Abstract

Using the pulsed molecular acoustics method, the velocity of longitudinal and lateral sound waves in amorphous organic polymers is measured. The elastic moduli and Poisson ratio, as well as the previously introduced effective elastic modulus, are determined. It is shown that for amorphous polymers the ratio of the bulk modulus to the effective elastic modulus is a single-valued function of the Poisson ratio. The effective elastic modulus is closely related to the Grüneisen parameter, a measure of anharmonism. The nature of the Poisson ratio of amorphous polymers is considered.

中文翻译：

---

非晶态有机聚合物的弹性模量和泊松比

摘要

使用脉冲分子声学方法，测量非晶有机聚合物中纵向和横向声波的速度。确定弹性模量和泊松比以及先前引入的有效弹性模量。结果表明，对于无定形聚合物，体积模量与有效弹性模量之比是泊松比的单值函数。有效弹性模量与Grüneisen参数密切相关，Grüneisen参数是非谐性的量度。考虑了无定形聚合物的泊松比的性质。