Abstract
Metastable mapping was applied to the analysis of the mixture of the pyrolysis products obtained from an aromatic polyamide, pyrolysed directly in a mass spectrometer. This technique permits a rapid analysis of the components and provides a method for assigning structures through the study of molecular ions, characteristic fragmentations and comparisons of daughter and parent ions of authentic samples. Collisionally activated decomposition spectra were always obtained in order to induce a higher intensity in the metastable transition. The thermal decomposition mechanism of the aromatic polyamide investigated here occurs via an intramolecular exchange and a concomitant N-H hydrogen transfer process with the formation of compounds with amine and/or succinimide end-groups.
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