Aric A. Denton , Yung P. Koh , Sindee L. Simon , Gregory B. McKenna
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引用次数: 0
摘要
之前的工作（N. Shamim、Y. P. Koh、S. L. Simon 和 G. B. McKenna，"通过闪烁 DSC 测定三硝基甲苯（TNT）的玻璃化转变"，Thermochimica Acta，620，36-39 (2015)）报告了使用快速芯片量热计测量 TNT 玻璃化转变温度 Tg 的结果。在该研究中，芯片传感器上使用了银浆来控制液态 TNT。在本研究中，我们发现银浆和 TNT 之间存在相互作用，导致报告的 Tg 比直接放置在芯片量热计传感器上的材料高出约 10 °C。本文介绍并讨论了不同样品制备过程中 Tg 值不同而玻璃脆性指数 m 相似的原因。
In prior work (N. Shamim, Y. P. Koh, S. L. Simon and G. B. McKenna, "The glass transition of trinitrotoluene (TNT) by Flash DSC," Thermochimica Acta,620, 36–39 (2015)) results for the glass transition temperature Tg of TNT based on measurements using a rapid chip calorimeter were reported. In that work a silver paste was used to contain the liquid TNT on the chip sensor. In the present work we show that there was an interaction between the paste and the TNT that cause the reported Tg to be approximately 10 °C higher than what we find for the material when placed directly on the chip calorimeter sensor. The reasons for the differences in Tg values and similarities in the glassy fragility index m from the different sample preparations are presented and discussed.
期刊介绍：
Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application.
The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta.
The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas:
- New and improved instrumentation and methods
- Thermal properties and behavior of materials
- Kinetics of thermally stimulated processes
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