The Effect of HMX Impurity and Irganox Antioxidant on Thermal Decomposition Kinetics of RDX by TG/DSC Non‐Isothermal Method

Sinapour, Hamid; Damiri, Sajjad; Ravanbod, Mohsen; Pouretedal, Hamid Reza

doi:10.1002/prep.201800236

Cited by 15 publications

(11 citation statements)

References 27 publications

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“…Irganox 1010 decomposition has been evaluated by numerous groups in diverse areas of research; 10,14–16 yet the decomposition pathways of Irganox 1010 have been minimally evaluated 3,16–19 . Pioneering work by Beißman et al 17 investigated Irganox 1010 decomposition products in polypropylene and squalene.…”

Section: Introductionmentioning

confidence: 99%

“…Irganox 1010 decomposition has been evaluated by numerous groups in diverse areas of research; 10,14-16 yet the decomposition pathways of Irganox 1010 have been minimally evaluated. 3,[16][17][18][19] Pioneering work by Beißman et al 17 investigated Irganox 1010 decomposition products in polypropylene and squalene. They identified 27 compounds from the decomposition of Irganox 1010 in a semi-targeted approach as well as discovered previously unknown degradation pathways.…”

Section: Introductionmentioning

confidence: 99%

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Decomposition of Irganox 1010 in plastic bonded explosives

Freye

2022

J of Applied Polymer Sci

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Degradation pathways of Irganox 1010 in aged plastic bonded explosive (PBX) 9501 were investigated using ultrahigh performance liquid chromatography coupled to quadrupole time of flight mass spectrometry (UHPLC-QTOF). Using a targeted approach, a total of 44 Irganox 1010 decomposition products were discovered. These decomposition products were formed through hydrolysis, scission, and/or oxidation of Irganox 1010. The hydrolytic decomposition of Irganox is a straightforward process resulting in the cleavage of the ester group(s) while oxidation and scission are more complicated and can happen at multiple locations on the Irganox 1010 molecule. Moreover, due to the symmetric nature of Irganox 1010, multiple decomposition reactions can occur. Indeed some decomposition products exhibited hydrolysis, oxidation, and scission. In order to probe any trends in the aged PBX 9501 samples, principal component analysis (PCA) was implemented. The greatest chemical differences between the aged PBX samples was hydrolysis of the ester functional groups on Irganox 1010. Despite the negative connotations of hydrolysis, the Irganox 1010 decomposition products are still able to function as a radical scavenger in PBX 9501 as intended.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decomposition of Irganox 1010 in plastic bonded explosives

Freye

2022

J of Applied Polymer Sci

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“…The risk of thermal decomposition of these substances were be studied. The effects of acid 6 , alkali 7 , metal ion 8 , organic matter 9 on the thermal decomposition process of these substances were be researched, etc.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

Fan

yixiu

Miaowen

et al. 2022

Sci Rep

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Abstract1-nitroso-2-naphthol has thermal instability of thermal decomposition, spontaneous combustion and even explosion. Its thermal decomposition characteristics were tested by synchronous thermal analyzer (TGA/DSC); The activation energy of the thermal decomposition process was calculated by Kissinger method; The infrared absorption characteristic spectra of the gas products produced in the thermal decomposition process were measured by TGA/DSC-FTIR, and the thermal decomposition reaction process was speculated. The results show that the initial temperature (Tonset) of TGA exothermic decomposition of 1-nitroso-2 naphthol is between 129.01 and 155.69 °C, and the faster the heating rate(β), the higher the Tonset, but the faster the thermal decomposition rate, the greater the heat release and the worse the thermal stability. The activation energy (E) of the thermal decomposition process is 83.323 kJ/mol calculated by Kissinger method. The dynamic test results of TGA/DSC-FTIR show that the main reaction of 1-nitroso-2 naphthol during heating is intermolecular dehydration to form ether, and the secondary reaction is decomposition into aliphatic nitro compounds, carbonyl compounds and amines. Sodium hydroxide will reduce the thermal stability of 1-nitroso-2 naphthol. After adding sodium hydroxide, the thermal decomposition process of 1-nitroso-2 naphthol has changed. The main reaction is that 1-nitroso-2-naphthol reacts with sodium hydroxide to produce sodium nitrophenol, which is further decomposed into aliphatic nitro compounds. The research results have guiding significance for finding the reasonable conditions and temperature of 1-nitroso-2 naphthol during storage and transportation.

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“…Due to the low detection sensitivity of instrument or open system that causes sample evaporation [15], the decomposition of RDX was usually approximated as a single step reaction. Hamid Sinapour et al [16] used open crucibles to perform DSC tests on RDX at different heating rates. Then the reaction model which is following the type of R3 was determined by nonlinear model fitting method.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of Liquid Phase RDX Thermal Decomposition Process and its Application in the Slow Cook‐Off Test Prediction

Zhao

et al. 2021

Propellants Explo Pyrotec

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RDX is an important and commonly used energetic material. The understanding thermal decomposition process of RDX is of great significance for the safety of its production, storage, and use. However, due to the coupling of phase transition and thermal decomposition process, a multi-step kinetic model including melting and decomposition process has not been established so far, which is not helpful to the prediction of its thermal behavior in different conditions. In this paper, Differential Scanning Calorimetry was used to measure the decomposition characteristics of RDX at different heating rates. A four-step consecutive reaction model A!A liq !B!C!D was established to depict the melting and decomposition process. Then quench and reheat experiments were performed to determine the types of each step, where the reaction types are autocatalytic except that the step of B!C is an N-order reaction. The model was used to predict the result of slow cook-off test. It was found that the predicted time of thermal explosion is 0.2 h earlier than the experiment and the onset temperature is 0.6°C smaller than experiment, which verifies the rationality of the kinetic model.

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The Effect of HMX Impurity and Irganox Antioxidant on Thermal Decomposition Kinetics of RDX by TG/DSC Non‐Isothermal Method

Cited by 15 publications

References 27 publications

Decomposition of Irganox 1010 in plastic bonded explosives

Decomposition of Irganox 1010 in plastic bonded explosives

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

Kinetic Modeling of Liquid Phase RDX Thermal Decomposition Process and its Application in the Slow Cook‐Off Test Prediction

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