Dynamic pressure thermal analysis of double-base propellants containing RDX

Li, Rui; Zhang, Tonglai; Yang, Li; Zhou, Zunning

doi:10.2478/s11532-014-0524-4

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…RDX-based composite propellant has a large amount of gas generation without generating much smoke. The performance of solid rocket propellant is strongly dependent on the characteristics of thermal decomposition of RDX [3,4]. Researchers have done much work on studying how to improve the combustion performance by adjusting the particle characteristics of energetic materials [5].…”

Section: Introductionmentioning

confidence: 99%

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Han

Wang

et al. 2015

J Therm Anal Calorim

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Catalyst could significantly improve thermal decomposition performance of energetic materials. However, different approaches for dispersing catalyst into energetic materials lead to quite different results. Generally, improved homogeneity of the mixture always results in better performance. In this paper, a novel method was applied on synthesizing nanoceria; at the same time, electrospray method was introduced to produce homogenous RDX/ceria micropowder. The mixture was characterized and tested by scanning electron microscope-energy-dispersive spectroscopy and differential scanning calorimetry-thermogravimetry. Kissinger method was employed to calculate activation energy of different specimens according to DSC data. Results indicated that with electrospray formation, catalyst (nanoceria) could be evenly dispersed into RDX. In contrast to pure RDX, RDX/ceria mixture could decompose at a lower temperature and has lower activation energy. The calculation results of critical explosion temperature indicated that the mixture is safe for storage and process operation. This study points out a potential way to develop new method to make energetic/catalyst mixture.

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Section: Introductionmentioning

confidence: 99%

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Han

Wang

et al. 2015

J Therm Anal Calorim

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“…Dynamic pressure measuring thermal analysis (DPTA) is generally used to study the initial thermal decomposition at a constant low temperature in order to evaluate thermal stability. 30,31 1.0000 AE 0.0010 g of the sample was weighed and loaded in an explosion-proof glass test tube. Then, the tube was sealed and evacuated to an initial pressure of less than 0.10 kPa.…”

Section: Apparatus and Methodsmentioning

confidence: 99%

The effect of a detonation nanodiamond coating on the thermal decomposition properties of RDX explosives

Tong

Zhang

2014

Phys. Chem. Chem. Phys.

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A well-dispersed and uniformly shaped detonation nanodiamond (DND) was produced and coated over micron scale RDX in various amounts to form four kinds of DND coating composites (NDRs). In order to confirm the optimal coating amount and its effect on the thermal properties, the thermal decomposition and kinetics were studied by DSC, TG and DPTA techniques. The critical temperature of thermal explosion (Tb) and the self accelerating decomposition temperature (T(SADT)) both exhibit an interesting volcano-shaped changing trend and rank in an increasing order of NDR4 < NDR1 < RDX < NDR3 < NDR2. This indicates that the DND coating amount, ranging from 1/7 to 1/5, provides NDRs with better thermal safety than RDX. The thermolytic kinetic parameters (Ea and A) and activation thermodynamic parameters (ΔS(≠), ΔH(≠) and ΔG(≠)) are sorted in the following order: NDR1 < NDR4 < NDR2 < NDR3. The gas emission and reaction rate constant of the initial thermal decomposition have the same order. The results show that the DND coating could improve the reactivity of the NDRs and the effect is proportional to the coating amount. However, excessive coating that is more than 1/3 conversely hinders decomposition and gas diffusion, like a layer of protective shell. The isoconversional activation energy (Ea) varies with the conversion extent (α) at the initial stage of α = 0.1-0.5, which indicates that the thermal decomposition of the NDRs is a multi-step process including the secondary reaction or catalytic reaction. However, the Ea values are almost independent of α when α = 0.6-0.9, with the mean values in an increasing order of NDR1 < NDR4 < NDR2 < NDR3.

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“…The gas emission of DPTA is used to evaluate the thermal stability of a material; a lower gas emission signies better stability. 21,22 DPTA was used to study the initial thermal decomposition of the DMRs, recording the gas pressure of the thermal decomposition in real time, normalized to the standard conditions of a 1.0 g quantity, a 25 mL volume and a 273.15 K temperature, as shown in Fig. 4.…”

Section: Dpta Analysismentioning

confidence: 99%

The effect of detonation polycrystalline diamond modification on the thermal decomposition of RDX

Tong

Zhang

2016

RSC Adv.

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Dynamic pressure thermal analysis of double-base propellants containing RDX

Cited by 6 publications

References 34 publications

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

The effect of a detonation nanodiamond coating on the thermal decomposition properties of RDX explosives

The effect of detonation polycrystalline diamond modification on the thermal decomposition of RDX

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