Results 161 to 170 of about 1,282 (194)
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Terminal functionalized hydroxyl‐terminated polybutadiene: An energetic binder for propellant
Journal of Applied Polymer Science, 2009AbstractWe report the functionalization of hydroxyl terminated polybutadiene (HTPB) backbone by covalently attaching 1‐chloro‐2, 4‐dinitrobenzene (DNCB) at the terminal carbon atoms of the HTPB. The modification of the HTPB by the DNCB does not alter the unique physico–chemical properties and the microstructure of the parent HTPB.
Rajavelu Murali Shankar +2 more
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Thermochimica Acta, 2018
Abstract The isothermal curing kinetics of hydroxyl-terminated polybutadiene (HTPB) binder system containing dioctyl sebacate (DOS) and polyaryl polyisocyanate (PAPI) was investigated by microcalorimetry. The curing was completed after 5.3 × 105, 4.2 × 105, 3.6 × 105, and 3.2 × 105 s at 303.15, 313.15, 323.15, and 333.15 K, respectively.
Yiyi Xiao +6 more
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Abstract The isothermal curing kinetics of hydroxyl-terminated polybutadiene (HTPB) binder system containing dioctyl sebacate (DOS) and polyaryl polyisocyanate (PAPI) was investigated by microcalorimetry. The curing was completed after 5.3 × 105, 4.2 × 105, 3.6 × 105, and 3.2 × 105 s at 303.15, 313.15, 323.15, and 333.15 K, respectively.
Yiyi Xiao +6 more
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Journal of Propulsion and Power, 2015
A1 = mole fractions of hydroxyl groups on monofunctional moieties A2 = mole fractions of hydroxyl groups on difunctional moieties A3 = mole fractions of hydroxyl groups on trifunctional moieties a = empirical constant b = empirical constant C1 = intercept C2 = slope d = relative contents of difunctional moieties Eb = elongation at break ENCO = number ...
V. Sekkar, Thakur Sudesh Kumar Raunija
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A1 = mole fractions of hydroxyl groups on monofunctional moieties A2 = mole fractions of hydroxyl groups on difunctional moieties A3 = mole fractions of hydroxyl groups on trifunctional moieties a = empirical constant b = empirical constant C1 = intercept C2 = slope d = relative contents of difunctional moieties Eb = elongation at break ENCO = number ...
V. Sekkar, Thakur Sudesh Kumar Raunija
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Journal of Macromolecular Science, Part A, 2017
ABSTRACTA possibility of extending the pot life of the HTPB-TDI based propellant binder system without adverse modification of mechanical properties is explored in the present study. It is proposed that by tailoring functionality distribution of the base HTPB polymer and changing the binder composition concurrently, the pot life of the binder system ...
V. Sekkar +3 more
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ABSTRACTA possibility of extending the pot life of the HTPB-TDI based propellant binder system without adverse modification of mechanical properties is explored in the present study. It is proposed that by tailoring functionality distribution of the base HTPB polymer and changing the binder composition concurrently, the pot life of the binder system ...
V. Sekkar +3 more
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Combustion and Flame, 2017
Abstract Free-standing nanoparticles are a ubiquitous requirement for high-efficiency catalytic applications. Here, we report the catalytic pyrolysis of hydroxyl terminated polybutadiene (HTPB) binder in composite propellant by free-standing CuO nanoparticles synthesized through a novel aqueous thermolysis synthetic route.
Kranthi Chatragadda, Anuj A Vargeese
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Abstract Free-standing nanoparticles are a ubiquitous requirement for high-efficiency catalytic applications. Here, we report the catalytic pyrolysis of hydroxyl terminated polybutadiene (HTPB) binder in composite propellant by free-standing CuO nanoparticles synthesized through a novel aqueous thermolysis synthetic route.
Kranthi Chatragadda, Anuj A Vargeese
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Hot Spot Interaction with Hydroxyl-Terminated Polybutadiene Binder in Energetic Composites
The Journal of Physical Chemistry C, 2018Binders play a pivotal role in solid propellants and polymer-bonded energetic composites by providing the means for safe transport, storage, and use. The fundamental role of binders is known qualitatively, but the exact role in the modification of chemistry and thermal transport is hard to quantify.
Kaushik Joshi, Santanu Chaudhuri
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Journal of Applied Polymer Science, 2011
AbstractWe synthesized a ferrocene‐based burning rate catalyst, 2‐(ferrocenylpropyl) dimethylsilane (FPDS). FPDS‐grafted hydroxyl‐terminated polybutadiene (FPDS‐g‐HTPB) was synthesized using hydrosilylation with a Pt catalyst. The structures of FPDS and FPDS‐g‐HTPB were investigated by Fourier transform infrared spectroscopy and nuclear magnetic ...
Bong‐Sang Cho, Si‐Tae Noh
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AbstractWe synthesized a ferrocene‐based burning rate catalyst, 2‐(ferrocenylpropyl) dimethylsilane (FPDS). FPDS‐grafted hydroxyl‐terminated polybutadiene (FPDS‐g‐HTPB) was synthesized using hydrosilylation with a Pt catalyst. The structures of FPDS and FPDS‐g‐HTPB were investigated by Fourier transform infrared spectroscopy and nuclear magnetic ...
Bong‐Sang Cho, Si‐Tae Noh
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Journal of Applied Polymer Science, 2002
AbstractSolid composite propellants contain 80–90% of a crystalline oxidizer like ammonium perchlorate and powdery metallic fuel like aluminum with 10 to 15% organic binders like HTPB or CTPB, to bind the solids together and maintain the shape under severe stress and strain environment.
B. M. Bandgar +3 more
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AbstractSolid composite propellants contain 80–90% of a crystalline oxidizer like ammonium perchlorate and powdery metallic fuel like aluminum with 10 to 15% organic binders like HTPB or CTPB, to bind the solids together and maintain the shape under severe stress and strain environment.
B. M. Bandgar +3 more
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Propellants, Explosives, Pyrotechnics, 2022
AbstractThis paper reviews hydroxyl‐terminal polybutadiene (HTPB) used as liner and binder for composite propellants, applied in rocket motors studied throughout the last decades, emphasizing the recent advances. The contribution aims to show the importance of HTPB in the propellant composition and on the liner coating of the rocket motor, which is in ...
Javier Carlos Quagliano Amado +3 more
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AbstractThis paper reviews hydroxyl‐terminal polybutadiene (HTPB) used as liner and binder for composite propellants, applied in rocket motors studied throughout the last decades, emphasizing the recent advances. The contribution aims to show the importance of HTPB in the propellant composition and on the liner coating of the rocket motor, which is in ...
Javier Carlos Quagliano Amado +3 more
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