Kinetic analysis of the multistep thermal decomposition of Maya Blue-type pigments to evaluate thermal stability

Yamamoto, Yui; Okazaki, Takahiro; Sakai, Yasuhiro; Iwasaki, Shun; Koga, Nobuyoshi

doi:10.1007/s10973-020-09278-7

Cited by 8 publications

(2 citation statements)

References 79 publications

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“…In the past decade, thermal analysis has been widely used in a wide range of fields, including inorganic substances [ 18 ], pigments [ 19 ], explosives [ 20 , 21 , 22 ], energetic materials [ 23 , 24 , 25 , 26 ], polymers [ 27 , 28 , 29 , 30 , 31 , 32 ], nanocomposites [ 33 ], and biomass materials [ 34 , 35 ]. The main techniques used for sample measurements are differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA).…”

Section: Thermokinetic Analysis Methodsmentioning

confidence: 99%

Thermal Hazard Analysis of Two Non-Ideal Explosives Based on Ammonium Perchlorate/Ammonium Nitrate and Aluminium Powder

Guo,

Chen,

et al. 2024

Molecules

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In recent years, various kinds of civil explosive detonation accidents have occurred frequently around the world, resulting in substantial human casualties and significant property losses. It is generally believed that thermal stimulation plays a critical role in triggering the detonation of explosives; consequently, the study of the thermal hazards of explosives is of great significance to many aspects of safety emergency management practices in the production, transportation, storage, and use of explosives. It is known that the thermal stability of the ammonium perchlorate-aluminium system and the ammonium nitrate-aluminium system has been extensively investigated previously in the literature. However, there is a paucity of research on the thermal hazard characteristics of non-ideal explosives under varying oxygen balance conditions within the academic sphere. Therefore, this research focused on the study of the thermal hazards of non-ideal explosives based on thermokinetic analysis. The thermal hazards of non-ideal explosive mixtures of ammonium perchlorate and aluminium and of ammonium nitrate and aluminium were studied by thermal analysis kinetics. The thermokinetic parameters were meticulously studied through differential scanning calorimetry (DSC) analysis. The results showed that the peak reaction temperature and activation energy of the ammonium perchlorate-aluminium system were significantly higher than those of the ammonium nitrate-aluminium system. Under the condition of zero oxygen balance, the peak reaction temperature of the ammonium nitrate-aluminium system was 259 °C (heating rate 5 °C/min), and the activation energy was 84.7 kJ/mol. Under the same conditions, the peak reaction temperature and activation energy of the ammonium perchlorate-aluminium system were 292 °C (heating rate 5 °C/min) and 94.9 kJ/mol, respectively. These results indicate that the ammonium perchlorate-aluminium system has higher safety under the same thermal stimulation conditions. Furthermore, research on both non-ideal explosive systems reveals that the activation energy is at its peak under negative oxygen balance conditions, recorded at 104.2 kJ/mol (ammonium perchlorate-aluminium) and 86.2 kJ/mol (ammonium nitrate-aluminium), which indicates a higher degree of safety. Therefore, the investigation into the thermal hazards of non-ideal explosive systems under different oxygen balance conditions is of utmost importance for the enhancement and improvement of safety emergency management practices.

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Section: Thermokinetic Analysis Methodsmentioning

confidence: 99%

Thermal Hazard Analysis of Two Non-Ideal Explosives Based on Ammonium Perchlorate/Ammonium Nitrate and Aluminium Powder

Guo,

Chen,

et al. 2024

Molecules

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“…Chen et al 30 reported the preparation of a hybrid pigment based on Sep and Basic red 46 XL-GRL where the XL-GRL was adsorbed on the Sep via electrostatic attraction or encapsulated in the Sep channels depending of the preparation method. Yamamoto et al 42 studied the thermal behavior of hybrid pigments prepared using Sep and palygorskyte with methyl red and alizarin as red and yellow dyes, respectively.…”

Section: Introductionmentioning

confidence: 99%