ISO 6721-2:2008 塑料 动态机械性能的测定 第2部分：扭转摆法

标准编号：ISO 6721-2:2008

中文名称：塑料 动态机械性能的测定 第2部分：扭转摆法

英文名称：Plastics — Determination of dynamic mechanical properties — Part 2: Torsion-pendulum method

发布日期：2008-06

标准范围

ISO 6721-2:20 08规定了两种方法（A和B），用于确定塑料的线性动态机械性能，即扭转模量的储存和损耗分量，作为温度的函数，对于0.1 Hz至10 Hz的频率范围内的小变形。在足够宽的温度范围内(例如，对于大多数市售塑料，从-50℃至+150℃)测量的这些性质的温度依赖性给出了关于聚合物的过渡区(例如玻璃化转变和熔融转变)的信息。它还提供了关于塑性流动开始的信息。所描述的两种方法不适用于非对称层压板（参见ISO 6721？3，塑料-动态机械性能的测定-第3部分:弯曲振动-共振-曲线法）。这些方法不适用于测试橡胶，用户可参考ISO 4664？硫化橡胶或热塑性橡胶。动态性能的测定。第2部分:低频扭摆法。

ISO 6721-2:2008 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.The temperature dependence of these properties, measured over a sufficiently broad range of temperatures (for example from -50 °C to +150 °C for the majority of 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, Plastics — Determination of dynamic mechanical properties — Part 3: Flexural vibration — Resonance-curve method). The methods are not suitable for testing rubbers, for which the user is referred to ISO 4664？2, Rubber, vulcanized or thermoplastic — Determination of dynamic properties — Part 2: Torsion pendulum methods at low frequencies.

标准预览图