标题： 通过使用布里渊光谱的超声测量从动态到静态玻璃化转变 显示英文标题

标题： From the dynamic to the static glass transition via hypersonic measurements using Brillouin spectroscopy

摘要： 对于脆性、低分子量的双酚A二缩水甘油醚（DGEBA），我们报告了通过布里渊光谱法对纵向弹性模量的超声研究，发现其动态玻璃化转变以及在热玻璃化转变附近的进一步声学异常。这种纵向极化声子的额外声学异常通过在同一热玻璃化转变温度下剪切声子的异常出现得到了证实。广义柯西关系的分析表明，这两个异常都与一种独立于所谓{\alpha }-弛豫过程的玻璃化转变现象有关。 显示英文摘要

摘要： For the fragile, low-molecular-weight liquid diglycidyl ether of bisphenol A (DGEBA), we report on the dynamic glass transition and a further acoustic anomaly in the vicinity of the thermal glass transition based on hypersonic investigations of the longitudinal elastic modulus using Brillouin spectroscopy. This additional acoustic anomaly of the longitudinally polarized phonon is confirmed by the occurrence of an anomaly of the shear phonon at the same thermal glass transition temperature. Analysis of the generalized Cauchy relation suggests that both anomalies are coupled to a glass transition phenomenon independent of the so-called {\alpha}-relaxation process.