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
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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