ASTM-E698 1999

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E698-99 Standard Test Method for Arrhenius Kinetic Constants for Thermally Unstable Materials

Published By	Publication Date	Number of Pages
ASTM	1999	7

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Description

1.1 This method covers the determination of the overall kinetic parameters for exothermic reactions.

1.2 The kinetic parameters are obtained from differential scanning calorimetry (DSC) curves (see Section 3).

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

1.4 Limitations There are cases where this technique is not applicable. Limitations may be indicated by curves departing from a straight line (see 11.2) 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.

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

Additional information

Standard Title	E698-99 Standard Test Method for Arrhenius Kinetic Constants for Thermally Unstable Materials
Published Code	ASTM
Publication Date	1999
Pages Count	7

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ASTM-E698 1999

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