Results 41 to 50 of about 101 (88)

Synthesis and UV-Curing Modification of the High cis-1,4-Hydroxyl-Terminated Polybutadiene Binder Suitable for Ultra-Low Temperature Applications

Polymers
As space exploration activities and strategic deployments in polar regions continue to advance, higher demands have been placed on the low-temperature resistance of propellant binders. Here, high cis-1,4 content hydroxyl-terminated polybutadiene (HTPB) was successfully synthesized via an oxidative cleavage method using commercial cis-polybutadiene (BR).
Hu Lyu, Lei Wang, Yue Li, Guoliang Yu, Shudi Liu, Dongzhou Sun, Yuling Liang, Pengfei Huo, Dawei Zhang, Zhiqiang Ning, Xianzhi Kong   +10 more
openaire   +1 more source

Manufacturing optimization of HTPB composite propellants: rheological flow and viscoelastic behavior

Polymer Testing
The mixing stage is the most critical phase in the production of high-energy composite rocket propellants, where balancing high solids loading with processability remains a major challenge.
D. Chimeno, R. López, A. Salazar, J. Rodríguez   +3 more
doaj   +1 more source

Three-dimensional microstructural characterization of HMX-based propellant via synchrotron X-ray tomography

Energetic Materials Frontiers
Although octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) plays a critical role in high-performance weapon systems, its microstructural behavior within the grains of solid propellants and PBXs has not been fully explored. This challenge arises from
Jun Wang, Chen-xi Ma, Pei-pei Wang, Jun-feng Wang   +3 more
doaj   +1 more source

Effects of Gamma Irradiation on Solid Propellant Conventional and UV-Cured Binders

Aerospace
Ionizing radiations are responsible for bond scission, radical formation, and oxidative degradation of polymer matrices. This study focuses on the effects of gamma irradiation on solid propellant binders, targeting a comprehensive chemical and mechanical
Stefania Carlotti, Rocco Carcione, Beatrice D’Orsi, Tommaso Lusetti, Alessandro Finazzi, Jessica Scifo, Ilaria Di Sarcina, Matteo Ferrari, Alessia Cemmi, Filippo Maggi   +9 more
doaj   +1 more source

Ceiling Temperature Influence on The Synthesis of MT-4 and Aging Behavior of Polyurethane Polymer

Journal of Engineering Science and Military Technologies
The stability of the bonding agent in the polymeric binder system has a significant impact on the long-term aging performance of composite solid rocket propellants (CSRPs).
Ali abdelall
doaj   +1 more source

Theoretical Investigation of the Bond Dissociation of Hydroxyl Terminated Polybutadiene Binder and Effect on Mechanical Properties [PDF]

Acta Chimica Sinica, 2012
Wen-Ming Wu, Wei Zhang, Min-B Qiang Hong-Fu Chen, Liang-Wei Shi   +3 more
openaire   +1 more source

Mechanical properties of HTPB propellants: Recent advances and underlying mechanisms

Energetic Materials Frontiers
Hydroxyl-terminated polybutadiene (HTPB)-based composite solid propellants (CSPs) are widely used in solid rocket motors due to their excellent mechanical properties and low cost.
Wasiullah Qazi, Rui Pu, Yuan Qin, Qi-Long Yan   +3 more
doaj   +1 more source

Synthesis of propellant grade HHTPB by hydrogenation of HTPB using Pd-activated charcoal as catalyst

FirePhysChem
To derive more performance from the conventional composite propellant based on hydroxyl-terminated polybutadiene (HTPB) and ammonium perchlorate (AP), it is envisaged to hydrogenate HTPB, which increases the H/C (hydrogen to carbon ratio) of the base ...
Ch. Devi Vara Prasad, P. Kanakaraju, R Vinu, Abhijit P Deshpande   +3 more
doaj   +1 more source

The regulation of ferrocene-based catalysts on heat transfer in high-pressure combustion of ammonium perchlorate/hydroxyl-terminated polybutadiene/aluminum composite propellants

Defence Technology
The regulation of the burning rate pressure exponent for the ammonium perchlorate/hydroxyl-terminated polybutadiene/aluminum (AP/HTPB/Al) composite propellants under high pressures is a crucial step for its application in high-pressure solid rocket ...
Jinchao Han, Songqi Hu, Linlin Liu
doaj   +1 more source

Effect of Curing Parameter on the Mechanical Properties and Bond Strength at Propellant-Liner Interfaces in Rocket Motors

Chemical Engineering Transactions
This study investigates the effect of curing parameters (Rt) on the mechanical properties and bond strength of propellants and liners in rocket motors compared to the design values.
Thirapat Kitinirunkul, Paisarn Boonyarat, Khumchoo Wasan, Apinan Namkanisorn   +3 more
doaj