Centre of Collective Using "Progress"

Educational and research laboratory (ERL)
of physical and chemical researches of solutions and disperse systems

The equipment: Rotational viscometer Brookfield RVDV-II Pro

Viscometer Brookfield RVDV-II Pro (manufacture Brookfield Engineering Labs., Inc., the USA), year of release – 2009.

Rotational viscometer Brookfield RVDV-II Pro is intended for measurement of dynamic viscosity (in сПз or мПа*с) materials in a liquid modular condition. Thanks to use of additional completing a range of measured viscosity is in limits of 3,23 … 100 000 000 сПз (мПа*с), a range of temperature of the investigated sample is from Tokr 10°С to 100°С.

Technical possibilities:

• Continuous reading and display of the data:
  - Viscosity (mPа*с, sPz);
  - Speed (rpm);
  - Speed of shift (1/sec);
  - A twisting moment (%);
  - Temperature (С);
  - Efforts of shift (N/m)
• The choice of an optimum range of measurement of viscosity/shift is provided with presence of 54 speeds.
• Accuracy ±1,0 % of the top limit of measurement range.
• Reproducibility of measurement of viscosity ±2,0 %.
• Volume of the measured sample of 500 sm3.

In a base complete set model Brookfield RVDV-II Pro is intended for measurement of average viscosity. A range of values of dynamic viscosity is from 100 to 40 000 000 сПз (мПа*с).

Additional accessories allow to expand a circle of research objects, and also to change conditions of viscosity measurement.

Additional accessories to viscometer Brookfield RVDV-II Pro:

• Thermostat LOIP LT-108a allows to termostate the sample in a range of temperatures from Tokr 10 to 100 С (accuracy of maintenance of temperature ±0,1 С).
• Adapter for small samples SSA. Volume of test of 13 sm3. A range of measured viscosity is in limits from 500 to 10 000 000 сПз (мПа*с).
• Adapter for low viscosity UL allows to measure viscosity in a range of 3,23-2000 сПз (мПа*с). Volume of investigated test of 16 sm3.
• Rack of spiral movement Heli-path is used for viscosity measurement / gels consistencies, pastes, creams, mastics, gelatin and other not fluid substances. A range of values of viscosity is from 2 000 to 100 000 000 сПз (мПа*с).

The software for viscometer RVDV-II Pro Wingather

The given program allows to carry out data gathering in the form of tables, constructions of schedules for this data and creation of continuous records of tests for the analysis. The program carries out current plotting , schedules of dependence of viscosity from time, temperature, speed of shift and pressure of shift. For comparison of properties it is possible to construct and impose against each other six data sets. Calculation of fluidity limits according to models of Bingman, Caisson, Ostvald is possible. The data can be kept as Wingather file or to export to format Excel.

Scope: measurement of dynamic viscosity of glues, asphalt, suspensions of ceramics, creams, dairy and foodstuff, pitches, organic pastes, paints, pulps, starches, tooth-pastes, paints, ink …

By means of rotational viscometer RVDV-II Pro (at use of additional accessories) it is possible to receive hollow rheological curve currents of a wide range of disperse systems. Such curves bear the greatest information for establishment of laws of formation, preservation conditions of stability and, on the contrary, destruction of structures in the concentrated disperse systems. This information is necessary for the decision of problems in perspective area of researches such as engineering rheology.

The given model of viscometer can be used for definition of dynamic viscosity of transmition oils and black oils in accordance with GOST 1929-87 «Oil products. Methods of definition of dynamic viscosity on rotational viscometer».

Rendered services:

• Definition of dynamic viscosity of various materials;
• The comparative analysis of rheological properties of products (to 6);
• Definition of dependence of viscosity from time, temperatures, speeds of shift and pressure of shift;
• Construction of continuous curves of a current (rheogram);
• Mathematical modelling for calculations of fluidity limit (analysis Bingham Plastic, Casson, Power Law, IPC Paste).

Personnel structure:

• Engineer - Krupennikova Victoria Evgenvena
• Engineer – Medvedeva Elena Gennadievna