Vacuum Thermogravimetric Analysis

Exceptional Low Pressure TGA Services

FAI has the rare ability to perform Vacuum Thermogravimetric Analysis (Vac-TGA). Vacuum TGA allows a sample to be analyzed at pressure conditions as low as 5.0 torr (0.0066 atm) for customer’s applications that require reduced pressure conditions in their usage. This technique is used to solve highly specialized problems in industries where low pressure is encountered during service. Vac-TGA also gives you a more accurate look into volatiles, degradation, and off-gassing of materials such as films, composites, epoxies, and more. Vacuum TGA analysis establishes extrinsic values that provide a solid understanding of how a sample will react in the conditions applied to it in the industrial setting.

By running the same sample in normal atmospheric pressure and again under vacuum, we are able to differentiate volatization from degradation. Components that volatize will leave the sample at relatively low temperatures. Degradation is essentially unaffected by the vacuum as compared to a high purity inert gas such as nitrogen.

Further Applications: Vapor Pressure Curves

Thermal Gravimetric Analysis (TGA) run at controlled levels of vacuum also allows the generation of Vapor Pressure Curves for liquids. These fundamental properties are needed for chemical engineering applications, aerospace applications and for anything where a vacuum can be encountered in service.

Since our Mettler Toledo TGA 850 collects heat flow information (SDTA) we can determine when samples boil. The endothermic onset as well as sample weight loss signal the boiling point. Example vapor pressure curves are shown below.

Further Applications: Vapor Pressure Curves

Thermal Gravimetric Analysis (TGA) run at controlled levels of vacuum also allows the generation of Vapor Pressure Curves for liquids. These fundamental properties are needed for chemical engineering applications, aerospace applications and for anything where a vacuum can be encountered in service.

Since our Mettler Toledo TGA 850 collects heat flow information (SDTA) we can determine when samples boil. The endothermic onset as well as sample weight loss signal the boiling point. Example vapor pressure curves are shown below.