1.1 这些试验方法描述了通过使用因子跳跃的热重分析法无模型测定阿累尼乌斯活化能 ( 1. ) 2. （试验方法A）或调制热重法 ( 2. ) （试验方法B和C）技术。在假设一阶动力学模型的情况下，额外确定了指数前因子。 1.2 这些试验方法适用于具有明确分解轮廓的材料，即平滑、连续的质量变化。 1.3 这些试验方法适用于在400 K到1200 K（名义上为100 K）范围内发生的分解 °C至900°C）。根据使用的仪器和材料，可以扩展温度范围。 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====== 5.1 活化能可用于计算热耐久性，并使用试验方法估计材料在指定温度下的寿命 E1877 . 5.2 由这些试验方法确定的动力学参数可用于质量保证、规范验收、研究和开发。 5.3 由这些测试方法确定的活化能和指数前因子对数的动力学参数本身几乎没有内在价值。该信息的大多数实际应用，例如寿命估计（见测试方法 E1877 )，还需要估计各个值的精度。通过重复测定确定精度是这些试验方法的非下颌部分。

1.1 These test methods describe the model-free determination of Arrhenius activation energy by thermogravimetry using the factor jump ( 1 ) 2 (Test Method A) or modulated thermogravimetry ( 2 ) (Test Methods B and C) techniques. With the assumption of a first-order kinetic model, the pre-exponential factor is additionally determined. 1.2 These test methods are applicable to materials with well-defined decomposition profiles, namely, a smooth, continuous mass change. 1.3 These test methods are applicable to decomposition occurring in the range from 400 K to 1200 K (nominally 100 °C to 900 °C). The temperature range may be extended depending on the instrumentation and material used. 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 ====== 5.1 The activation energy may be used to calculate thermal endurance and an estimate of the lifetime of the material at specified temperatures using Test Method E1877 . 5.2 The kinetic parameters determined by these test methods may be used in quality assurance, specification acceptance, research, and development. 5.3 The kinetic parameters of activation energy and logarithm of the pre-exponential factor determined by these test methods have little intrinsic value in themselves. Most practical applications of this information, such as lifetime estimation (see Test Method E1877 ), also require an estimation of the precision of the respective values. Determination of that precision by replicated determination is a non-manditory part of these test methods.