Differential scanning calorimetry (DSC) is a widely used technique. Differential scanning calorimeter is not only a routine quality testing tool, but also a research tool. What is measured is the relationship between temperature and heat flow related to the thermal transition inside the material. The instrument of our company is heat flow type differential scanning calorimeter, which has the characteristics of good repeatability and high accuracy, and is especially suitable for accurate measurement of specific heat. The equipment is easy to calibrate, low melting point, fast and reliable, and has a wide range of applications, especially in material research and development, performance testing 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 research areas of DSC.

The application scope of differential scanning calorimeter is: the determination of the oxidation induction time of materials, the curing reaction temperature and thermal effect of polymer materials, the phase change temperature and its thermal effect, the crystallization of polymer materials, the melting temperature and its thermal effect, the glass transition temperature of polymer materials, etc. The experimental objects are: solid, liquid, viscous sample, except gas.

The sample and reference material are put into the crucible and placed in the furnace for programmed heating to change the temperature of the sample and reference material. If the heat capacity of the reference substance and the sample are the same, and the sample has no thermal effect, then the temperature difference between them is nearly "zero", and a smooth curve is obtained. With the increase of temperature, the sample produces thermal effect, while the reference material does not produce thermal effect, so there is a temperature difference between the two, which is shown as a peak in the DTA curve. The larger the temperature difference is, the larger the peak will be, and the more times of temperature difference changes, the more the peak number will be. The peak upward is called exothermic peak, and the peak downward is called endothermic peak.