1.1 本试验方法概述了动态机械仪器的使用，用于收集和报告热塑性和热固性树脂以及直接成型或从片材、板材或成型形状切割而成的矩形试样形式的复合材料系统的粘弹性。生成的拉伸数据用于使用各种动态机械仪器来识别塑料材料或组合物的热机械性能。 1.2 本试验方法旨在提供一种方法，根据实践，使用非共振强迫振动技术测定各种塑料的粘弹性 D4065 弹性（储存）模量的曲线图；损失（粘性）模量；作为频率、时间或温度的函数的复数模量和tanδ指示聚合物材料系统的热机械性能的显著转变。 1.3 该测试方法适用于广泛的频率范围，通常为0.01 Hz至100 赫兹。 1.4 由于可能符合仪表要求，生成的数据旨在指示相对而非绝对的特性值。 1.5 通过这种测试方法获得的测试数据是相关的，适合在工程设计中使用。 1.6 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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。 注1: 该测试方法在技术上等同于ISO 6721，第4部分。 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 该测试方法提供了一种简单的方法来表征使用极少量材料的塑性材料的热机械行为。所获得的数据用于质量控制、研究和开发，以及建立最佳加工条件。 5.2 动态力学测试通过测量作为频率、温度或时间函数的弹性模量和损耗模量，为确定热机械特性提供了一种灵敏的方法。材料的模量和tanδ与这些变量的关系图可用于提供指示功能特性、固化有效性（热固性树脂系统）和特定条件下阻尼行为的图形表示。 5.2.1 观察到的数据是特定于实验条件的。完整报告（如本测试方法所述）获得数据的条件对于帮助用户解释数据——调和明显或感知的差异至关重要。 5.3 此测试方法可用于评估: 5.3.1 模量作为温度的函数， 5.3.2 作为频率函数的模量， 5.3.3 加工处理的效果， 5.3.4 树脂的相对行为特性，包括固化和阻尼， 5.3.5 衬底类型和取向（制造）对弹性模量的影响， 5.3.6 可能影响可加工性或性能的制剂添加剂的作用， 5.3.7 退火对模量和玻璃化转变温度的影响， 5.3.8 纵横比对纤维增强材料模量的影响，以及 5.3.9 填料、添加剂对模量和玻璃化转变温度的影响。 5.4 在进行此测试方法之前，请参考被测试材料的规范。相关ASTM材料规范中涵盖的任何试样制备、处理、尺寸或试验参数，或其组合，应优先于本试验方法中提及的试样。 如果没有相关的ASTM材料规范，则默认条件适用。

1.1 This test method outlines the use of dynamic mechanical instrumentation for gathering and reporting the viscoelastic properties of thermoplastic and thermosetting resins and composite systems in the form of rectangular specimens molded directly or cut from sheets, plates, or molded shapes. The tensile data generated is used to identify the thermomechanical properties of a plastic material or composition using a variety of dynamic mechanical instruments. 1.2 This test method is intended to provide a means for determining viscoelastic properties of a wide variety of plastic materials using nonresonant forced-vibration techniques, in accordance with Practice D4065 . Plots of the elastic (storage) modulus; loss (viscous) modulus; complex modulus and tan delta as a function of frequency, time, or temperature are indicative of significant transitions in the thermomechanical performance of the polymeric material system. 1.3 This test method is valid for a wide range of frequencies, typically from 0.01 Hz to 100 Hz. 1.4 Due to possible instrumentation compliance, the data generated are intended to indicate relative and not necessarily absolute property values. 1.5 Test data obtained by this test method are relevant and appropriate for use in engineering design. 1.6 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 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. Note 1: This test method is technically equivalent to ISO 6721, Part 4. 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 provides a simple means of characterizing the thermomechanical behavior of plastic materials using very small amounts of material. The data obtained is used for quality control, research and development, as well as the establishment of optimum processing conditions. 5.2 Dynamic mechanical testing provides a sensitive method for determining thermomechanical characteristics by measuring the elastic and loss moduli as a function of frequency, temperature, or time. Plots of moduli and tan delta of a material versus these variables can be used to provide graphical representation indicative of functional properties, effectiveness of cure (thermosetting resin system), and damping behavior under specified conditions. 5.2.1 Observed data are specific to experimental conditions. Reporting in full (as described in this test method) the conditions under which the data was obtained is essential to assist users with interpreting the data an reconciling apparent or perceived discrepancies. 5.3 This test method can be used to assess: 5.3.1 Modulus as a function of temperature, 5.3.2 Modulus as a function of frequency, 5.3.3 The effects of processing treatment, including orientation, 5.3.4 Relative resin behavioral properties, including cure and damping, 5.3.5 The effects of substrate types and orientation (fabrication) on elastic modulus, 5.3.6 The effects of formulation additives which might affect processability or performance, 5.3.7 The effects of annealing on modulus and glass transition temperature, 5.3.8 The effect of aspect ratio on the modulus of fiber reinforcements, and 5.3.9 The effect of fillers, additives on modulus and glass transition temperature. 5.4 Before proceeding with this test method, make reference to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials specification shall take precedence over those mentioned in this test method. If there are no relevant ASTM material specifications, then the default conditions apply.