2019年12月1日 · The physiochemical properties of double-base propellants such as energy density, mechanical properties, and combustion characteristics and stability depend on the proportions of NC, nitrate ester, stabilizers, plasticizers, and other catalysts. Two types of double-base propellants, extruded and cast, are distinguished by the manufacturing process.

2025年3月1日 · Previous research primarily focused on the oscillating combustion of AP/HTPB propellants, often utilizing simplified microstructure models such as the sandwich structure. To enhance the representativeness of the research, this study will incorporate a 2D particle packing structure to model the microstructure of solid propellants.

2024年11月15日 · DB propellants are formulated in response to the military's need for extended shooting distances, aiming for higher bullet velocities and increased propellant energy. This propellant type incorporates nitroglycerine (NG) or EGDN as energetic plasticizers to NC [53]. The solventless production technology employed in double-base (DB) propellants ...

2025年1月1日 · The propellants with 40 mass% CL-20 had a burning rate 50 to 90 % larger than that of the initial HTPB/AP/Al formulation and had a very high exponent (n = 0.679). In HTPB/CL-20 propellants, the range of decomposition temperature of CL-20 was widened due to the endothermic crystal transition of an AP particle; the existence of CL-20 accelerated ...

2025年1月5日 · Therefore, the commonly used solid propellants are mostly composite agents of energetic materials, mainly including fuel, oxidant and additives to ensure the conditions of fuel molding [12]. To improve the performance of solid engines, solid propellants are rewired to have a criteria of high-specific impulse and high-density [13]. The addition ...

2024年4月15日 · Consequently, solid propellants have gained prominence in the domain of chemical rockets, space shuttles, and underwater missiles (torpedoes). Furthermore, they find utility in automotive airbag inflators that safeguard passengers during accidents. These propellants may operate autonomously as fuel or serve as igniters for liquid propellants [3 ...

2025年1月15日 · However, the combustion state of propellants, recorded by high-speed camera and thermal infrared imager in Fig. 1 a-d, is an accurate way to study the burning rate. Two combustion characteristics of the propellants are also clearly shown in Fig. 1 a-c. The first characteristic is that combustion occurs at the anode of the ECSPs.

2025年1月20日 · All propellants were provided by Xi'an Modern Chemistry Research Institute, and the main ingredients were nitrocellulose (NC), nitroglycerin (NG), RDX or HMX, and other additives. The RDX/HMX-CMDB propellants were prepared by the conventional solvent-free molding process, which involves absorption-flooding-ripening-calendering-cutting.

2023年9月1日 · Among all six propellants, SP3 containing AP@Al-1 and Al@RDX composites experiences the greatest decrease in storage modulus, whereas SP4, SP5, and SP6 exhibit similar decreases in E′, as shown in Fig. 5 a2. A comparison of the E′ of SP1 and SP2 propellants reveals that SP1 has higher E′ than SP2 at low temperatures. This difference can ...

2024年3月1日 · Nitrocellulose (NC) is an energetic material commonly used as the primary component in the formulation of single base (SB) propellants. 1, 2, 3 Generally, a SB propellant consists of an energetic substance such as NC and at least one type of additives like plasticizer, oxidizer, fuel, cross-linking agents, curing agents, and stabilizer. 4 Additives, typically …