What is thermal analysis of material?
Thermal analysis is the application of a precision controlled temperature program that allows quantification of a change in a material’s properties with change in temperature (23).
What are different types of thermal analysis?
Thermal Analysis Techniques
- THERMOGRAVIMETRIC ANALYSIS (TGA)
- THERMOGRAVIMETRIC ANALYSIS WITH EVOLVED GAS ANALYSIS (TG-EGA)
- DIFFERENTIAL SCANNING CALORIMETRY (DSC)
- THERMOMECHANICAL ANALYSIS (TMA)
- DYNAMIC MECHANICAL ANALYSIS (DMA)
What is the principle of DSC?
The basic principle underlying this technique is that when the sample undergoes a physical transformation such as phase transitions, more or less heat will need to flow to it than the reference to maintain both at the same temperature.
What is thermal method of analysis?
Thermal analysis is a general term defining a technique used to analyze the time and temperature at which physical changes occur when a substance is heated or cooled. Each technique is defined according to the types of physical changes being analyzed.
What are thermal events of materials?
Thermal analysis relies on material reactions to thermal energy flow in or out of solids. The thermal events examined by DTA and DSC include solid phase transformation, glass transition, crystallization and melting.
Why thermal analysis is used?
Thermal analysis (DSC and TGA) was used to determine temperatures at which drug decomposition occurred and temperatures at which the polymers or polymer blends would melt which is critical in predicting extrusion temperatures that will assure polymer melting yet reduce drug degradation.
What are two techniques for thermal analysis *?
Explanation: The two main thermal analysis techniques are thermogravimetric analysis known as TGA which measures the change in weight with temperature and Differential thermal analysis known as DTA which detects changes in heat content.
How does DSC help in materials Characterisation?
DSC also measures the rate of heat flow and compares differences between the heat flow rate of the test sample and known reference materials. The difference determines variations in material composition, crystallinity and oxidation.
What is TGA and DSC?
In brief, a TGA instrument measures a sample’s mass as it’s heated or cooled; DSC measures how much energy a sample absorbs or releases during heating or cooling. When using them together, the “’bonus information essentially labels what type of reaction produced a given signal,” Sanders says.
What are different factors affecting the thermal analysis?
Sample Parameters The major factors that affect thermal analytical data are related to the shape, size, and weight of the sample. Samples are preferably in a powder or particle form, smaller than 0.1 mm in diameter.
Why is thermal analysis important?
Thermal analysis, as it typically records a physical property as a function of temperature and time, is an ideal method for recording the phase behaviour and stability of an API2,3.