Toward reliable characterization of energetic materials: interplay of theory and thermal analysis in the study of the thermal stability of tetranitroacetimidic acid (TNAA)

2018 ◽  
Vol 20 (46) ◽  
pp. 29285-29298 ◽  
Author(s):  
Vitaly G. Kiselev ◽  
Nikita V. Muravyev ◽  
Konstantin A. Monogarov ◽  
Pavel S. Gribanov ◽  
Andrey F. Asachenko ◽  
...  

Kinetics and mechanism of thermal decomposition of tetranitroacetimidic acid, a novel green energetic material, were studied using complementary thermoanalytical methods (DSC and TGA) and quantum chemistry (CCSD(T)-F12).

2018 ◽  
Vol 39 (4) ◽  
pp. 21
Author(s):  
Gilbert Bannach ◽  
Rafael R. Almeida ◽  
Luis G. Lacerda ◽  
Egon Schnitzler ◽  
Massao Ionashiro

Several papers have been described on the thermal stability of the sweetener, C12H19Cl3O8 (Sucralose). Nevertheless no study using thermoanalytical techniques was found in the literature. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC) and infrared spectroscopy, have been used to study the thermal stability and thermal decomposition of sweetener.


2013 ◽  
Vol 423-426 ◽  
pp. 588-592
Author(s):  
Yong Kang Chen ◽  
Ming Hua Chen ◽  
Tao Zhang ◽  
Xiao Le Wu

Differential Scanning Calorimetry (DSC) is a common and useful method for thermal analysis. This paper briefly introduces the thermal decomposition characteristic determination of the main components of propellant by DSC assay and the applications of DSC in thermal stability and compatibility evaluation research of energetic materials.


2012 ◽  
Vol 490-495 ◽  
pp. 3698-3702
Author(s):  
Su Xia Zhang ◽  
Yi Hong Tang ◽  
Yan Lu ◽  
Ya Ming Niu

Six new poly(aryl ether sulfone)s were synthesized from 1,5-, 2,6- and 2,7- Bis-(4-fluorosulfonyl)naphthalene isomers with different diphenol. The structure of the poly(aryl ether sulfone)s were characterized by IR spectroscopy and elemental analysis, and the results were in good agreement with the expected structures. The glass transition temperatures were found to be in the range 219-236oC by DSC thermal analysis. The WAXD and thermogravimetric analyses revealed amorphous morphology and excellent thermal stability of the polymers.


2017 ◽  
Vol 19 (1) ◽  
pp. 436-449 ◽  
Author(s):  
Nikita V. Muravyev ◽  
Konstantin A. Monogarov ◽  
Andrey F. Asachenko ◽  
Mikhail S. Nechaev ◽  
Ivan V. Ananyev ◽  
...  

Reliable kinetics of thermolysis for a novel explosive dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50) was obtained using a variety of thermoanalytical and kinetic methods and verified by modeling of adiabatic self-heating.


Nano Hybrids ◽  
2014 ◽  
Vol 8 ◽  
pp. 39-56 ◽  
Author(s):  
Zuhailimuna Muda ◽  
Norhayati Hashim ◽  
Nur Hidayah Yusri ◽  
Illyas Md Isa ◽  
Azlan Kamari ◽  
...  

Zn/Al layered double hydroxide (LDH) intercalated by an anionic phenoxyherbicide guest, 3-(4-methoxypheny) propionate (MPP) were prepared by ion-exchange method. Power XRD and FTIR shows that the MPP phenoxyherbicide were successfully intercalated into the LDH interlayer. The basal spacing for Zn/Al layered double hydroxide-3-(4-methoxyphenyl) propionate nanocomposite (LDH-MPP) was 18.7 Å - 20.5 Å for 0.015 M, 0.025 M, and 0.050 M of MPP, respectively. Thermal analysis shows that the thermal stability of MPP was improved by the intercalation into the LDH interlayer. The results were also supported by elemental analysis and the surface morphology of this nanocomposite.


1971 ◽  
Vol 54 (5) ◽  
pp. 1200-1210 ◽  
Author(s):  
G A Neville ◽  
J C Ethier ◽  
N F H Bright ◽  
R H Lake

Abstract The relative thermal stability of lincomycin. HCl.H2O, lincomycin cyclamate, calcium cyclamate.2H2O, and sodium cyclamate was studied by differential thermal analysis and by thermogravimetric analysis. Lincomycin. HCl.H2O easily undergoes thermal degradation with the release of methyl mercaptan, but the cyclamate anion confers considerably greater thermal stability on the lincomycin moiety. Calcium cyclamate.2H2O was found to undergo a 2-step thermal dehydration analogous to that undergone by CaSO4.2H2O, including termination in the formation of CaSO4· Grating infrared spectra are reproduced for lincomycin.HCl.H2O, cyclohexylsulfamic acid (cyclamic acid), sodium cyclamate, and calcium cyclamate.2H20. Principal group frequencies are assigned with the aid of deuterium exchange studies and thermal dehydration limits. Infrared characteristics of derivatives of sulfamic acid are described for the first time and evidence is presented for the trans amide configuration in lincomycin. HCl.H2O.


2019 ◽  
Vol 19 (11) ◽  
pp. 7493-7501 ◽  
Author(s):  
Sheng Xu ◽  
Min Zhang ◽  
Siyu Li ◽  
Moyu Yi ◽  
Shigen Shen ◽  
...  

P3O5-10 pillared Mg/Al hydrotalcite (HTs) as a functional fire-retarding filler was successfully prepared by impregnation-reconstruction, where the HTs was used to prepare polypropylene (PP) and HTs composite (PP/HTs). Thermal decomposition was crucial for correctly identifying the thermal behavior for the PP/HTs, and studied using thermogravimetry (TG) at different heating rates. Based on single TG curves and Málek method, as well as 41 mechanism functions, the thermal decompositions of the PP/HTs composite and PP in nitrogen atmosphere were studied under non-isothermal conditions. The mechanism functions of the thermal decomposition reactions for the PP/HTs composite and PP were separately “chemical reaction F3” and “phase boundary reaction R2,” which were also in good agreement with corresponding experimental data. It was found that the addition of the HTs increased the apparent activation energy Ea of the PP/HTs comparing to the PP, which improved the thermal stability of the polypropylene. A difference in the set of kinetic and thermodynamic parameters was also observed between the PP/HTs and PP, particularly with respect to lower ΔS≠ value assigned to higher thermal stability of the PP/HTs composite.


Calphad ◽  
2021 ◽  
Vol 73 ◽  
pp. 102258
Author(s):  
František Zelenka ◽  
Jakub Strádal ◽  
Pavel Brož ◽  
Jan Vřešťál ◽  
Jiří Buršík ◽  
...  

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