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Rheology

Rheology testing is essential for understanding how rubber compounds behave during processing and in their final applications. At CMG, we provide expert MDR and ODR testing services to help optimize formulations, enhance processes, and ensure consistent product quality.

Why Rheology Testing Matters
Rheology testing delivers key insights into the flow and curing behavior of rubber compounds, supporting:

  • Quality Control: Detecting raw material inconsistencies.
  • Process Optimization: Improving curing cycles and efficiency.
  • Product Development: Ensuring desired performance characteristics.
  • Failure Analysis: Identifying issues related to under- or over-curing.

Testing Standards

  • ASTM D2084 (ODR): Standard Test Method for Rubber Property—Vulcanization Using the Oscillating Disk Cure Meter
    This method evaluates the vulcanization behavior of rubber compounds by measuring torque resistance during the curing process
  • ASTM D5289 (MDR): Standard Test Method for Rubber Property—Vulcanization Using the Moving Die Rheometer
    This advanced method offers precise control over test conditions and provides more detailed insights into cure kinetics compared to ODR.

Key Rheological Properties Measured

  • Minimum Torque (ML): Represents the material’s viscosity before vulcanization.
  • Maximum Torque (MH): Indicates the stiffness of the fully cured rubber.
  • Scorch Time (ts2): Time taken for the onset of vulcanization, important for processing safety.
  • Optimal Cure Time (t90): Time to reach 90% of the maximum torque, guiding production cure cycles.
  • Cure Rate Index (CRI): A measure of how quickly the rubber compound cures.

Advanced Testing Capabilities
CMG offers:

  • Variable temperature analysis for real-world conditions.
  • Cross-linking analysis for diverse materials.
  • Custom protocols for specific R&D and quality needs.
  • Data support for flow simulation modeling.

Partner with CMG for Reliable Rheology Testing
With expert analysis, calibrated equipment, and fast turnaround times, CMG provides actionable insights to optimize your rubber formulations and processes. Contact us today to discuss your testing needs.