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Shimadzu Review 76[1・2] (2019.7)
Recently, ISO standards for temperature modulated differential scanning calorimetry (TMDSC) have been under development. By superimposing a periodic temperature modulation on a linear or isothermal temperature control, TMDSC can obtain more information than normal DSC. For instance, the glass transition temperature is an important physical property of polymer materials and can be measured by DSC. However, when enthalpy relaxation or other chemical reactions occur simultaneously with the glass transition, they are hard to discriminate by normal DSC. In such cases, TMDSC can separate and discriminate them clearly. In addition, TMDSC can measure the temporal change of specific heat. This enables us to observe the progress of chemical reactions on isothermal temperature. In this article, we explain the principles of TMDSC, which will become widespread as an ISO established standard method, and introduce some practical applications.
Keywords: Thermal analysis, Temperature modulated differential scanning calorimetry, Polymer material
1GCTA Business Unit, Analytical & Measuring Instruments Division, Shimadzu Corporation, Kyoto, Japan
2Development Support Unit, Corporate Product Design Center, Shimadzu Corporation, Kyoto, Japan
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