Today we introduce the Differential Scanning Calorimeter DSC and Synchronous Thermal Analyzer STA
1. Introduction of the Differential Scanning Calorimeter DSC
Differential scanning calorimetry (DSC), a thermal analysis method. At a programmed temperature, measure the relationship between the power difference(eg, in the form of heat) input to the sample and reference and the temperature. The curve recorded by the differential scanning calorimeter is called the DSC curve. It takes the rate of heat absorption or exotherm of the sample, that is, the heat flow rate dH/dt (unit mJ/s), as the ordinate, and the temperature T or time t as the horizontal axis. Coordinates, which can measure various thermodynamic and kinetic parameters, such as specific heat capacity, heat of reaction, heat of transition, phase diagram, reaction rate, crystallization rate, polymer crystallinity, sample purity, etc.
A method of DSC thermal analysis. It is an analytical method for measuring the energy difference between the sample and the reference as a function of temperature under the condition of programmed temperature. Differential scanning calorimetry has two types: compensation type and heat flow type. In differential scanning calorimetry, the relationship between the amount of heat and temperature that must be applied per unit time in order to keep the temperature difference between the sample and the reference at zero is the DSC curve. The vertical axis of the curve is the amount of heating per unit time, and the horizontal axis is the temperature or time. The area of the curve is proportional to the change in enthalpy. DSC has the same principle as DTA, but the performance is better than that of DTA. It can be used to study biofilm structure and function, protein and nucleic acid conformational changes, etc.
（二）Classification of the Differential Scanning Calorimeter DSC
（1）Power Compensation DSC
DSC is a dynamic calorimetry technology, and the important calibrations for DSC instruments are temperature calibration and calorimetric calibration.
Our AT451 Differential Scanning Calorimeter (DSC) is used to determine and research the melting and crystallization process, glass transition temperature, oxidation induction time (OIT), reaction heat, heat enthalpy, melting point, phase transition, etc. With high DSC sensitivity, up to 0.001μW and the cooling system. L arge LCD display, touch screen operation.
2. Introduction of the Synchronous Thermal Analyzer STA
Simultaneous thermal analysis combines thermogravimetric analysis (TG) with differential thermal analysis (DTA) or differential scanning calorimetry DSC. Thermogravimetric and differential thermal information can be obtained simultaneously using the same sample in the same measurement.
According to whether a certain thermal effect corresponds to a mass change, it is helpful to identify the physicochemical process corresponding to the thermal effect (such as distinguishing melting peaks, crystallization peaks, phase transition peaks and decomposition peaks, oxidation peaks, etc.).
Knowing the current actual mass of the sample at the reaction temperature facilitates accurate calculation of the reaction enthalpy.
Widely used in ceramics, glass, metals/alloys, minerals, catalysts, energetic materials, plastic polymers, coatings, medicine, food and other fields.
Compared to TG or DSC testing alone, STA has the following significant advantages:
Eliminate the influence of factors such as weighing weight, sample uniformity, heating rate consistency, atmospheric pressure and flow difference, and the correspondence between TG and DTA/DSC curves is better.
The following properties of the study material:
DSC: melting, crystallization, phase transition, reaction temperature and heat of reaction, heat of combustion, specific heat, etc.
TG: calculation of thermal stability, decomposition, redox, adsorption and desorption, free water and crystal water content, and composition ratio.
Our AT453 model Synchronous Thermal Analyzer combined the thermogravimetric analysis TG with differential thermal analysis DTA or differential scanning calorimeter DSC, and TG and DTA or DSC are obtained by the same sample in the same measurement. With 7 inch full color 24bit touch screen.
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