Preparation and Properties of Solid Propellant Adhesive System Based on Ethylene Vinyl Acetate/Wax Thermoplastic Elastomer DOI Open Access

Sankgi Hong,

Kuo‐Hui Wu,

Tsao‐Fa Yeh

et al.

Propellants Explosives Pyrotechnics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

ABSTRACT In this study, an ethylene vinyl acetate (EVA)/wax‐based thermoplastic propellant was prepared using a planetary mixer. High‐viscosity EVA used as the elastomer, and either solid wax based on oligomers or alternative liquid tributyl 2‐acetylcitrate (TBAC) were plasticizers to adjust its viscosity. This enhances flow characteristics reduces torque during mixing process. Results: The addition of 30 wt.% significantly reduced viscosity from 218.8 12.67 Pa s, whereas TBAC did not lead significant reduction in EVA. Designed with different ratios EVA/wax binder superior stress–strain relationship over polyurethane (PU). EVA/wax‐based has stable combustion at chamber pressures. St. Robert's Law provides equation for rate combustion, performance parameters derived internal ballistics simulation analysis are very valuable.

Language: Английский

Progress in synthesis and properties of oxetane–based energetic polymers DOI
Yujia Wen,

Hongchang Mo,

Bojun Tan

et al.

European Polymer Journal, Journal Year: 2023, Volume and Issue: 194, P. 112161 - 112161

Published: May 20, 2023

Language: Английский

Citations

14
The thermal decomposition mechanism of RDX/AP composites: ab initio neural network MD simulations DOI
Kehui Pang, Mingjie Wen, Xiaoya Chang

et al.

Physical Chemistry Chemical Physics, Journal Year: 2024, Volume and Issue: 26(15), P. 11545 - 11557

Published: Jan. 1, 2024

A neural network potential (NNP) is developed to investigate the decomposition mechanism of RDX, AP, and their composites.

Language: Английский

Citations

6
Preparation of ADN-based energetic composite microspheres with excellent anti-moisture absorption and safety DOI

Shimin Zhang,

Jingyu Wang,

Chenhe Feng

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 153174 - 153174

Published: June 15, 2024

Language: Английский

Citations

6
Ballistic and thermal characterisation of greener composite solid propellants based on phase stabilized ammonium nitrate DOI Creative Commons
Florin-Marian Dîrloman, Adrian-Nicolae Rotariu, Traian Rotariu

et al.

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 54, P. 103987 - 103987

Published: Jan. 13, 2024

Several representatives of a new class "greener" propellants, comprising polyurethanes (based on recycled PET) as the binder, phase stabilized ammonium nitrate (PSAN) eco-friendly oxidizer, and triethylene glycol dinitrate (TEGDN) energetic plasticizer, together with aluminium-magnesium alloy fuel iron oxide powder (α-Fe2O3) catalyst, were prepared investigated through specific analytical tools. Besides morphological compositional investigations, thermal behaviour ballistic properties propellants determined, compared to those consecrated compositions, based perchlorate. The calorimetric tests used measure heat combustion volume. Impact friction sensitivities also measured. carried out in closed bomb original data processing approach allowed, addition propellant force covolume, identification critical parameter such power index from Vieille's law burning rate.

Language: Английский

Citations

5
A Review of Recent Developments in Hybrid Rocket Propulsion and Its Applications DOI Creative Commons

Shih-Sin Wei,

Meng‐Che Li,

Alfred Lai

et al.

Aerospace, Journal Year: 2024, Volume and Issue: 11(9), P. 739 - 739

Published: Sept. 9, 2024

This paper extensively reviews hybrid rocket propulsion-related activities from combustion engine designs to launch tests. Starting with a brief review of propulsion development history, comparison among the three bi-propellant approaches, and design guidelines, very thorough related its applications is presented in this paper. In addition propellant choice, also affects performance and, therefore, variety designs, considering, e.g., fuel geometry, swirl injection, ignition some innovative flow-channel are explored. Furthermore, many fundamental studies on increasing performances, such as regression rate enhancement, mixing optimization, reviewed. Many problems that will be encountered for practical reviewed discussed, including O/F ratio shift, low-frequency instability, scale-up methods. For future, advanced capabilities lightweight engine, throttling capability, thrust vectoring control concept, insulation materials, 3D-printing manufacturing technologies, flight demonstrations, included. Finally, active research teams their plans briefly introduced.

Language: Английский

Citations

5
Anti‐hygroscopicity technologies for ammonium dinitramide: A review** DOI Creative Commons
Shichao Tian, Yinglei Wang, Xinjian Chen

et al.

Propellants Explosives Pyrotechnics, Journal Year: 2023, Volume and Issue: 48(5)

Published: Feb. 27, 2023

Abstract Valuable propellants have the characteristics of high impulse, low pollution, and strong stability, oxidizers play a substantial role in determining performance propellants. Ammonium dinitramide (ADN) is relatively promising oxidizer due to its high‐energy chlorine‐free characteristics. However, although ADN exhibits energy compared with traditional oxidizers, hygroscopicity when exposed humidity restricts broader application solid This review highlights necessity utilizing anti‐hygroscopicity strategies extend application. The mechanism summarized by calculations experimental results. Anti‐hygroscopicity technologies that can be used include prilling, surface coating, co‐crystallization, these are comprehensively herein. intended provide insight into use ADN, highlight challenges methods, point out future development directions.

Language: Английский

Citations

13
A review on material characterization of composite solid propellant DOI

Rajeev Ranjan,

H. Murthy

Journal of Energetic Materials, Journal Year: 2023, Volume and Issue: unknown, P. 1 - 35

Published: Nov. 29, 2023

Composite solid propellants (CSPs) are extensively used in rocket motors (SRMs) due to their excellent mechanical properties, stability, and high energy density. Lack of structural integrity a propellant grain is identified as major cause motor failure. Thermal loads act on the grains SRMs throughout handling, shipping, storage, operation (ignition, pressurization, acceleration, etc.). Studying behavior under these loading conditions essential, it could lead loss integrity, resulting irregularities burning characteristics. Experimental techniques that simulate different characterize response CSPs. This article provides comprehensive review various material testing for studying Different characterization techniques: relaxation test, uniaxial tensile compressive biaxial test cyclic have been discussed detail this article. Further, research gaps CSPs identified, future suggestions provided.

Language: Английский

Citations

11
Elaboration, Characterization and Thermal Decomposition Kinetics of New Nanoenergetic Composite Based on Hydrazine 3-Nitro-1,2,4-triazol-5-one and Nanostructured Cellulose Nitrate DOI Creative Commons
Ahmed Fouzi Tarchoun, Djalal Trache, Amir Abdelaziz

et al.

Molecules, Journal Year: 2022, Volume and Issue: 27(20), P. 6945 - 6945

Published: Oct. 17, 2022

This research aims to develop new high-energy dense ordinary- and nano-energetic composites based on hydrazine 3-nitro-1,2,4-triazol-5-one (HNTO) nitrated cellulose nanostructured nitrocellulose (NC NMCC). The elaborated energetic formulations (HNTO/NC HNTO/NMCC) were fully characterized in terms of their chemical compatibility, morphology, thermal stability, performance. experimental findings implied that the designed HNTO/NC HNTO/NMCC have good compatibilities with attractive characteristics such as density greater than 1.780 g/cm3 impact sensitivity around 6 J. Furthermore, theoretical performance calculations (EXPLO5 V6.04) displayed optimal composition as-prepared yielded excellent specific impulses detonation velocities, which increased from 205.7 s 7908 m/s for 209.6 8064 HNTO/NMCC. Moreover, deep insight multi-step kinetic behaviors was provided measured DSC data combined isoconversional methods. It is revealed both undergo three consecutive exothermic events satisfactory activation energies range 139-166 kJ/mol 119-134 Overall, this developed nanoenergetic composite nanostructure could serve a promising candidate practical applications solid rocket propellants explosives.

Language: Английский

Citations

18
Research progress of nitrate ester binders DOI Creative Commons
Jinkang Dou, Minghui Xu,

Bojun Tan

et al.

FirePhysChem, Journal Year: 2022, Volume and Issue: 3(1), P. 54 - 77

Published: Sept. 15, 2022

Nitrate ester binders are a unique class of energetic containing nitrate (-ONO2) pendant groups attached to the polymeric backbones, which have been extensively employed in solid propellant formulations improve overall energy output and oxygen balance. Both polymerization monomers chemical modification inert polymers commonly used methods for constructing such binders. Poly(glycidyl nitrate) [PGN] poly(3-nitratomethyl-3-methyloxetane) [PNIMMO] well-investigated pre-polyethers formed by cationic ring-opening (CROP) from monomers, their synthesis, properties, applications propellants discussed detail. It is worth noting that PGN PNIMMO as soft blocks can further generate thermoplastic elastomers (TPEs) polyurethane addition polymerization, emerged potential binder candidates melt-cast explosives. Therefore, recent advances PGN-based TPEs PNIMMO-based subsequently presented. Finally, properties several ester-modified cellulose-based nitrates, nitrated hydroxyl‑terminated polybutadiene (NHTPB) polyvinyl (PVN), obtained direct/indirect nitration polymers, briefly described.

Language: Английский

Citations

17
Current Self-Healing Binders for Energetic Composite Material Applications DOI Creative Commons
Jing Yang, Zhehong Lu, Xin Zhou

et al.

Molecules, Journal Year: 2023, Volume and Issue: 28(1), P. 428 - 428

Published: Jan. 3, 2023

Energetic composite materials (ECMs) are the basic of polymer binder explosives and solid propellants, which mainly composed explosive crystals binders. During manufacturing, storage use ECMs, bonding surface is prone to micro/fine cracks or defects caused by external stimuli such as temperature, humidity impact, affecting safety service ECMs. Therefore, substantial efforts have been devoted designing suitable self-healing binders aimed at repairing cracks/defects. This review describes research progress on for The structural designs these strategies manipulate macro-molecular and/or supramolecular polymers discussed in detail, then implementation ECMs discussed. However, reasonable configuration robust microstructures effective dynamic exchange still challenges. prospects development proposed. These critical insights emphasized guide developing novel future.

Language: Английский

Citations

10