ASTM E 2070 Standard Test Method for Kinetic Parameters by Differential Scanning Calorimetry Using Isothermal Methods
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ASTM E 2070 Document Information:
Title
Standard Test Method for Kinetic Parameters by Differential Scanning Calorimetry Using Isothermal Methods
ASTM International
Publication Date:
Feb 1, 2008
Scope:
Test Method A determines kinetic parameters for activation
energy, pre-exponential factor and reaction order using
differential scanning calorimetry from a series of isothermal
experiments over a small (; 10 K) temperature range. This treatment
is applicable to low nth order reactions and to autocatalyzed
reactions such as thermoset curing or pyrotechnic reactions and
crystallization transformations in the temperature range from 300
to 900 K (30 to 630 °C). This test method is applicable only to
these types of exothermic reactions when the thermal curves do not
exhibit shoulders, discontinuities or shifts in baseline.
Test Method B also determines the activation energy of a set of
time-to-event and isothermal temperature data generated by this or
other procedures.
Test Method C determines the activation energy and initial heat
flow from a series of isothermal experiments over a small
temperature range. Because this approach only determines kinetic
parameter of activation energy, no knowledge of the kinetic model
is required. Therefore it is considered to be "model free". This
approach is broadly applicable to a variety of complicated
reactions including those not well understood.
SI units are the standard.
This test method is similar but not equivalent to ISO 11357,
Part 5, and provides more information than the ISO standard.
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. Specific precautionary statements
are given in Section 8.
Keywords:
- activation energy
- autocatalytic reactions
- crystallization
- reactions
- differential scanning calorimetry (DSC)
- frequency
- factor
- kinetics
- nth order reactions
- pre-exponential
- factor
- reactions
- thermal analysis
- thermoset cure
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