Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 107, Issue 1, Pages 339-346Publisher
WILEY
DOI: 10.1002/app.26922
Keywords
chemical blowing agent; azodicarbonamide; degradation kinetics
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The transitions and reactions involved in the thermal treatment of several commercial azodicarbonamides (ADC) in an inert atmosphere have been studied by dynamic thermogravimetry analysis (TGA), mass spectrometry and Fourier transform infrared (FTIR) spectroscopy. A pseudo-mechanistic model, involving several competitive and non-competitive reactions, has been suggested and applied to the correlation of the weight loss data. The model applied is capable of accurately representing the different processes involved, and can be of great interest in the understanding and quantification of such phenomena, including the simulation of the instantaneous amount of gases evolved in a foaming process. In addition, a brief discussion on the methodology related to the mathematical modeling of TGA data is presented, taking into account the complex thermal behaviour of the ADC. (C) 2007 Wiley Periodicals, Inc.
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