A general approach for temperature modulated thermogravimetry: Extension to non-periodical and event-controlled modulation

• The temperature modulated TGA technique is expanded to non-periodic modulation functions.
• The use of a stochastic modulation function is tested.
• The concept of the new technique, the event controlled temperature modulated TGA is introduced.
• The event control adapted the intensity of the modulation function and the characteristic modulation time. The result is an optimized modulation.

Sinusoidal temperature modulated thermogravimetric analysis (TMTGA) has been proposed to get kinetic data on reactions that were investigated by TGA 45 years ago by Flynn and later by Blaine and Hahn. Because of general uncertainties of this technique, we developed a generalized approach for TMTGA using any modulation function, i.e., periodic as well as non-periodic. As a consequence of an error discussion of a TMDSC experiment, we present a new concept of the event controlled modulation function.

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