Study of the induction period of the thermal decomposition of irradiated barium bromate

1985 ◽  
Vol 95 (5) ◽  
pp. 291-299 ◽  
Author(s):  
N. Bohidar ◽  
B. Jena ◽  
S. R. Mohanty
Keyword(s):  
Thermal Decomposition ◽  
Induction Period

scholarly journals Solid-Phase Thermal Decomposition of 2,4-Dinitroimidazole (2,4-DNI)

1995 ◽  
Vol 418 ◽  
Author(s):  
Leanna Minier ◽  
Richard Behrens ◽  
Suryanarayana Bulusu
Keyword(s):  
Thermal Decomposition ◽  
Induction Period ◽  
Solid Phase ◽  
Low Molecular Weight ◽  
Ftir Analysis ◽  
Pyrolysis Products ◽  
Gaseous Products ◽  
Elemental Formula ◽  
Gas Formation ◽  
Primary Products

AbstractThe solid-phase thermal decomposition of the insensitive energetic aromatic heterocycle 2,4- dinitroimidazole (2,4-DNI: mp 265–274°C) is studied utilizing simultaneous thermogravimetric modulated beam mass spectrometry (STMBMS) between 200° and 247°C. The pyrolysis products have been identified using perdeuterated and N-labeled isotopomers. The products consist of low molecular-weight gases and a thermally stable solid residue. The major gaseous products are NO, CO2, CO, N2, HNCO and H2O. Minor gaseous products are HCN, C2N2, NO2, C3H4N2, C3H3N3O and NH3. The elemental formula of the residue is C2HN2O and FTIR analysis suggests that it is polyurea- and polycarbamate-like in nature. The rates of formation of the gaseous products and their respective quantities have been determined for a typical isothermal decomposition experiment at 235°C. The temporal behaviors of the gas formation rates indicate that the overall decomposition is characterized by a sequence of four events; 1) an early decomposition period induced by impurities and H2O, 2) an induction period where CO2 and NO are the primary products formed at relatively constant rates, 3) an autoacceleratory period that peaks when the sample is depleted and 4) a final period in which the residue decomposes. Arrhenius parameters for the induction period are Ea = 46.9 ± 0.7 kcal/mol and Log(A) = 16.3 ± 0.3. Decomposition pathways that are consistent with the data are presented.

scholarly journals THE EFFECT OF FISH BONE ON THE DEVELOPMENT OF DENDRITES IN POLYETHYLENE AT BREAKDOWN VOLTAGE

2021 ◽  
Vol 5 (1(82)) ◽  
pp. 42-45
Author(s):  
E. Gojayev ◽  
Sh. Aliyeva ◽  
V. Salimova ◽  
Sh. Mekhtiyeva
Keyword(s):  
Thermal Decomposition ◽  
Electric Field ◽  
Induction Period ◽  
Breakdown Voltage ◽  
Strong Electric Field ◽  
Local Heating ◽  
Fish Bone ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Optimal Amount

The paper presents the results of a study of the effect of fish bone additives on the development of dendrites in low-density polyethylene during its breakdown. It was found that with the introduction of additives from fish bone in an optimal amount it promotes an increase in the induction period of the appearance of dendrites in lowdensity polyethylene, due to a slowdown in the process of the appearance of local heating near the tip in a strong electric field and the appearance of an initial defect due to thermal decomposition of the polymer.

Kinetics and mechanisms of the thermal decomposition of ethane - II. The reaction inhibited by nitric oxide

1961 ◽  
Vol 260 (1300) ◽  
pp. 103-113 ◽  
Keyword(s):  
Nitric Oxide ◽  
Activation Energy ◽  
Thermal Decomposition ◽  
Induction Period ◽  
Volume Ratio ◽  
Frequency Factor ◽  
Inflexion Point ◽  
Kcal Mole ◽  
First Order ◽  
Pressure Time

The pressure-time curves for the decomposition of ethane when fully inhibited by nitric oxide have initially a point of inflexion. The initial rates are proportional to the first power of the pressure at higher pressures, and to the 3/2 power at lower pressures; the rates at the inflexion point are proportional to the pressure to a power which is slightly greater than unity. The acti­vation energy corresponding to the initial rates in the first-order region was found to be 77∙5 kcal/mole, and the frequency factor 3∙12 × 10 15 s -1 . The reaction was slightly inhibited by increasing the surface: volume ratio, and the induction period disappeared on addition of ethylene. The facts are shown to be consistent with a mechanism in which initiation occurs by the reaction NO + C 2 H 6 → C 2 H 5 + HNO, which is estimated to have an activation energy of 52 kcal. At the beginning of the reaction and at lower pressures termination is con­sidered to occur by H + HNO → H 2 + NO; as ethylene accumulates the ratio [C 2 H 5 ]/[H] increases and the termination step becomes C 2 H 5 + HNO → C 2 H 6 + NO. The mechanism is shown to account for the fact that propylene and other inhibitors give rise to the same limiting rate.

Thermal decomposition of 2,4,6-trinitrotoluene during the induction period

1996 ◽  
Vol 275 (1) ◽  
pp. 27-36 ◽  
Author(s):  
A. Ksia̧żczak ◽  
T. Ksia̧żczak
Keyword(s):  
Thermal Decomposition ◽  
Induction Period
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