Thermal decomposition of 3,4-bis(4'-aminofurazano-3') furoxan.
The thermal decomposition of 3,4-bis(4'-aminofurazano-3') furoxan (BAFF) was studied by DSC, TG, the combination technique of in situ thermolysis cell with rapid-scan Fourier transform infrared spectroscopy (thermolysis/RSFT-IR) and the fast thermolysis probe with rapid-scan Fourier transform infrared spectroscopy (fast thermolysis/RSFT-IR). The result shows that the melting point of BAFF is 168.4 degrees C, the peak temperatures of the two exothermic peaks are respectively 260.4 degrees C and 338.8 degrees C on DSC curve. The apparent activation energy E(a) and the pre-exponential factor A are respectively 122.21 kJ mol(-1) and 10(9.89)s(-1) for major exothermic decomposition process of BAFF. The kinetic equation of major exothermic decomposition for BAFF is dalpha/dt=10(10.07)exp(-1.46993 x 10(4)/T)(1-alpha) [-ln(1-alpha)](1/3). The thermal decomposition gaseous products of BAFF consist of CO(2), NO(2), N(2)O and NO. The BAFF is shown by IR spectroscopy to convert to ammonium dicyanamide (NH(4)[N(CN)(2)]), cyclic azine residues (melamine or melamine-like).
Zheng
Wei
W
Xi'an Modern Chemistry Research Institute, ZhangBa East Road No 168, Yan Ta District, Xi'an, Shanxi 710065, PR China. zhei_wei035991@yahoo.com.cn
Wang
Jiangning
J
Ren
Xiaoning
X
Chen
Zhiqun
Z
Tian
Jun
J
Zhou
Yanshui
Y
D002152:Calorimetry, Differential Scanning; D005740:Gases; D006358:Hot Temperature; D010069:Oxadiazoles / Q000737:chemistry*; D013816:Thermodynamics; D014227:Triazines
C528141:1,2,5-oxadiazole 2-oxide; D005740:Gases; D010069:Oxadiazoles; D014227:Triazines; C010166:furoxans; C011907:melamine