标准摘要
[中文适用范围]： 该文件描述了一种超声波传播方法，用于确定聚合物在通常在0.5 MHz至5 MHz范围内的离散频率下的纵向复数模量L * 和剪切复数模量G * 的存储分量。 该方法适用于测量储能模量在 0.01 GPa 至 200 GPa 范围内且损耗因数在 1 MHz 左右低于 0.1 的材料。 对于损耗较高的材料，波形失真会在速度测量中引入显着误差，并且只能使用本文档范围之外的程序来减少误差。 该方法允许在小样本（通常为 50 mm × 20 mm × 5 mm）或较大样本或板材的小区域上进行测量。 因此可以获得有关样本模量的均匀性或各向异性（见 10.5）的信息。 [外文原描述]： This document describes an ultrasonic wave propagation method for determining the storage components of the longitudinal complex modulus L* and the shear complex modulus G* of polymers at discrete frequencies typically in the range 0,5 MHz to 5 MHz. The method is suitable for measuring materials with storage moduli in the range 0,01 GPa to 200 GPa and with loss factors below 0,1 at around 1 MHz. With materials that have a higher loss, significant errors in velocity measurement are introduced through waveform distortion and can only be reduced using procedures that are outside the scope of this document. The method allows measurements to be made on small specimens, typically 50 mm × 20 mm × 5 mm, or small regions of larger specimens or sheets. It is therefore possible to obtain information on the homogeneity or anisotropy (see 10.5) of modulus in a specimen.
英文名称Plastics — Determination of dynamic mechanical properties — Part 8: Longitudinal and shear vibration — Wave-propagation method