论文标题
压电 - 电动剪切流变计：实验实施和数据提取方面的进一步发展
Piezo-Electric Shear Rheometry: Further developments in experimental implementation and data extraction
论文作者
论文摘要
压电电剪切量表（PSG）[Christensen＆Olsen，Rev。Sci。乐器。 66，5019，1995]是一种流变技术，旨在测量其玻璃过渡温度附近粘性液体的复杂剪切模量。我们报告了PSG技术的最新进展：1）优化了数据提取过程，该过程将方法的频率范围扩展到50至70 kHz之间。 2）简化测量单元仅使用一个压电电陶瓷盘而不是三个。我们提出了针对液体样品的设计的实现。使用此设计获得的数据表明，对于允许在轴向方向上允许样品的热收缩，需要使用软额外的垫片。模型计算表明，当液体在冷却时液体变成粘性时，径向方向的流动会受到细胞的限制几何形状的阻碍。该方法特别适合（但不限于）玻璃材料。
The Piezo-electric Shear Gauge (PSG) [Christensen & Olsen, Rev. Sci. Instrum. 66, 5019, 1995] is a rheometric technique developed to measure the complex shear modulus of viscous liquids near their glass transition temperature. We report recent advances to the PSG technique: 1) The data extraction procedure is optimized which extends the upper limit of the frequency range of the method to between 50 and 70 kHz. 2) The measuring cell is simplified to use only one piezo-electric ceramic disc instead of three. We present an implementation of this design intended for liquid samples. Data obtained with this design revealed that a soft extra spacer is necessary to allow for thermal contraction of the sample in the axial direction. Model calculations show that flow in the radial direction is hindered by the confined geometry of the cell when the liquid becomes viscous upon cooling. The method is especially well-suited for -- but not limited to -- glassy materials.
