Results 131 to 140 of about 967 (177)

HNF/HTPB BASED COMPOSITE PROPELLANTS

International Journal of Energetic Materials and Chemical Propulsion, 2002
In a search for new storable high performance propellants for the European Space Agency (ESA), the solid oxidiser Hydrazinium Nitroformate (HNF) was identified as a very promising ingredient for a new storable composite propellant. Two distinct advantages of HNF based propellants over presently used Ammonium Perchlorate (AP) based propellants rvere the
Heijden, A.E.D.M. van der, Keizers, H.L.J., Veltmans, W.H.M.   +2 more
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Thermal stability and kinetic of decomposition of nitrated HTPB

Journal of Hazardous Materials, 2009
Nitrated HTPB (NHTPB) is a potential energetic binder to replace the conventional inert binder, HTPB, for the composite solid propellants and plastic bonded explosives (PBXs). The thermal stability of the NHTPB sample with 10% double bonds converted to dinitrate ester group (10% NHTPB) was evaluated by high-pressure differential scanning calorimeter ...
Qingfa, Wang, Li, Wang, Xiangwen, Zhang, Zhentao, Mi   +3 more
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Synthesis of 5-(dimethylsilyl)pentylalkylferrocene-grafted HTPB (alkylFc-HTPB) via platinum-catalyzed hydrosilylation

Journal of the Iranian Chemical Society, 2017
In this work, at first alkylferrocene derivatives were synthesized according to procedure described in the literature. (5-Chloropentanoyl)ferrocene derivatives were prepared by Friedel–Crafts acylation of ferrocene and alkylferrocene derivatives with 5-chloropentanoyl chloride in dichloromethane, and AlCl3 was used as catalyst.
Reza Teimuri-mofrad, Kazem D. Safa, Saiedeh Abedinpour, Keshvar Rahimpour   +3 more
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Studying for the State Monitoring Time of HTPB Propellant

2016 9th International Symposium on Computational Intelligence and Design (ISCID), 2016
Using the finite element analysis to draw a certain type of HTPB propellent on duty in the natural storage and carrier state of stress - time curve, using the linear cumulative damage theory, the HTPB propellent of cumulative damage in both conditions are simulated and calculated the two states of cumulative damage factor, discuss the engine timing of ...
Yanhui Tang, Kehai Dong, Hao Wu, Bo Zhang, Liguan Pei   +4 more
openaire   +1 more source

Structure‐property relationship of HTPB‐based propellants. I. Effect of hydroxyl value of HTPB resin

Journal of Applied Polymer Science, 1993
AbstractComposite propellants based on hydroxyl‐terminated polybutadience (HTPB) resin are the most common contemporary solid propellants for launch vehicle and missile applications. A series of HTPB resins, manufactured by free‐radical polymerisation using a peroxide initiator, with varying molecular weights and hydroxyl values, was used in propellant
R. Manjari, V. C. Joseph, L. P. Pandureng, T. Sriram   +3 more
openaire   +1 more source

Solid Propellants based on ADN and HTPB

47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011
The aim of this work was to perform an initial evaluation of ammonium dinitramide, ADN, as substitute for ammonium perchlorate, AP, in solid rocket propellants for large space launch boosters. This paper includes performance evaluation, curing and compatibility assessments, propellant formulation and determination of ballistic properties.
John de Flon, Sten Andreasson, Mattias Liljedahl, Carl Oscarson, Marita Wanhatalo, Niklas Wingborg   +5 more
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ADN Recrystallization and Microencapsulation with HTPB by Simple Coacervation

Propellants, Explosives, Pyrotechnics, 2020
AbstractAmmonium dinitramide (ADN) has been considered the potential substitute for ammonium perchlorate in solid green propellants. However, it has also some drawbacks due to its high hygroscopicity and chemical incompatibility with some of the components present in composite propellant formulations.
Jessica de Oliveira Silva, Kamila Pereira Cardoso, Josiane Ribeiro Campos Silva, Elizabete Yoshie Kawachi, Márcio Yuji Nagamachi, Luiz Fernando de Araujo Ferrão   +5 more
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A numerical model for AP/HTPB premixed combustion

Applied Thermal Engineering
A simulation model is developed for the premixed combustion of Ammonium Perchlorate (AP) and Hydroxyl-terminated Polybutadiene (HTPB) using a detailed chemical mechanism in gas and semiglobal kinetics in condensed phases. The suggested model considers the burning of the premixed propellant in three distinct phases: a solid phase, a condensed phase ...
Neeraj Kumar Pradhan, Arindrajit Chowdhury, Debasis Chakraborty, Neeraj Kumbhakarna   +3 more
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Combustion of AP/HTPB laminate propellants

37th Joint Propulsion Conference and Exhibit, 2001
The combustion of AP/HTPB laminate propellants has been investigated experimentally and theoretically. The experiments used simultaneous UV emission and transmission imaging to obtain information about the flame structure and the burning surface profile.
M. Brewster, G. Knott, B. Chorpening
openaire   +1 more source

A Study of a Novel Additive for HTPB Propellant

1976
Abstract : Experimental studies were conducted to define the utility regimes of graphite linters (chopped graphite fiber ranging from 50 to 200 micrometers) with respect to burn rate augmentation, acoustic stabilization and processing improvement in HTPB composite propellant. Linter utility regimes were defined with respect to burn rate reproducibility
M. W. Beckstead, A. G. Butcher, J. P. Peterson   +2 more
openaire   +1 more source