Results 21 to 30 of about 1,905,870 (344)

Polyurethanes Based on Environmentally Friendly Polyols as a Promising Alternative to HTPB Binder for Composite Propellant Rockets

open access: yesProceedings, 2023
Composite propellants used in solid-fuel rockets commonly consists of an oxidizer, the most used being ammonium perchlorate, fuels such as powdered aluminum, compounds that control the burn rate (catalysts or inhibitors), and various other additives [...]
Sorin-Viorel Dolana   +8 more
doaj   +1 more source

Noncrystalline Binder Based Composite Propellant [PDF]

open access: yesISRN Aerospace Engineering, 2013
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.
Mohamed Abdullah   +2 more
openaire   +1 more source

Combustion and Propulsion Research [PDF]

open access: yes, 1963
Combustion chemistry is one of the oldest branches of chemical science. Among its pioneers must be counted Lavoisier, Bunsen, and others whose names belong among those of the founders of chemical science.
Penner, S. S.
core   +1 more source

Ferrocene-fullerene dyad as a novel burn rate modifier for propellants

open access: yesEnergetic Materials Frontiers
The burn rate of composite rocket propellants serves as a critical ballistic parameter in the construction of a rocket engine. Due to their large surface areas, carbon-based materials such as carbon nanotubes, graphene, and fullerene have demonstrated ...
Shrutika Sriramrao   +3 more
doaj   +1 more source

Cu–Co–O nano-catalysts as a burn rate modifier for composite solid propellants

open access: yesDefence Technology, 2016
Nano-catalysts containing copper–cobalt oxides (Cu–Co–O) have been synthesized by the citric acid (CA) complexing method. Copper (II) nitrate and Cobalt (II) nitrate were employed in different molar ratios as the starting reactants to prepare three types
D. Chaitanya Kumar Rao   +2 more
doaj   +1 more source

Research progress in data-driven constitutive modeling of composite solid propellants

open access: yesAIP Advances
With the continuous advancement of technology, composite solid propellants play an increasingly widespread and crucial role in fields such as aerospace and military applications.
Bin Yuan, Hongfu Qiang, Chunguo Yue
doaj   +1 more source

Numerical Analysis of Solid Rocket Motor Instabilities With AP Composite Propellants [PDF]

open access: yes, 1999
A non-steady model for the combustion of ammonium perchlorate composite propellants has been developed in order to be incorporated into a comprehensive gasdynamics model of solid rocket motor flow fields.
Beddini, Robert A.   +3 more
core  

On the combustion of heterogeneous AP/HTPB composite propellants: A review

open access: yesFuel, 2019
The combustion of ammonium perchlorate (AP) in a polymer binder matrix of hydroxyl-terminated-polybutadiene (HTPB) is reviewed, covering the experimental and modeling approaches explored for over a half-century.
Claresta N. Dennis, Brian T. Bojko
semanticscholar   +1 more source

PARP inhibition and pharmacological ascorbate demonstrate synergy in castration‐resistant prostate cancer

open access: yesMolecular Oncology, EarlyView.
Pharmacologic ascorbate (vitamin C) increases ROS, disrupts cellular metabolism, and induces DNA damage in CRPC cells. These effects sensitize tumors to PARP inhibition, producing synergistic growth suppression with olaparib in vitro and significantly delayed tumor progression in vivo. Pyruvate rescue confirms ROS‐dependent activity.
Nicolas Gordon   +13 more
wiley   +1 more source

Properties of high-energy propellants based on oxygen-enriched thermoplastic elastomer binders

open access: yesFirePhysChem
Composite propellants are widely used in applications ranging from gas generators and small rockets to large rocket systems in space programs. This study presents a novel thermoplastic elastomer (TPE) binder system based on oxygen-enriched polyether ...
Vladica S Bozic
doaj   +1 more source

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