BS ISO 6721-9:2019描述了一种脉冲传播法，用于在离散频率（通常在3 kHz至10 kHz范围内）下测定聚合物复合拉伸模量E'的存储分量。该方法适用于测量存储模量在0.01 GPa至200 GPa范围内，损耗系数在10 kHz左右时低于0.1的材料。由于材料损耗较大，速度测量中的显著误差会通过振幅衰减引入。交叉引用:ISO 1183-1ISO 1183-3ISO 6721-1ISO 1183-2购买时可用的所有现行修订版均包含在本文件的购买中。

BS ISO 6721-9:2019 describes a pulse propagation method for determining the storage component of the complex tensile modulus E' of polymers at discrete frequencies typically in the range 3 kHz to 10 kHz. 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 10 kHz. With materials having a higher loss, significant errors in velocity measurement are introduced through decay of amplitude.Cross References:ISO 1183-1ISO 1183-3ISO 6721-1ISO 1183-2All current amendments available at time of purchase are included with the purchase of this document.