Thermal properties of TEX decomposition or sublimation

Katarzyna Gańczyk , Angelika Zygmunt , Tomasz Gołofit

Abstract

TEX is a thermostable compound and less sensitive to external stimuli. It sublimates and decomposes at high temperature. The influence of DSC and TG measurement conditions and substance mass on the thermal decomposition of TEX was determined. It was observed that substance mass, pan type and fulfillment degree of pan influence the thermal decomposition and kinetic parameters of TEX decomposition. Sublimation of the sample was the main observed process; thermal decomposition was the secondary process during the heating of TEX in open pans. With increasing substance mass, the participation of thermal decomposition of TEX increased. Uncontrolled thermal decomposition was observed for larger mass of a sample. The sublimation and decomposition processes were confirmed by FT-IR method. Thermal decomposition was the main process observed during heating the sample of TEX in hermetic pans. Sublimation of a sample was marginal. The sublimation effect decreased with increasing the degree of fulfillment pan. The kinetic parameters were determined with the Friedman’s isoconversional method. The conversion, mass of sample and the type of pan caused the large changes in the values of kinetic parameters. The apparent activation energy varied from 128 to 355 kJ mol−1 and logA varied from 9.95 to 30.64 in initial step (α = 0.02) for different condition of measurements. The low values of apparent activation energy (about 130 kJ mol−1) were associated with sublimation process and the high values (about 340 kJ mol−1) with the decomposition process.
Author Katarzyna Gańczyk ZMW
Katarzyna Gańczyk,,
- Department Of High-Energetic Materials
, Angelika Zygmunt ZMW
Angelika Zygmunt ,,
- Department Of High-Energetic Materials
, Tomasz Gołofit ZMW
Tomasz Gołofit,,
- Department Of High-Energetic Materials
Journal seriesJournal of Thermal Analysis and Calorimetry, ISSN 1388-6150
Issue year2016
Vol125
No2
Pages967-975
Publication size in sheets0.5
Keywords in EnglishThermal decomposition ; 4,10-Dinitro- 2,5,8,12-tetraoxy-4,10- diazotetracyclo[5.5.0.0 5,9 0 3,11 ]dodecane (TEX) ; DSC ; TG ; Kinetic parameters ; Sublimation process
DOIDOI:10.1007/s10973-016-5476-9
URL http://link.springer.com/article/10.1007/s10973-016-5476-9
Languageen angielski
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wdpb_publikacje_pliki_plik_publikacja_2846_org.pdf 1.36 MB
Score (nominal)25
ScoreMinisterial score [Punktacja MNiSW] = 20.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) [Punktacja MNiSW (2013-2016)] = 25.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2016 = 1.953 (2) - 2016=1.69 (5)
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