ISO 6721-5:2019 塑料 动态机械性能的测定 第5部分：挠曲振动 非共振法

标准编号：ISO 6721-5:2019

中文名称：塑料 动态机械性能的测定 第5部分：挠曲振动 非共振法

英文名称：Plastics — Determination of dynamic mechanical properties — Part 5: Flexural vibration — Non-resonance method

发布日期：2019-04

标准范围

本文件描述了一种弯曲、非共振方法，用于在频率通常在0.01 Hz至100 Hz范围内测定聚合物弯曲复合模量Ef*的成分。可以进行更高频率的测量，但测量的动态特性可能会产生重大误差（见10.2.2和10.2.3）。该方法适用于测量10 MPa至200 GPa范围内的动态存储模量。注:尽管可以研究模量小于10 MPa的材料，但可以使用剪切变形模式对其动态机械性能进行更精确的测量（见ISO 6721）-6).该方法特别适用于测量大于0.02的损耗系数，因此可以方便地用于研究大多数玻璃橡胶松弛区的动态特性随温度和频率的变化（见ISO 6721-1）。在频率和温度的大范围内确定的数据的可用性，使得可以使用频率/温度偏移程序导出主图，该程序在不同温度下呈现扩展频率范围内的动态特性。

This document describes a flexural, non-resonance method for determining the components of the flexural complex modulus Ef* of polymers at frequencies typically in the range 0,01 Hz to 100 Hz. Higher-frequency measurements can be made, but significant errors in the dynamic properties measured are likely to result (see 10.2.2 and 10.2.3). The method is suitable for measuring dynamic storage moduli in the range 10 MPa to 200 GPa.NOTE Although materials with moduli less than 10 MPa can be studied, more accurate measurements of their dynamic-mechanical properties can be made using shear modes of deformation (see ISO 6721-6).This method is particularly suited to the measurement of loss factors greater than 0,02 and can therefore be conveniently used to study the variation of dynamic properties with temperature and frequency through most of the glass-rubber relaxation region (see ISO 6721？1). The availability of data determined over wide ranges of both frequency and temperature enables master plots to be derived, using frequency/temperature shift procedures, which present dynamic properties over an extended frequency range at different temperatures.

标准预览图