Effects of Fluoropolymer Binders on the Mechanical Properties of TATB‐Based PBX

Liu, Jiahui; Yang, Zhijian; Liu, Shijun; Jian-hu, Zhang; Liu, Yonggang

doi:10.1002/prep.201700295

Cited by 26 publications

(10 citation statements)

References 33 publications

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“…85–97 wt%) and a polymer as the matrix. For PBXs, it is widely accepted the detonation, safety, mechanical, environmental adaptation and storage performances are the most important characteristics as concerned for their application . Among them, the mechanical performance, including the mechanical strength, modulus and creep resistance, has attracted great attentions because it plays a key role to maintain the structural strength of explosive charges, facilitating the safety, reliability and long storage performances .…”

Section: Introductionmentioning

confidence: 99%

Effects of Crystal Quality and Morphology on the Mechanical Performance of LLM‐105 Based PBXs

Yang

Lin

Gong

et al. 2019

Propellants Explo Pyrotec

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Mechanical performance is significant for the application of pressed polymer bonded explosives (PBXs) materials. In this research, several types of 2,6‐diamino‐3,5‐dinitropyrazine‐1‐oxide (LLM‐105) were selected to study the effects of crystal quality and morphology on the mechanical performance of LLM‐105 based PBXs. The surface bonding status of the LLM‐105 crystal and molding powder was characterized by scanning electron microscopy (SEM) and contact angle analysis, and the moldability was evaluated by determining the relative density of pressed cylinders of corresponding PBXs. Besides, static and dynamic mechanical properties were studied and compared, presenting the compressive, tensile and creep curves. For LLM‐105 based PBXs, spherical morphology and rough surface could result improved mechanical strength and creep resistance, facilitating the structural and dimensional stability of charges. In this case, it can bring benefits for their reliability and safety performances during application.

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Section: Introductionmentioning

confidence: 99%

Effects of Crystal Quality and Morphology on the Mechanical Performance of LLM‐105 Based PBXs

Yang

Lin

Gong

et al. 2019

Propellants Explo Pyrotec

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“…Polydopamine (PDA) coating has attracted much attention in the past decade due to the strong adhesive attachment of PDA to various surfaces under ambient conditions [ 20 , 39 , 56 ]. Gong, He and Lin conducted a series of studies [ 34 , 35 , 52 , 54 , 57 ] on in situ polymerization of dopamine for typical explosive crystals including cyclotetramethylenetetranitramine (HMX), TATB and CL-20. The schematic for the preparation of core–shell structured TATB composites and the supposed interactions between TATB, PDA and fluoropolymer are illustrated in Figure 2 b.…”

Section: Preparation Methods For Csesmentioning

confidence: 99%

“…TATB is a moderately powerful, thermally stable and insensitive explosive [ 15 , 107 , 108 , 109 ]. TATB crystals consist of graphite-like sheets with considerable intermolecular interactions between layers [ 34 , 58 ]. However, TATB crystals suffer from large deformation when exposed to the thermal physical environment due to their unique structure, which restricts long-term storage and transport.…”

Section: Compositions and Characteristics Of Csesmentioning

confidence: 99%

The Art of Framework Construction: Core–Shell Structured Micro-Energetic Materials

Duan¹,

Li²,

Hu³

et al. 2021

Molecules

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Weak interfacial interactions remain a bottleneck for composite materials due to their weakened performance and restricted applications. The development of core–shell engineering shed light on the preparation of compact and intact composites with improved interfacial interactions. This review addresses how core–shell engineering has been applied to energetic materials, with emphasis upon how micro-energetic materials, the most widely used particles in the military field, can be generated in a rational way. The preparation methods of core–shell structured explosives (CSEs) developed in the past few decades are summarized herein. Case studies on polymer-, explosive- and novel materials-based CSEs are presented in terms of their compositions and physical properties (e.g., thermal stability, mechanical properties and sensitivity). The mechanisms behind the dramatic and divergent properties of CSEs are also clarified. A glimpse of the future in this area is given to show the potential for CSEs and some suggestions regarding the future research directions are proposed.

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“…Due to a balance of chemical and mechanical properties with processability when mixed with explosives, fluoropolymers emerged as commonly used binder [ 28 ]. To estimate the effect of the polymer binders on the co-crystal-based PBXs, we select fluoropolymer F 2311 as the polymeric binder in CL-20/TNT based PBXs, which is a random copolymer made up of vinylidenedifluoride (VDF) and chlorotrifluoroethylene (CTFE) with the molar ratio of 1:1, showed in Figure 1 a.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations for Effects of Fluoropolymer Binder Content in CL-20/TNT Based Polymer-Bonded Explosives

Xiao

2021

Molecules

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In order to better understand the role of binder content, molecular dynamics (MD) simulations were performed to study the interfacial interactions, sensitivity and mechanical properties of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane/2,4,6-trinitrotoluene (CL-20/TNT) based polymer-bonded explosives (PBXs) with fluorine rubber F2311. The binding energy between CL-20/TNT co-crystal (1 0 0) surface and F2311, pair correlation function, the maximum bond length of the N–NO2 trigger bond, and the mechanical properties of the PBXs were reported. From the calculated binding energy, it was found that binding energy increases with increasing F2311 content. Additionally, according to the results of pair correlation function, it turns out that H–O hydrogen bonds and H–F hydrogen bonds exist between F2311 molecules and the molecules in CL-20/TNT. The length of trigger bond in CL-20/TNT were adopted as theoretical criterion of sensitivity. The maximum bond length of the N–NO2 trigger bond decreased very significantly when the F2311 content increased from 0 to 9.2%. This indicated increasing F2311 content can reduce sensitivity and improve thermal stability. However, the maximum bond length of the N–NO2 trigger bond remained essentially unchanged when the F2311 content was further increased. Additionally, the calculated mechanical data indicated that with the increase in F2311 content, the rigidity of CL-20/TNT based PBXs was decrease, the toughness was improved.

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Effects of Fluoropolymer Binders on the Mechanical Properties of TATB‐Based PBX

Cited by 26 publications

References 33 publications

Effects of Crystal Quality and Morphology on the Mechanical Performance of LLM‐105 Based PBXs

Effects of Crystal Quality and Morphology on the Mechanical Performance of LLM‐105 Based PBXs

The Art of Framework Construction: Core–Shell Structured Micro-Energetic Materials

Molecular Dynamics Simulations for Effects of Fluoropolymer Binder Content in CL-20/TNT Based Polymer-Bonded Explosives

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