ISO 6721-2:2019 塑料 动态机械性能的测定 第2部分：扭转摆法

标准编号：ISO 6721-2:2019

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：2019-04

标准范围

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:这些性能的温度依赖性，在足够宽的温度范围内测量（例如，对于大多数商用塑料，从-50°C到+150°C），提供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。所述两种方法不适用于非-对称层压板（见ISO 6721-3）。这些方法不适用于测试橡胶，用户可参考ISO 4664-2。

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.

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