Thermal gravimetric (or thermogravimetric) analysis (TGA) is an analysis technique for quantifying the thermal stability of materials. In the simplest terms, the sample is heated upon a precision scale, and the change in mass over time is measured. This can measure the thermal stability of polymers, as well as the effects of combustion or pyrolysis reactions.

TGA can be performed under vacuum, open to air, or in a controlled environment. Here is an example setup for this process:

TGA Balance Diagram
Source: Polymer Innovation Blog

The sample sits in a platinum container. An MFC sends a purge gas (in this case, N2) into the furnace at a constant flow rate, and the change in mass is measured.

APPLICATION NOTES
Controlling up to 60 SCCM of N2 for thermal gravimetric analysis. The device is similar to an existing unit.

OPERATING CONDITIONS
— Flow: 0 – 60 SCCM
— Gas: N2
— P1: 1 barG

REPRESENTATIVE PART NUMBERS FOR THIS APPLICATION
— MC-50SCCM-D-PCV03 / 5M, RIN, 5IN, GAS: N2, RANGE (60 SCCM), P1: 1 barG, P2: ATM
— BB3-232
— SS-400-1-0256

 

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