Thermal
characteristics of novel NaH2PO4/NaHSO4
flame retardant system for polyurethane foams |
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| Authors: | K Kulesza K Pielichowski Z Kowalski |
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| Institution: | (1) Dipartimento di Scienze Ambientali, Università della Tuscia, Viterbo, Italy, 01100;(2) Dipartimento di Chimica, Università 'La Sapienza', Roma, Italy, 00185 |
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| Abstract: | The thermal decomposition
of iminodiacetic, oxydiacetic, and thiodiacetic acids in helium atmosphere
has been studied by means of thermogravimetry (TG), differential thermal analysis
(DTA) and temperature-programmed pyrolysis directly coupled with mass spectrometry
(TPPy-MS). Evolved gas analysis (EGA) profiles of iminodiacetic and oxydiacetic
acids were obtained and compared with TG and DTA profiles.
The decomposition
of iminodiacetic acid forms water, CO, CO2, CH3CN,
HCN and some hydrocarbons. After water evolution a cyclic anhydride is formed,
as well as for oxydiacetic acid. Thiodiacetic acid vaporizes without decomposition. |
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| Keywords: | decomposition mechanism differential thermal analysis simultaneous thermogravimetry temperature-programmed pyrolysis-mass spectrometry (TPPy-MS) thermal decomposition |
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