The RPA rotational is GÖTTFERT’s flagship Rubber Process Analyzer. In addition to dynamic viscosity, it can determine shear viscosity through continuous rotational measurements.
Elastomer-Testing instrument RPA rotational
Thanks to its innovative rotational measurement method, the RPA rotational can measure both the transient and steady-state shear viscosity of test materials. Steady-state shear viscosity is usually determined using capillary rheometers. It not only enables complex material behavior to be represented under realistic processing conditions at high shear rates but also provides data that are essential for simulating and designing rubber processing operations.
Fast, intensive shearing processes inevitably cause a significant increase in material temperature due to shear dissipation. Thanks to its unique gradient temperature sensor, the RPA rotational can identify, quantify and correct this often significant disturbance. This feature is unique in the market and enables robust, reliable shear viscosity measurements even at high shear rates.
Good to know
The RPA rotational is GÖTTFERT’s most versatile RPA and one of the most advanced instruments on the market. Its combination of continuous rotation and dissipation correction is unique. This enables it to measure reliable, corrected shear viscosities comparable to those obtained with a capillary rheometer.
Specification
Measuring methods
for even more functionality
RPA rotational - Part 1
How continuous rotational measurements can be performed easily and corrected for dissipation
RPA rotational - Part 2
What about the advantages of continuous rotational measurements compared with oscillatory measurements?
RPA rotational - Part 3
How the RPA rotational uses its dissipation correction to characterize scorch problems, among other effects, and enable new solution concepts?
Storage and loss modulus
The storage modulus (G`) measures the energy which is stored in the sample and which will be released after mechanical stress...
Payne-Effect
The Payne-effect describes the alteration in the polymer properties, which are caused of mechanical stress...
Variable time
Comparable with the usual vulcameter test here the module and the viscosity via the time are being captured...
Rubber Process Analyzer (RPA-VE)
Characterization of rubber compounds in the plasticized state
