本文件规定了两种方法（A和B），用于测定塑料的线性动态机械性能，即扭转模量的存储和损耗分量，作为温度的函数，用于0.1 Hz至10 Hz频率范围内的小变形。 注意这些特性的温度依赖性，在足够宽的温度范围内测量 温度（例如，对于大多数商用塑料而言，从-50°C到+150°C）给出了聚合物的过渡区域（例如玻璃化转变和熔融转变）的信息。 它还提供了有关塑性流动开始的信息。 上述两种方法不适用于非对称层压板（见ISO 6721-3）。这个 方法不适用于测试橡胶，用户可参考ISO 4664-2。交叉引用:ISO 6721-1ISO 4664-2ISO 6721-3购买时可用的所有现行修订版均包含在本文件的购买中。

This document specifies two methods (A and B) for determining the linear dynamic mechanical properties of plastics, i.e. the storage and loss components of the torsional modulus, as a function of temperature, for small deformations within the frequency range from 0,1 Hz to 10 Hz. NOTE The temperature dependence of these properties, measured over a sufficiently broad range of temperatures (for example from -50 °C to +150 °C for most commercially available plastics), gives information on the transition regions (for example the glass transition and the melting transition) of the polymer. It also provides information concerning the onset of plastic flow. The two methods described are not applicable to non-symmetrical laminates (see ISO 6721-3). The methods are not suitable for testing rubbers, for which the user is referred to ISO 4664-2.Cross References:ISO 6721-1ISO 4664-2ISO 6721-3All current amendments available at time of purchase are included with the purchase of this document.