1.1 该试验方法包括玻璃化转变温度的分配( T g )使用动态机械分析仪对材料进行分析。 1.2 本试验方法适用于在玻璃化过渡区热稳定的热塑性聚合物、热固性聚合物和部分结晶材料。 1.3 该试验方法的适用温度范围取决于所使用的仪器，但为了涵盖所有材料，最低温度应为 −150°C。 1.4 该试验方法适用于弹性模量在0.5MPa至100GPa范围内的材料。 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 该测试方法可用于定位玻璃化转变区域，并指定非晶态和半晶态材料的玻璃化转变温度。 5.2 动态机械分析仪监测材料粘弹性特性随温度和频率的变化，提供了量化这些变化的方法。在理想情况下，储能模量下降开始的温度标志着玻璃化转变。 5.3 玻璃化转变发生在一定的温度范围内。此方法指定单个温度( T g )以表示通过动态力学分析测量的温度范围。 T g 可以通过各种技术来确定，并且可以根据该技术而变化。 5.4 玻璃化转变温度( T g )可用于表征热塑性、热固性和半结晶材料的许多重要物理特性，包括它们的热历史、加工条件、物理稳定性、化学反应的进展、固化程度以及机械和电学行为。 5.5 这种测试方法有助于质量控制、规范验收和研究。

1.1 This test method covers the assignment of a glass transition temperature ( T g ) of materials using dynamic mechanical analyzers. 1.2 This test method is applicable to thermoplastic polymers, thermoset polymers, and partially crystalline materials which are thermally stable in the glass transition region. 1.3 The applicable range of temperatures for this test method is dependent upon the instrumentation used, but, in order to encompass all materials, the minimum temperature should be about −150 °C. 1.4 This test method is intended for materials having an elastic modulus in the range of 0.5 MPa to 100 GPa. 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 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 This test method can be used to locate the glass transition region and assign a glass transition temperature of amorphous and semi-crystalline materials. 5.2 Dynamic mechanical analyzers monitor changes in the viscoelastic properties of a material as a function of temperature and frequency, providing a means to quantify these changes. In ideal cases, the temperature of the onset of the decrease in storage modulus marks the glass transition. 5.3 The glass transition takes place over a temperature range. This method assigns a single temperature ( T g ) to represent that temperature range as measured by dynamic mechanical analysis. T g may be determined by a variety of techniques and may vary according to that technique. 5.4 A glass transition temperature ( T g ) is useful in characterizing many important physical attributes of thermoplastic, thermosets, and semi-crystalline materials including their thermal history, processing conditions, physical stability, progress of chemical reactions, degree of cure, and both mechanical and electrical behavior. 5.5 This test method is useful for quality control, specification acceptance, and research.