Review
Chemistry, Multidisciplinary
Weiqiang Pang, Yang Li, Luigi T. DeLuca, Daolun Liang, Zhao Qin, Xiaogang Liu, Huixiang Xu, Xuezhong Fan
Summary: This study analyzed the effects of nano-sized metal particles on the properties of solid rocket propellants, finding that these additives can increase burning rate while also promoting higher impact sensitivity and friction sensitivity compared to micro-sized particles.
Article
Chemistry, Applied
Sarah A. Bentil, William J. Jackson, Christopher Williams, Timothy C. Miller
Summary: Inert solid rocket propellant samples were experimentally tested for their viscoelastic response at high strain rates using dynamic inflation experiments. Digital image correlation and inverse finite element analysis were employed to characterize and calibrate the propellant's behavior, providing insight into the material's response to shock wave exposure.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2022)
Article
Polymer Science
Kuiyao Zhang, Kangjie Shuai, Zhongbin Ni, Tatsuo Kaneko, Weifu Dong, Mingqing Chen, Dongjian Shi
Summary: Non-isocyanate polyurethanes (NIPUs) with high overall performance and self-healing properties were synthesized through a solvent-free and ecologically friendly melt polycondensation route. NIPUs exhibited linear structures, high molecular weights, good thermal and mechanical properties, and the ability for self-healing and recyclability, showing great potential for industrialization.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Traian Rotariu, Bogdan-Gheorghe Pulpea, Florin-Marian Dirloman, Aurel Diacon, Edina Rusen, Gabriela Toader, Neculai-Daniel Zvincu, Tanta-Verona Iordache, Rizvan Horia Botis
Summary: This study developed a high-performance and eco-friendly rocket propellant by synthesizing and combining novel compositions, addressing the polymorphism concerns of ammonium nitrate. Recycled PET glycolysis was utilized to produce polyester-polyol blends as binders, allowing for adjustment of the energetic output and mechanical properties of the propellant. The performance and safety characteristics of these new composites were evaluated through various analytical techniques and tests.
Article
Chemistry, Applied
Hao Wang, Ziqiao Wang, Naihang Kuang, Lei Xu, Chao Liu, Chunhua Zhang
Summary: In this study, a new type of thermosetting polyimide with sulphur-containing linkage was developed, showing a unique thermoplastic-like glass transition behavior. The film material exhibited high tensile strength and modulus and maintained good mechanical properties even after high temperature and long-term aging. Furthermore, the polyimide showed potential value in the fabrication of carbon fiber reinforced composite and antibacterial materials.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Polymer Science
Islam K. Boshra, Guo Lin, Ahmed Elbeih
Summary: The study investigated the effects of CM based on TMP and BD on the mechanical properties of CSRPs, demonstrating that the addition of CM can significantly enhance the propellant's mechanical properties. Samples with a TMP:BD ratio of 2:1 exhibited the highest strength, while those with a ratio of 1:2 showed the highest strain across all NCO/OH ratios.
HIGH PERFORMANCE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Chuan Li, Zhengjun Liu, Ke Xue, Yingda Huo, Fubao Li, Xiaoping Zhu
Summary: In this paper, the effect of different catalysts on the curing reaction of a blended resin system of bisphenol A dipropargyl ether and cyanate ester was studied. The thermal stability and mechanical properties of the catalytically cured blended resin system were also investigated. It was found that acetylacetone salts of transition metals and dibutyl ditin laurate reduced the curing temperature, with copper acetylacetonate significantly lowering the temperature below 473 K. The blended resins of bisphenol A-type di cyanate ester and bisphenol E-type di cyanate ester showed better overall performance among the cured compounds. The blended resin has potential applications in liquid oxygen storage tanks of rockets.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Applied
Yalun Wang, Hui Rong, Xiuhui Zhang, Yu Chen, Wen Luo, Yunfei Liu, Weishang Yao, Ye Tian
Summary: This study investigated the influences of desensitized energetic plasticizer on the properties of the binder, determining the mechanisms at the chemical bond and polymer chain levels through Gaussian quantum chemical calculation and MD simulation. The consistent results at both micro and macro levels offer important theoretical guidance for studying the structure-mechanism-performance relationship of propellant binder.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
Article
Construction & Building Technology
Thomas E. Allard, Ashley S. Carey, Isaac L. Howard, Jay Shannon
Summary: This study investigates the effects of early-age temperature histories on the mechanical properties of UHPC through the use of variable temperature curing. The results show that timing of curing significantly impacts the mechanical properties, with specimens cured at room temperature prior to variable temperature curing displaying higher compressive strength and elastic modulus.
ACI MATERIALS JOURNAL
(2022)
Article
Chemistry, Applied
Michal Chmielarek, Beata Sztejter, Piotr Kasprzak, Piotr Prasula
Summary: This paper presents the preparation and properties of solid heterogeneous rocket propellants (SHRPs) with the addition of azide-HTPB. The results show that azide-HTPB improves the performance of the propellants, increasing their calorific value and burning rate.
CENTRAL EUROPEAN JOURNAL OF ENERGETIC MATERIALS
(2022)
Article
Engineering, Aerospace
Seonghyeon Park, Kyounghwan Lee, Hongjae Kang, Youngchul Park, Jongkwang Lee
Summary: In this study, a concept of novel hypergolic pairs with enhanced ignition performance is proposed. The introduction of oxidizing additives, such as LiNO3 and NH4NO3, in ionic liquid fuels and hydrogen peroxide was found to significantly enhance the ignition performance. Nitrate salts, serving as the oxidizing additives, have the potential to improve the properties of oxidizers by lowering the freezing point and shortening the ignition delay time of the hypergolic pairs.
Article
Construction & Building Technology
Peiliang Shen, Jian-Xin Lu, Linnu Lu, Yongjia He, Fazhou Wang, Shuguang Hu
Summary: The utilization of LWFA in UHPC can significantly enhance the properties of concrete, improving compressive strength and durability. The internal curing effect helps to mitigate concrete shrinkage, promote the hydration of cement and pozzolanic reaction, thus improving the microstructure and mechanical properties of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Hani Alanazi, Oussama Elalaoui, Musa Adamu, Saleh O. Alaswad, Yasser E. Ibrahim, Aref A. Abadel, Abdulrahman Fahad Al Fuhaid
Summary: This paper investigated the influence of lightweight aggregate on the strength properties and microstructure of ultra-high-performance concrete (UHPC) to enhance its resistance to elevated temperatures. The results showed that the compressive strength of UHPC specimens improved when exposed to elevated temperatures with the presence of lightweight aggregate, while the flexural strength decreased. The inclusion of lightweight aggregate also improved the microstructure and compressive strength of UHPC.
Article
Chemistry, Physical
Dong Lu, Jing Zhong, Baobao Yan, Jing Gong, Ziye He, Guanhua Zhang, Chengzhe Song
Summary: The study found that a 15% dosage of ITP is optimal for its application in concrete, with steam curing regime enhancing early-age strength and stimulating the activity of ITP to refine the microstructure of the concrete.
Article
Construction & Building Technology
Zongyun Mo, Youmin Han, Li Jiang, Jiawei Wang, Xiaojian Gao
Summary: This study investigated the hydration, microstructure, and strength development of UHPC blended with low-energy mineral admixture and cement supplementary material. The results showed that when steam cured at certain temperatures, UHPC had significantly higher compressive strength but lower flexural strength compared to standard cured mixture. The steam curing temperature played a key role in promoting the mineral admixture reaction, while not affecting cement hydration. The use of steam curing regimes resulted in satisfactory mechanical strengths and microstructures for UHPC.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Chemistry, Applied
Thomas Heintz, Heike Pontius, Jasinin Aniol, Christoph Birke, Karlfred Leisinger, Werner Reinhard
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2009)
Article
Chemistry, Applied
Thomas Heintz, Michael J. Herrmann
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2019)
Article
Chemistry, Applied
Dirk Herrmannsdoerfer, Peter Gerber, Thomas Heintz, Michael J. Herrmann, Thomas M. Klapoetke
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2019)
Proceedings Paper
Optics
Michael Wittek, Dirk Roeseling, Frank Schnuerer, Thomas Heintz, Alexander Dresel, Thomas Wegener, Martin Schmaeh
COUNTERTERRORISM, CRIME FIGHTING, FORENSICS, AND SURVEILLANCE TECHNOLOGIES II
(2018)
Article
Chemistry, Applied
U Teipel, T Heintz
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2005)
Article
Chemistry, Applied
U Teipel, T Heintz, HH Krause
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2000)