标准编号：ISO 6721-9:2019
中文名称：塑料 动态机械性能的测定 第9部分：拉力振动 声脉冲传播法
英文名称：Plastics — Determination of dynamic mechanical properties — Part 9: Tensile vibration — Sonic-pulse propagation method
发布日期：2019-04
标准范围
This document 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.
The method allows measurements to be made on thin films or fine fibres and long specimens, typically
tapes of 300 mm × 5 mm × 0,1 mm or fibres of 300 mm × 0,1 mm (diameter).
This method may not be suitable for cellular plastics, composite plastics and multilayer products.
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