ASTM E1641 Thermal Decomposition Kinetics Testing by DSC/TGA
ASTM E1641-13 test method determines the decomposition kinetics by thermogravimetry using the Ozawa/Flynn/Wall Method. ASTM E1641-13 test method calculates thermal endurance. Apparatus used to perform this test method are thermobalance, temperature controller, recording device, containers (pans, crucibles) inert to the specimen, and high-purity (99.99 %) nitrogen supply for purge gas.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM E1641-13 provides a test method for determining the decomposition kinetics of materials using thermogravimetric analysis (TGA) and the Ozawa/Flynn/Wall (OFW) method. This approach evaluates how materials decompose as a function of temperature without requiring a predefined reaction model.
The standard is widely used for polymers, chemicals, and materials to estimate activation energy and understand thermal stability and degradation behavior.
Scope, Applications, and Benefits
Scope
ASTM E1641-13 focuses on determining kinetic parameters such as activation energy by analyzing weight loss at different heating rates. It ensures accurate assessment of thermal decomposition behavior.
The test evaluates:
- Activation energy of decomposition
- Thermal degradation behavior
- Weight loss vs temperature
- Reaction kinetics
- Material stability
Applications
- Polymer and plastic materials
- Chemical and pharmaceutical compounds
- Coatings and composites
- Thermal stability studies
- Research and quality control laboratories
Benefits
- Provides model-free kinetic analysis
- Improves understanding of material stability
- Supports product development
- Enables prediction of material lifetime
- Allows comparison of materials
Test Process
Sample Preparation
Small sample is weighed and placed in TGA pan.
1Multi-Rate Heating
Sample is heated at multiple heating rates.
2Weight Loss Measurement
Mass loss is recorded as a function of temperature.
3Data Recording & Evaluation
Activation energy is calculated using OFW method.
4Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | Polymers, chemicals, composites |
| Heating Rates | Typically 5, 10, 15, 20°C/min |
| Temperature Range | Typically ambient to 600°C or higher |
| Atmosphere | Nitrogen or air |
| Measured Outputs | Activation energy (kJ/mol), weight loss (%) |
Instrumentation Used for Testing
- Thermogravimetric analyzer (TGA)
- Temperature control system
- Gas supply (nitrogen or air)
- Microbalance
- Sample pans
- Data acquisition system
Results and Deliverables
- Activation energy values
- Decomposition kinetics analysis
- Weight loss curves
- Thermal stability assessment
- Test condition summary
- ASTM compliance report
Why Choose Infinita Lab for ASTM E1641-13?
Infinita Lab is a trusted USA-based testing laboratory offering ASTM E1641-13 testing services across an extensive network of accredited facilities across the USA.
Infinita Lab is built to serve the full spectrum of modern testing needs—across industries, materials, and methodologies. Our advanced equipment and expert professionals deliver highly accurate and prompt test results, helping businesses achieve quality compliance and product reliability.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
ASTM E1641-13 is a standard test method used to determine decomposition kinetics of materials using thermogravimetry and the Ozawa/Flynn/Wall method under varying heating rates.
ASTM E1641-13 is important because it helps predict material lifetime, stability, and performance by analyzing how materials decompose under different temperature conditions.
ASTM E1641-13 uses thermogravimetric analysis at multiple heating rates to calculate activation energy without assuming reaction mechanisms, applying the Ozawa/Flynn/Wall method.
ASTM E1641-13 requires a thermogravimetric analyzer, controlled heating system, inert or reactive gas environment, and data analysis tools to evaluate weight loss behavior.
Results are reported as activation energy and kinetic parameters, helping predict decomposition rates and thermal stability of materials under various conditions.
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