1.1本试验方法概述了动态机械仪器在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方面的使用。它可用作确定此类材料的复粘度和其他重要粘弹性特性的方法，如频率、应变幅度、温度和时间的函数。这些性能可能会受到填料和其他添加剂的影响。 1.2它包括一种实验室测试方法，用于在通常称为机械或动态光谱仪的仪器上确定受到各种振荡变形的聚合物熔体的相关流变特性。 1.3本试验方法旨在提供一种方法，通过非共振、强制力作用在一定温度范围内测定熔融聚合物（如热塑性塑料和热塑性弹性体）的流变性能- 振动技术。模量、粘度和tanδ随动态振荡（频率）、应变幅度、温度和时间变化的曲线图表示熔融聚合物的粘弹性。 1.4本试验方法适用于广泛的频率范围，通常为0.01至100 Hz。 1.5本试验方法适用于含有化学添加剂的均质和非均质熔融聚合物系统和复合配方，包括填料、增强材料、稳定剂、增塑剂、阻燃剂、冲击改进剂、加工助剂和其他重要的化学添加剂，这些添加剂通常结合到聚合物系统中，以获得特定的功能特性，这可能会影响加工性能和功能性能。这些聚合物材料系统的熔融粘度通常小于10 6. Pas（10 7. 平衡）。 1.6在不同实验条件下获得的结果可能会出现明显差异。在不改变观察数据的情况下，完整报告（如本试验方法所述）获得数据的条件可能会使在另一项研究中观察到的明显差异得以调和。 1.7通过本试验方法获得的试验数据相关且适用于工程设计。 1.8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。 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 注1 本试验方法等同于ISO 6721第10部分。 ====意义和用途====== 本试验方法提供了一种简单的方法，使用极少量的材料（直径约25至50 mm，厚度约1至3 mm，约3至5 g）表征热塑性聚合物的重要流变特性和粘度。数据可用于质量控制、研发和建立最佳加工条件。 动态力学测试通过测量弹性模量和损耗模量作为频率、应变、温度或时间的函数，为确定熔融聚合物的性能提供了一种灵敏的方法。粘度、储存和损耗模量以及tanδ随上述工艺参数变化的曲线图提供了指示特定条件下分子量、分子量分布、支链效应和熔体加工性的图形表示。 本试验方法中获得的值可用于评估以下各项: 5.3.1聚合物熔体的复粘度作为动态振荡的函数， 5.3.2加工粘度、最小粘度以及粘度随实验参数的变化， 5.3.3加工处理的影响， 5.3.4相对聚合物行为特性，包括粘度和阻尼，以及 5.3.5可能影响加工性能或性能的配方添加剂的影响。 在继续使用本试验方法之前，应参考被测材料的规范。相关ASTM材料规范中涵盖的任何试样制备、调节、尺寸或测试参数，或其组合，应优先于试验方法中提及的。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. It may be used as a method for determining the complex viscosity and other significant viscoelastic characteristics of such materials as a function of frequency, strain amplitude, temperature, and time. Such properties may be influenced by fillers and other additives. 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 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 Pas (10 7 poise). 1.6 Apparent discrepancies may arise in results obtained under differing experimental conditions. Without changing the observed data, reporting in full (as described in this test method) the conditions under which the data was obtained may enable apparent differences observed in another study to be reconciled. 1.7 Test data obtained by this test method are relevant and appropriate for use in engineering design. 1.8 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 and health practices and determine the applicability of regulatory limitations prior to use. Note 1 This test method is equivalent to ISO 6721, Part 10. ====== Significance And Use ====== 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 may be used for quality control, research and development, and establishment of optimum processing conditions. 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. 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. Before proceeding with this test method, reference should be made 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 the test method. If there are no relevant ASTM material specifications, then the default conditions apply.