1.1 本试验方法包括使用差示扫描量热法或差示热分析法分配材料的玻璃化转变温度。 1.2 该测试方法适用于非晶材料或包含非晶区域的部分结晶材料，这些材料是稳定的，并且在玻璃化转变区域中不发生分解或升华。 1.3 正常工作温度范围为−120 °C至500 °C。根据使用的仪器，温度范围可能会延长。 1.4 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。 1.5 ISO标准11357–2等同于本标准。 1.6 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。 1.7 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 差示扫描量热法为测定均质材料的比热容变化提供了一种快速测试方法。玻璃化转变表现为比热容的阶跃变化。对于非晶态和半晶态材料，玻璃化转变温度的测定可以获得关于它们的热历史、加工条件、稳定性、化学反应的进展以及机械和电学行为的重要信息。 5.2 这种测试方法有助于研究、质量控制和规范验收。

1.1 This test method covers the assignment of the glass transition temperatures of materials using differential scanning calorimetry or differential thermal analysis. 1.2 This test method is applicable to amorphous materials or to partially crystalline materials containing amorphous regions, that are stable and do not undergo decomposition or sublimation in the glass transition region. 1.3 The normal operating temperature range is from −120 °C to 500 °C. The temperature range may be extended, depending upon the instrumentation 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 ISO standards 11357–2 is equivalent to this standard. 1.6 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. 1.7 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 Differential scanning calorimetry provides a rapid test method for determining changes in specific heat capacity in a homogeneous material. The glass transition is manifested as a step change in specific heat capacity. For amorphous and semicrystalline materials the determination of the glass transition temperature may lead to important information about their thermal history, processing conditions, stability, progress of chemical reactions, and mechanical and electrical behavior. 5.2 This test method is useful for research, quality control, and specification acceptance.