Standard Test Method for Determination of Kinetic Parameters and Reaction Order for Thermally Unstable Materials by Differential Scanning Calorimetry Using the Kissinger and Farjas Methods
用Kissinger法和Farjas法用差示扫描量热法测定热不稳定材料的动力学参数和反应级数的标准试验方法
发布日期:
2021-10-01
1.1
本试验方法描述了使用基辛格可变加热速率iso转换法测定阿累尼乌斯活化能和指数前因子的动力学参数
(
1.
,
2.
)
2.
和活化能和反应级数
(
3.
)
对于热不稳定材料。本试验方法适用于300 K至900 K(27°C至627°C)的温度范围。
1.2
二者都
n
该方法在0范围内处理了th级反应和加速反应。
5 <
n
<4和1<
p
<4,其中
n
是
n
th阶反应阶和
p
是Avrami反应顺序
(
4.
)
. 反应级数
n
和
p
由Farjas方法确定
(
3.
)
.
1.3
本试验方法使用与试验方法相同的实验条件
E698
. Flynn/Wall/Ozawa试验方法的数据处理
E698
可以同时应用于这些实验结果。
1.4
以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。
1.5
本标准并非旨在解决与其使用相关的所有安全问题(如有)。本标准的用户有责任在使用前制定适当的安全、健康和环境实践,并确定监管限制的适用性。
1.6
本国际标准是根据世界贸易组织技术性贸易壁垒(TBT)委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。
====意义和用途======
6.1
该测试方法有助于研发、质量保证、法规遵从性和基于规范的验收。
6.2
根据实践,用该方法确定的动力学参数可用于计算热危险优值
E1231
.
1.1
This test method describes the determination of the kinetic parameters of Arrhenius activation energy and pre-exponential factor using the Kissinger variable heating rate iso-conversion method
(
1
,
2
)
2
and activation energy and reaction order by the Farjas method
(
3
)
for thermally unstable materials. The test method is applicable to the temperature range from 300 K to 900 K (27 °C to 627 °C).
1.2
Both
n
th order and accelerating reactions are addressed by this method over the range of 0.5 <
n
< 4 and 1 <
p
< 4 where
n
is the
n
th order reaction order and
p
is the Avrami reaction order
(
4
)
. Reaction orders
n
and
p
are determined by the Farjas method
(
3
)
.
1.3
This test method uses the same experimental conditions as Test Method
E698
. The Flynn/Wall/Ozawa data treatment of Test Method
E698
may be simultaneously applied to these experimental results.
1.4
The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
====== Significance And Use ======
6.1
This test method is useful for research and development, quality assurance, regulatory compliance and specification-based acceptance.
6.2
The kinetic parameters determined by this method may be used to calculate thermal hazard figures-of-merit according to Practice
E1231
.