1.1 本试验方法概述了使用动态机械仪器测定和报告热塑性树脂和其他类型熔融聚合物的流变性能。该方法可用于确定作为频率、应变幅度、温度和时间的函数的此类材料的复数粘度和其他显著粘弹性特性。众所周知，填料和其他添加剂会影响流变性能。 1.2 它结合了一种实验室测试方法，用于确定在通常称为机械或动态光谱仪的仪器上经受各种振荡变形的聚合物熔体的相关流变特性。 1.3 该试验方法旨在提供一种通过非共振、强迫振动技术测定熔融聚合物（如热塑性塑料和热塑性弹性体）在一定温度范围内的流变特性的方法。 模量、粘度和tanδ作为动态振荡（频率）、应变幅度、温度和时间的函数的图表示熔融聚合物的粘弹性。 1.4 该测试方法适用于广泛的频率范围，通常为0.01 Hz至100 Hz。 1.5 该试验方法适用于均质和非均质熔融聚合物系统和含有化学添加剂的复合配方，包括填料、增强剂、稳定剂、增塑剂、阻燃剂、抗冲改性剂、加工助剂和其他重要的化学添加剂，这些添加剂通常被掺入聚合物系统中以获得特定的功能性能，并且可能影响可加工性和功能性能。这些聚合物材料体系的熔融粘度通常小于10 6. Pa·s（10 7. 泊）。 1.6 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。 1.7 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。 1.8 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: 该试验方法等效于ISO 6721第10部分。 1.9 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热塑性聚合物的重要流变特性和粘度，使用非常少量的材料（直径约为25至50mm，厚度约为1至3mm）。 大约3至5g）。数据通常用于质量控制、研发和建立最佳加工条件。 5.2 动态力学测试通过测量作为频率、应变、温度或时间函数的弹性模量和损耗模量，为确定熔融聚合物性能提供了一种灵敏的方法。粘度、储存模量和损耗模量以及tanδ作为上述工艺参数的函数的曲线图提供了指示分子量、分子量分布、链支化的影响以及特定条件下的熔体可加工性的图形表示。 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 本试验方法中获得的值可用于评估以下内容: 5.3.1 聚合物熔体的复数粘度作为动态振荡的函数， 5.3.2 加工粘度、最小值以及粘度随实验参数的变化， 5.3.3 加工处理的效果， 5.3.4 聚合物的相对行为特性，包括粘度和阻尼，以及 5.3.5 配方添加剂可能影响加工性或性能的影响。 5.4 在继续使用此测试方法之前，请参阅所测试材料的规范。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 in determining and reporting the rheological properties of thermoplastic resins and other types of molten polymers. The method is useful for determining the complex viscosity and other significant viscoelastic characteristics of such materials as a function of frequency, strain amplitude, temperature, and time. It is known that fillers and other additives influence rheological properties. 1.2 It incorporates a laboratory test method for determining the relevant rheological properties of a polymer melt subjected to various oscillatory deformations on an instrument of the type commonly referred to as a mechanical or dynamic spectrometer. 1.3 This test method is intended to provide a means of determining the rheological properties of molten polymers, such as thermoplastics and thermoplastic elastomers over a range of temperatures by nonresonant, forced-vibration techniques. Plots of modulus, viscosity, and tan delta as a function of dynamic oscillation (frequency), strain amplitude, temperature, and time are indicative of the viscoelastic properties of a molten polymer. 1.4 This test method is valid for a wide range of frequencies, typically from 0.01 Hz to 100 Hz. 1.5 This test method is intended for homogenous and heterogeneous molten polymeric systems and composite formulations containing chemical additives, including fillers, reinforcements, stabilizers, plasticizers, flame retardants, impact modifiers, processing aids, and other important chemical additives often incorporated into a polymeric system for specific functional properties, and which could affect the processability and functional performance. These polymeric material systems have molten viscosities typically less than 10 6 Pa·s (10 7 poise). 1.6 Test data obtained by this test method are relevant and appropriate for use in engineering design. 1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.8 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 equivalent to ISO 6721, Part 10. 1.9 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 important rheological properties and viscosity of thermoplastic polymers using very small amounts of material (approximately 25 to 50 mm in diameter by 1 to 3 mm in thickness. approximately 3 to 5 g). Data are generally used for quality control, research and development, and establishment of optimum processing conditions. 5.2 Dynamic mechanical testing provides a sensitive method for determining molten polymer properties by measuring the elastic and loss moduli as a function of frequency, strain, temperature, or time. Plots of viscosity, storage, and loss moduli, and tan delta as a function of the aforementioned process parameters provide graphical representation indicative of molecular weight, molecular weight distribution, effects of chain branching, and melt-processability for 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 Values obtained in this test method can be used to assess the following: 5.3.1 Complex viscosity of the polymer melt as a function of dynamic oscillation, 5.3.2 Processing viscosity, minimum as well as changes in viscosity as a function of experimental parameters, 5.3.3 Effects of processing treatment, 5.3.4 Relative polymer behavioral properties, including viscosity and damping, and 5.3.5 Effects of formulation additives that might affect processability or performance. 5.4 Before proceeding with this test method, refer to the specification for 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 the test method. If there are no relevant ASTM material specifications, then the default conditions apply.