The use of thermogravimetric analysis is used to track and record changes in the specific properties of a sample material. The changes will include both the physical properties, such as changes in structure and phase transitions, as well as changes in the chemical properties of the material as the sample is exposed to increasing temperature in a controlled atmosphere.
The temperature increase is maintained by a constant heating rate to provide a uniform result that is repeatable. With the temperature increasing at the constant heating rating it is possible to detect sublimation, vaporization, absorption, and dehydration of the specific sample material. This constant heating rate is one of the critical factors in the system, as is the use of the latest in equipment and technology to record the changes and to effectively manage the testing process.
Uses to Consider
While there are many different applications that use TGA testing, it is most commonly used to complete full material characterization. This can include the degradation of a specific sample as well as the decomposition patterns that are exhibited.
The option to test for either or both organic and inorganic materials in a sample also makes TGA testing a good option for evaluating polymers and resins as well as for reverse engineering of unknowns. This is also a test that can be very effective in determining the thermal stability of a known or unknown material.
With most TGA testing, data will be presented on a graph. This graph will include the change of weight of the sample, which will be used to determine the various physical and chemical changes in the material.
The new thermogravimetric analysis equipment is extremely precise, allowing trained technicians to accurately record all required information about the performance of a given sample material during the testing process.