1.1 该试验方法通过差示扫描量热法测定热反应性化学物质或化学混合物的反应放热，使用毫克试样尺寸。这种反应性材料可以包括热不稳定或热固性材料。 1.2 该试验方法还确定了放热反应的外推起始温度和峰值热流温度。 1.3 该试验方法可在固体、液体或浆料上进行。 1.4 该试验方法的适用温度范围为25 °C至600 °C。 1.5 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.6 本标准与试验方法有关 E537 ，但提供了其他信息。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者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。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 该试验方法可用于确定材料的外推起始温度、峰值热流温度和反应热。通过该测试方法确定的任何起始温度都不能用作确定储存或加工条件的唯一信息。 5.2 该测试方法可用于确定测试前样品中已完成反应的分数。已经完成的反应的这一部分可以是热反应性聚合物的固化程度的量度，或者可以是老化时热反应性材料的分解的量度。 5.3 实践中可使用反应热值 E1231 以确定潜在危险值——爆炸潜力和冲击敏感性。 5.4 该测试方法可用于研究、过程控制、质量保证和规范验收。

1.1 This test method determines the exothermic heat of reaction of thermally reactive chemicals or chemical mixtures, using milligram specimen sizes, by differential scanning calorimetry. Such reactive materials may include thermally unstable or thermoset materials. 1.2 This test method also determines the extrapolated onset temperature and peak heat flow temperature for the exothermic reaction. 1.3 This test method may be performed on solids, liquids or slurries. 1.4 The applicable temperature range of this test method is 25 °C to 600 °C. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 This standard is related to Test Method E537 , but provides additional information. 1.7 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. 1.8 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 This test method is useful in determining the extrapolated onset temperature, the peak heat flow temperature and the heat of reaction of a material. Any onset temperature determined by this test method is not valid for use as the sole information used for determination of storage or processing conditions. 5.2 This test method is useful in determining the fraction of a reaction that has been completed in a sample prior to testing. This fraction of reaction that has been completed can be a measure of the degree of cure of a thermally reactive polymer or can be a measure of decomposition of a thermally reactive material upon aging. 5.3 The heat of reaction values may be used in Practice E1231 to determine hazard potential figures-of-merit Explosion Potential and Shock Sensitivity. 5.4 This test method may be used in research, process control, quality assurance, and specification acceptance.