Ramakers-van Dorp Esther, Haenel Thomas, Ciongwa Dominik, Möginger Bernhard, Hausnerova Berenika
Department of Natural Sciences, University of Applied Sciences Bonn-Rhein-Sieg, von Liebigstrasse 20, 53359 Rheinbach, Germany.
Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, 760 01 Zlín, Czech Republic.
Polymers (Basel). 2019 May 8;11(5):833. doi: 10.3390/polym11050833.
This study presents a microindentation system which allows spatially resolved local as well as bulk viscoelastic material information to be obtained within one instrument. The microindentation method was merged with dynamic mechanical analysis (DMA) for a tungsten cone indenter. Three tungsten cone indenters were investigated: tungsten electrode, tungsten electrode + 2% lanthanum, and tungsten electrode + rare earth elements. Only the tungsten electrode + 2% lanthanum indenter showed the sinusoidal response, and its geometry remained unaffected by the repeated indentations. Complex moduli obtained from dynamic microindentation for high-density polyethylene, polybutylene terephthalate, polycarbonate, and thermoplastic polyurethane are in agreement with the literature. Additionally, by implementing a specially developed x-y-stage, this study showed that dynamic microindentation with a tungsten cone indenter was an adequate method to determine spatially resolved local viscoelastic surface properties.
本研究提出了一种微压痕系统，该系统能够在一台仪器内获取空间分辨的局部以及整体粘弹性材料信息。微压痕方法与针对钨锥压头的动态力学分析（DMA）相结合。研究了三种钨锥压头：钨电极、钨电极+2%镧以及钨电极+稀土元素。只有钨电极+2%镧的压头呈现出正弦响应，并且其几何形状不受重复压痕的影响。通过动态微压痕获得的高密度聚乙烯、聚对苯二甲酸丁二醇酯、聚碳酸酯和热塑性聚氨酯的复数模量与文献一致。此外，通过采用专门开发的x-y工作台，本研究表明，使用钨锥压头进行动态微压痕是确定空间分辨的局部粘弹性表面性质的一种合适方法。
