scholarly journals Effect of bonding agent production materials on the mechanical properties of composite solid rocket propellant

2018 ◽  
Vol 189 ◽  
pp. 08001 ◽  
Author(s):  
Ali.M.Abd elall ◽  
Guo Lin
Keyword(s):  
Mechanical Properties ◽  
Solid Particles ◽  
Bonding Agent ◽  
Solid Propellants ◽  
Solid Rocket Propellant ◽  
Bonding Agents ◽  
Composite Solid Propellants ◽  
Good Strain ◽  
Solid Rocket ◽  
Composite Solid

An effective pathway was explored to design and select proper bonding agents that could effectively improve the interfacial interactions between bonding agents and solid particles, modern types of composite solid propellants focused on increasing the mechanical properties in order to withstand stresses produced due to various loading conditions, changes in environmental condition, transportation and handling. In this work, the study show that the effect of solvent in production of bonding agent has a different impact on the mechanical properties as the polar solvent in formulation S3 has a good strain values corresponding to the stress. Also the changing of the percentage of CuCl2 has a significant effect on mechanical properties as giving high value of strain with the percentage of 4.5 % and returns back the value of strain decrease with increase the percentage of CuCl2 to give the lowest values of the strain corresponding to the stress value with percentage 7.5 %.

scholarly journals Synthesis of a Series of Dual-Functional Chelated Titanate Bonding Agents and Their Application Performances in Composite Solid Propellants

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5353
Author(s):  
Guomin Lin ◽  
Yixue Chang ◽  
Yu Chen ◽  
Wei Zhang ◽  
Yanchun Ye ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Rheological Properties ◽  
Photoelectron Spectroscopy ◽  
Solid Propellants ◽  
Bonding Agents ◽  
Dual Functional ◽  
Composite Solid Propellants ◽  
Bond Chain ◽  
Composite Solid

Titanate-based bonding agents are a class of efficient bonding agents for improving the mechanical properties of composite solid propellants, a kind of special composite material. However, high solid contents often deteriorate the rheological properties of propellant slurry, which limits the application of bonding agents. To solve this problem, a series of long-chain alkyl chelated titanate binders, N-n-octyl-N, N-dihydroxyethyl-lactic acid-titanate (DLT-8), N-n-dodecyl-N, N-dihydroxyethyl-lactic acid-titanate (DLT-12), N-n-hexadecyl-N, N-Dihydroxyethyl-lactic acid-titanate (DLT-16), were designed and synthesized in the present work. The infrared absorption spectral changes of solid propellants caused by binder coating and adhesion degrees of the bonding agents on the oxidant surface were determined by micro-infrared microscopy (MIR) and X-ray photoelectron spectroscopy (XPS), respectively, to characterize the interaction properties of the bonding agents with oxidants, ammonium perchlorate (AP) and hexogen (RDX), in solid propellants. The further application tests suggest that the bonding agents can effectively interact with the oxidants and effectively improve the mechanical and rheological properties of the four-component hydroxyl-terminated polybutadiene (HTPB) composite solid propellants containing AP and RDX. The agent with longer bond chain length can improve the rheological properties of the propellant slurry more significantly, and the propellant of the best mechanical properties was obtained with DLT-12, consistent with the conclusion obtained in the interfacial interaction study. Our work has provided a new method for simultaneously improving the processing performance and rheological properties of propellants and offered an important guidance for the bonding agent design.

Determination of Primary Amine Content in Bonding Agent Used in Composite Solid Propellants

2014 ◽  
Vol 39 (4) ◽  
pp. 538-544 ◽  
Author(s):  
José I. S. Oliveira ◽  
Darci C. Pires ◽  
Milton F. Diniz ◽  
Jorge L. Siqueira ◽  
Elizabeth C. Mattos ◽  
...  
Keyword(s):  
Primary Amine ◽  
Bonding Agent ◽  
Solid Propellants ◽  
Amine Content ◽  
Composite Solid Propellants ◽  
Composite Solid

scholarly journals Catalytic Effects of Ruthenocene Bimetallic Compounds Derived from Fused Aromatic Ring Ligands on the Main Oxidizing Agent for Solid Rocket Motor

2022 ◽  
Author(s):  
Yuvaraja Dibdalli ◽  
José Gaete ◽  
Claudio Osorio-Gutierrez ◽  
Juan Luis Arroyo ◽  
Angel Norambuena ◽  
...  
Keyword(s):  
Decomposition Temperature ◽  
Solid Propellants ◽  
Solid Rocket Motor ◽  
Aromatic Rings ◽  
Scanning Calorimetry ◽  
Composite Solid Propellants ◽  
Solid Rocket ◽  
Bimetallic Compounds ◽  
Catalytic Effects ◽  
Composite Solid

We report the catalytic effect of three ruthenocene bimetallic compounds derived from fused aromatic rings of general formula [{Cp*Ru}2L], with Cp*: pentamethylcyclopentadiene and L = pentalene (1), 2,6-diethyl-4,8-dimethyl-s-indacene (2), and 2,7-diethyl-as-indacene (3), on the thermal decomposition of ammonium perchlorate (AP). The new compound 3 was characterized by a combination of multinuclear magnetic resonance (NMR) spectroscopy and elemental analysis. The differential scanning calorimetry (DSC) analysis of compound 3 shows a decrease in the decomposition temperature of AP to 347 ºC, increases the energy release to 2048 J g-1 and, consequently, leads to the lowest activation energy (42.9 kJ mol−1). These results are comparable to the typically used metallocene (catocene: 347 ºC and 2472 J g-1), suggesting a suitable and competitive alternative to be used as a modifier for composite solid propellants.

scholarly journals Noncrystalline Binder Based Composite Propellant

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Mohamed Abdullah ◽  
F. Gholamian ◽  
A. R. Zarei
Keyword(s):  
Mechanical Properties ◽  
Specific Impulse ◽  
Thermal Analyses ◽  
Energetic Material ◽  
Solid Loading ◽  
Attractive Alternative ◽  
Composite Propellant ◽  
Composite Solid Propellants ◽  
Solid Rocket ◽  
Composite Solid

This study reports on propellants based on cross-linked HTPE binder plasticized with butyl nitroxyethylnitramine (BuNENA) as energetic material and HP 4000D as noncrystalline prepolymer. This binder was conducted with solid loading in the 85%. The results showed an improvement in processability, mechanical properties and burning rate. In addition, its propellant delivers (about 6 seconds) higher performance (specific impulse) than the best existing composite solid rocket propellant. Thermal analyses have performed by (DSC, TGA). The thermal curves have showed a low glass transition temperature () of propellant samples, and there was no sign of binder polymer crystallization at low temperatures (−50°C). Due to its high molecular weight and unsymmetrical or random molecule distributions, the polyether (HP 4000D) has been enhanced the mechanical properties of propellants binder polymer over a large range of temperatures [−50, 50°C]. The propellants described in this paper have presented high volumetric specific impulse (>500 s·gr·cc−1). These factors combined make BuNENA based composite propellant a potentially attractive alternative for a number of missions demanding composite solid propellants.

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