Computer Controlled Torque Rheostat Tester

Meet the standard:

ASTM D2538 

ISO 305 

Product Introduction:

The Computer Controlled Torque Rheostat Tester simulates industrial mixing and processing operations on a laboratory scale.4 A material sample is introduced into a heated chamber containing rotating blades (rotors) driven by a motor at a controlled speed. As the material is mixed or processed, it resists the motion of the rotors, generating a torque. A sensitive torque transducer measures this torque in real-time. The instrument's computer control system precisely regulates the chamber temperature and rotor speed according to a programmed test profile. The resulting data is typically presented as a torque-time curve, which provides valuable insights into various stages of material behavior, such as melting, fusion, plasticization, degradation, and curing. By analyzing the torque profile, material scientists and process engineers can evaluate factors like processability, thermal stability, shear sensitivity, and the effects of additives.

The instrument is widely used in:

Polymer research and development for characterizing new materials and formulations.5

Quality control of raw materials and compounded products in the plastics, rubber, and chemical industries.

Optimization of processing conditions (temperature, shear rate, mixing time).

Study of material degradation and stabilization.

Evaluation of pigments, fillers, and other additives on processing behavior.

Product Advantages:

Characterizes Material Processability: Provides direct measurement of how materials behave during mixing and processing under controlled conditions.

Evaluates Thermal and Shear Stability: Helps determine a material's resistance to degradation under heat and mechanical stress.

Simulates Industrial Processes: Replicates key aspects of industrial mixing, extrusion, and other processing operations on a laboratory scale.6

Objective and Quantitative Data: Generates precise torque-time curves and other data for analysis and comparison.

Computer Controlled Precision: Automated control of temperature, speed, and test duration ensures high repeatability and accuracy.

Versatile for Various Materials: Applicable to a wide range of polymers, elastomers, ceramics, food products, and other materials that undergo viscous processing.

Supports R&D and Quality Control: Essential tool for material development, formulation optimization, and ensuring consistent product quality.

Identifies Material Behavior Stages: The torque curve clearly shows different phases of material transformation during processing (e.g., melting point, fusion time, degradation onset).