1.1本试验方法包括使用动态机械振荡仪器收集和报告热固性树脂固化行为的热进展。它可用于测定无支撑树脂和支撑在基材上并承受各种振荡变形的树脂的固化性能。这些变形可能是使用动态机械仪器在受支撑树脂的剪切或动态压缩中发生的。 1.2本试验方法旨在通过自由振动、共振和非共振强迫振动，确定支撑和非支撑热固性树脂在一定温度范围内的固化行为- 振动技术，符合规程D 4065。模量、固化行为、tanδ和阻尼指数随时间/温度变化的曲线图表示树脂的热推进或固化特性。 1.3本试验方法适用于广泛的频率范围，通常为0.01至100 Hz。然而，强烈建议低频测试条件（通常低于1.5 Hz）将产生更明确的固化行为信息。 1.4本试验方法适用于未固化有效剪切弹性模量大于0.5 MPa的树脂/基材复合材料。 1.5在不同实验条件下获得的结果可能会出现明显差异。 通过完整报告（如本试验方法所述）获得数据的条件，通常可以在不改变观察数据的情况下，调和与另一项研究中观察到的结果的这些明显差异。 1.6由于可能的仪器符合性，特别是在压缩模式下，生成的数据可能表示相对特性值，而不一定是绝对特性值。 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。 1.9 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。 注释5中给出了具体的预防说明。 注2-没有类似或等效的ISO标准。 ====意义和用途====== 本试验方法提供了一种简单的方法，用极少量的材料（小于3至5g）表征热固性树脂的固化行为。获得的数据可用于质量控制、研究和开发以及建立最佳加工条件。 动态力学测试通过测量弹性模量和损耗模量作为温度或时间的函数，或两者的函数，为确定固化特性提供了一种灵敏的方法。 材料的固化行为和tanδ随时间变化的曲线图提供了指示特定时间-温度曲线下固化行为的图形表示。 本试验方法可用于评估以下各项: 5.3.1固化行为，包括固化速率、凝胶和固化时间。 5.3.2加工行为，以及随时间/温度的变化。 笔记 3-基质的存在阻止了绝对测量，但允许对固化期间的流动行为进行相对测量。 5.3.3加工处理的效果。 5.3.4相对树脂行为特性，包括固化行为和阻尼。 5.3.5基材类型对固化的影响。 笔记 4-由于支撑编织物的刚性，从动态机械轨迹获得的凝胶时间将长于在相同频率下测量的无支撑树脂的实际凝胶时间。对于具有更大支撑-聚合物刚度比的复合材料，这种差异将更大。 3. 5.3.6可能影响加工性能或性能的配方添加剂的影响。 对于许多材料，可能有一个规范要求使用该试验方法，但在遵守规范时，一些程序修改优先。因此，建议在使用本试验方法之前参考该材料规范。 分类系统D 4000的表1列出了目前存在的ASTM材料标准。

1.1 This test method covers the use of dynamic-mechanical-oscillation instrumentation for gathering and reporting the thermal advancement of cure behavior of thermosetting resin. It may be used for determining the cure properties of unsupported resins and resins supported on substrates and subjected to various oscillatory deformations. These deformations may be in shear or the dynamic compression of supported resins using a dynamic mechanical instrument. 1.2 This test method is intended to provide means for determining the cure behavior of supported and unsupported thermosetting resins over a range of temperatures by free vibration and resonant and nonresonant forced-vibration techniques, in accordance with Practice D 4065. Plots of modulus, cure behavior, tan delta, and damping index as a function of time/temperature are indicative of the thermal advancement or cure characteristics of a resin. 1.3 This test method is valid for a wide range of frequencies, typically from 0.01 to 100 Hz. However, it is strongly recommended that low-frequency test conditions, generally below 1.5 Hz, will generate more definitive cure-behavior information. 1.4 This test method is intended for resin/substrate composites that have an uncured effective elastic modulus in shear greater than 0.5 MPa. 1.5 Apparent discrepancies may arise in results obtained under differing experimental conditions. These apparent differences from results observed in another study can usually be reconciled, without changing the observed data, by reporting in full (as described in this test method) the conditions under which the data were obtained. 1.6 Due to possible instrumentation compliance, especially in the compressive mode, the data generated may indicate relative and not necessarily absolute property values. 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. 1.9 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. Specific precautionary statements are given in Note 5. Note 2—There is no similar or equivalent ISO standard. ====== Significance And Use ====== This test method provides a simple means of characterizing the cure behavior of thermosetting resins using very small amounts of material (fewer than 3 to 5 g). The data obtained may be used for quality control, research and development, and establishment of optimum processing conditions. Dynamic mechanical testing provides a sensitive method for determining cure characteristics by measuring the elastic and loss moduli as a function of temperature or time, or both. Plots of cure behavior and tan delta of a material versus time provide graphical representation indicative of cure behavior under a specified time-temperature profile. This test method can be used to assess the following: 5.3.1 Cure behavior, including rate of cure, gel, and cure time. 5.3.2 Processing behavior, as well as changes as a function of time/temperature. Note 3—The presence of the substrate prevents an absolute measure, but allows relative measures of flow behavior during cure. 5.3.3 The effects of processing treatment. 5.3.4 Relative resin behavioral properties, including cure behavior and damping. 5.3.5 The effects of substrate types on cure. Note 4—Due to the rigidity of a supporting braid, the gel time obtained from dynamic mechanical traces will be longer than actual gel time of the unsupported resin measured at the same frequency. This difference will be greater for composites having greater support-to-polymer rigidity ratios. 3 5.3.6 Effects of formulation additives that might affect processability or performance. For many materials, there may be a specification that requires the use of this test method, but with some procedural modifications that take precedence when adhering to the specification. Therefore, it is advisable to refer to that material specification before using this test method. Table 1 of Classification System D 4000 lists the ASTM materials standards that currently exist.