ASTM-E698 2005

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E698-05 Standard Test Method for Arrhenius Kinetic Constants for Thermally Unstable Materials

Published By	Publication Date	Number of Pages
ASTM	2005	8

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Description

1.1 This method covers the determination of the overall kinetic parameters for exothermic reactions using the Flynn/Wall/Ozawa method and differential scanning calorimetry.

1.2 This technique is applicable to reactions whose behavior can be described by the Arrhenius equation and the general rate law.

1.3 LimitationsThere are cases where this technique is not applicable. Limitations may be indicated by curves departing from a straight line (see ) or the isothermal aging test not closely agreeing with the results predicted by the calculated kinetic values. In particular, this method is not applicable to reactions that are partially inhibited. The technique may not work with reactions that include simultaneous or consecutive reaction steps. This method may not apply to materials that undergo phase transitions if the reaction rate is significant at the transition temperature.

1.4 SI units are the standard.

This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method
2	Significance and Use Apparatus Safety Precautions Sampling Calibration
3	Procedure Calculation FIG. 1 FIG. 2
4	Report Precision Keywords
5	X1. TYPICAL PEAK TEMPERATURE CORRECTIONS X1.1 Significance X1.2 Heating Rate Corrections X1.3 Thermal Lag Correction FIG. X1.1 TABLE X1.1
6	X2. EXAMPLE FOR CALCULATION OF ACTIVATION ENERGIES X2.1 X2.2 X2.3 X2.4 X2.5 X2.6 FIG. X1.2
7	X3. ALTERNATIVE METHOD FOR CALCULATING ACTIVATION ENERGIES ( X3.1 X3.2 X3.3 X3.4 TABLE X2.1
8	X4. EXAMPLE OF CALCULATIONS FOR ISOTHERMAL TEST X4.1 X4.2 X4.3 X4.4 REFERENCES

Additional information

Standard Title	E698-05 Standard Test Method for Arrhenius Kinetic Constants for Thermally Unstable Materials
Published Code	ASTM
Publication Date	2005
Pages Count	8

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ASTM-E698 2005

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