1.1 本试验方法包括测定干或湿（湿度调节）玻璃化转变温度（T g )聚合物基复合材料的高模量，20GPa（>3×10 6. psi），纤维在弯曲振荡模式下使用动态机械分析仪（DMA），这是动态机械分析（DMA）方法的特定子集。 1.2 玻璃化转变温度取决于所测量的物理性质、测量设备的类型和所使用的实验参数。通过该试验方法测定的玻璃化转变温度（称为“DMA Tg”）可能与通过其他测量技术在同一试样上报告的温度不同。 1.3 该试验方法主要用于由连续定向高模量纤维增强的聚合物基复合材料。其他材料，如纯树脂，可能需要与该测试方法进行非标准偏差，以获得有意义的结果。 1.4 以国际单位制表示的值是标准值。括号中给出的值是对通用单位的非标准数学转换，仅供参考。 1.5 本标准并不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。 1.6 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 该试验方法旨在使用DMA方法测定连续纤维增强聚合物复合材料的玻璃化转变温度。DMA Tg值经常用于指示复合材料的较高使用温度，以及用于复合材料的质量控制。

1.1 This test method covers the procedure for the determination of the dry or wet (moisture conditioned) glass transition temperature (T g ) of polymer matrix composites containing high-modulus, 20 GPa (> 3 × 10 6 psi), fibers using a dynamic mechanical analyzer (DMA) under flexural oscillation mode, which is a specific subset of the Dynamic Mechanical Analysis (DMA) method. 1.2 The glass transition temperature is dependent upon the physical property measured, the type of measuring apparatus and the experimental parameters used. The glass transition temperature determined by this test method (referred to as “DMA Tg”) may not be the same as that reported by other measurement techniques on the same test specimen. 1.3 This test method is primarily intended for polymer matrix composites reinforced by continuous, oriented, high-modulus fibers. Other materials, such as neat resin, may require non-standard deviations from this test method to achieve meaningful results. 1.4 The values stated in SI units are standard. The values given in parentheses are non-standard mathematical conversions to common units that are provided for information only. 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 This test method is designed to determine the glass transition temperature of continuous fiber reinforced polymer composites using the DMA method. The DMA Tg value is frequently used to indicate the upper use temperature of composite materials, as well as for quality control of composite materials.