Article
Materials Science, Multidisciplinary
Mohammed Jouini, Amir Abdelaziz, Djalal Trache, Ahmed Fouzi Tarchoun, Souhil Amokrane, Abdelali Benzetta
Summary: This study explores the characteristics of hydroxyl-terminated polybutadiene (HTPB) supplemented with cellulose nitrate (NC) as a high-energy density binder. The NC doping and its content have significant effects on the chemical structure, morphology, energetic, and thermokinetic behavior of HTPB-NC binder, resulting in improved compatibility, density, homogeneity, and fiber dispersion. Furthermore, HTPB-NC exhibits excellent thermal stability, energy release, and chemical reactivity, showcasing its potential for application in the next generation of energetic propellant formulations.
Article
Engineering, Multidisciplinary
Zhe-jun Wang, Hong-fu Qiang
Summary: This study investigates the effects of confining pressure and aging on the mechanical properties of a cement-based solid propellant. Tensile tests were conducted on thermal accelerated aged samples under different confining pressure conditions. The results show that both confining pressure and aging have significant effects on the propellant's mechanical properties, and the coupled effects are complex. The stress and strain responses have different behaviors under different test conditions.
DEFENCE TECHNOLOGY
(2022)
Article
Spectroscopy
Weibin Wang, Liang Xie, Zhaoxuan Wang, Guodong Deng
Summary: This study investigated the feasibility of tracking the blend homogeneity of hydroxyl-terminated polybutadiene (HTPB) adhesive system in the mixing process using near-infrared spectroscopy and orthogonal partial least squares discrimination analysis (OPLS-DA). The developed models showed excellent predictability and were validated using Euclidean distance and move block standard deviation methods. The proposed method proved to be a potential tool to monitor the variation of the uniform state of HTPB propellant slurry in the mixing process.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Applied
Emre Erten, Taner Atalar, Cevdet Kaynak
Summary: The study evaluated the mechanical properties of different liner formulations at different temperatures and found that filled liners exhibited improved mechanical and thermal properties, with carbon black fillers having the most significant effect on enhancement.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2023)
Article
Materials Science, Composites
Zhengzhong Zhang, Xiaolong Fu, Hongjian Yu, Wenjie Tao, Changjie Mao, Jingshuai Chen, Mingyuan Wu, Pengpeng Chen
Summary: The addition of Graphene-Silver (GNs-Ag) hybrids as fillers significantly increased the thermal conductivity of HTPB, improving the mechanical properties and thermal stability of the composites.
COMPOSITES COMMUNICATIONS
(2021)
Article
Engineering, Multidisciplinary
Hao Li, Jie Wei, Ya-nan Zhang, Yu-bing Hu, Wei Jiang, Teng-yue Zhang
Summary: This study focuses on the preparation, characterization, and anti-migration behavior of graphene oxide/hydroxyl-terminated polybutadiene/toluene diisocyanate (GO/HTPB/TDI) nano-composite liner. The addition of 0.3 wt% graphene oxide significantly improves the anti-migration performance of the liner and increases the bond strength, meeting the application requirements of the current propellant system.
DEFENCE TECHNOLOGY
(2023)
Article
Polymer Science
Yongchao Ji, Liang Cao, Zhuo Li, Guoqing Chen, Peng Cao, Tong Liu
Summary: As a typical viscoelastic material, solid propellants have different mechanical properties under static and dynamic loading. A method for the inter-conversion of the dynamic storage modulus and relaxation modulus is established, and its consistency is verified. The results demonstrate the applicability of this method to other types of propellants and the significance it holds in the research of mechanical properties of the propellant.
Article
Crystallography
Zheng Liu, Jianxin Nie, Wenqi Fan, Jun Tao, Fan Jiang, Tiejian Guo, Kun Gao
Summary: To study the safety of a high-energy four-component HTPB propellant solid engine against fragment impact in complex battlefield environments, a simulation study was conducted. The study calibrated the equation of state and reaction rate parameters of the detonation product of the propellant using tests and genetic algorithm. A finite element model of the engine was built using LS-DYNA software to simulate its mechanical response under different conditions. The findings showed that the critical detonation velocity decreases with the increase of fragment number, with this factor becoming less significant when the number of fragments exceeds 5. The study also found that higher metal shell strength and thicker shell wall make it more difficult for the propellant to be detonated by shock. This research can provide valuable insights for the design and optimization analysis of solid rocket engine fragment impact safety.
Article
Engineering, Mechanical
Kaixuan Chen, Xiaochun Xue, Yonggang Yu, Zhenwei Ye
Summary: In this study, a 3D random particle packing model was generated using the Monte Carlo method, and the Miller packing was transformed into a sandwich model using the dual slicing technique. Gas-solid coupling model and two-step BDP flame model were established to investigate the influence of kinetic chemical and fluid diffusion processes on microflame properties. Mathematical relationships between burning rate r(b) and final flame height H3 and HTPB thickness D were obtained by analyzing and fitting combustion processes of multiple AP/HTPB propellants.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Bikash Kumar Sikder, Mutyala Naidu Ganivada, Tushar Jana
Summary: This study describes a cost-effective method for synthesizing thiol, silyl, and halogen derivatives of alkyl-ferrocene, which are then covalently grafted onto the HTPB backbone to prepare polymeric binders with enhanced burn rate characteristics for aerospace applications.
Article
Thermodynamics
Jie Liu, Haomiao Yu, Deqi Wang, Sensen Sun, Fengsheng Li
Summary: To improve the properties of composite solid propellants, a core-shell structure of CuO@AP was prepared and applied in AP/HTPB composite propellants. The CuO@AP propellant demonstrated lower activation energy (E-a) and higher rate constant compared to the CuO/AP propellant. The impact sensitivity of CuO@AP propellant was also lower and had a higher ε(b) value than that of CuO/AP propellant. These findings suggest that CuO@AP composite particles have potential applications in AP/HTPB propellants.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Engineering, Chemical
Pingan Zhang, Wenjiayi Tan, Xilong Zhang, Juan Chen, Jianmin Yuan, Jianru Deng
Summary: This article investigates the transformation of HTPB into AEHTPB through appropriate synthesis strategies, demonstrating that the addition of AEHTPB can enhance the performance of polyurethane elastomers and inhibit the low-temperature decomposition of AP. The use of AEHTPB/HTPB mixture as a binder improves the properties of the propellant.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Multidisciplinary Sciences
Qizhou Wang, Guang Wang, Zhejun Wang, Hongfu Qiang, Xueren Wang, Shiqi Li, Zhaojun Zhu
Summary: This paper addresses the shortcomings of current research on the mechanical properties of solid propellants under complex stress conditions by designing an effective test method and simulating the damage evolution process of the propellant. The results show that the propellant exhibits lower mechanical properties and the fracture process can be divided into multiple stages.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Applied
S. Selvakumar, G. Sreenivasa Rao, K. Audisesha Reddy
Summary: This study focused on the diffusion characteristics of solid propellants based on HTPB resin, showing migration of chemicals in HTPB-XT propellants and resulting in changes in chemical species concentrations in the propellant.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
Article
Chemistry, Applied
Makoto Kohga, Ryoto Togashi
Summary: In this study, a plasticizer, Glycerol propoxylate (GPO) was added to the binder Hydroxyl-terminated polybutadiene (HTPB) to improve its elasticity and burning characteristics. The addition of GPO was effective in extending the pot life and enhancing the mechanical properties of the propellant. However, GPO did not increase the burning rate of the propellant.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
