Differential scanning calorimetry (DSC) is a technology to measure the relationship between the power difference lost to the substance and the reference substance and the temperature under the program control temperature. There are mainly two kinds of heat flow type and power compensation type. The DSC equipment equipped in Jinjian Laboratory is heat flow type. The specific principle of the equipment is that many substances in the process of heating or cooling will melt, solidification, crystal transformation, decomposition, combination, adsorption, desorption and other physical and chemical changes, and these changes are accompanied by the change of the heat capacity of the system, thus producing thermal effect, which is manifested as a temperature difference between the substance and the external environment.

Therefore, choose a heat-stable material as a reference, put it together with the sample in the furnace which can be heated at a set rate according to the DSC, respectively record the temperature of the reference object and the temperature difference between the sample and the reference object △T, with the temperature difference △T on the temperature T graph can be obtained a differential thermal analysis curve, the thermal analysis curve called differential thermal spectrum, The specific heat capacity and Tg of the glass transition temperature of the sample can be analyzed from the differential thermal spectra.

Differential Scanning Calorimeter (Differential Scanning Calorimeter) measures the relationship between temperature and heat flow related to the internal thermal transition of materials, which is used in a wide range, especially in the research and development of materials, performance detection and quality control. Material properties, such as glass transition temperature, cold crystallization, phase transition, melting, crystallization, product stability, curing/crosslinking, oxidation induction period, etc., are the study areas of differential scanning calorimeter.

Application: curing reaction temperature and thermal effect of polymer materials, substance phase transition temperature and thermal effect measurement, crystallization of polymer materials, melting temperature and thermal effect measurement, glass transition temperature of polymer materials.

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