruit purees, toothpastes, shoe polishes;

- solutions – aqueous solutions, resins, synthetic solutions.

Provider: Chuiko Institute of Surface Chemistry (CISC) of National Academy of Sciences of Ukraine

Kyiv, Ukraine: Tel.: + 38 (044) 422 96 43; Fax: + 38 (044) 424 35 67; e-mail: iscgoncharuk@meta.ua