HTPB-Polyurethane: A Versatile Fuel Binder for Composite Solid Propellant

Mahanta, Abhay Kumar; Pathak, Devendra Deo

doi:10.5772/47995

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…Today, hydroxyl-terminated polybutadiene (HTPB) is one of the most widely used binders [ 6 , 7 ]. It is a viscous liquid prepolymer, which typical molecular weight is roughly 3000 g/mol in this kind of application.…”

Section: Introductionmentioning

confidence: 99%

Solid Rocket Propellant Photo-Polymerization with an In-House LED-UV Prototype

et al. 2023

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Composite solid propellants have used cast molding production technology for many decades, with intrinsic limitations on production flexibility, promptness, and grain geometry, as well as environmental implications on toxicity and global carbon footprint. This traditional method involves the use of toxic chemicals, has a long processing time, requires high temperature, and the products have limited geometries. To overcome those issues, different photo-curable resins have been evaluated as possible matrices. In fact, the UV-curing process is fast and has low energy consumption. The photocuring reaction parameters of six different pristine formulations were evaluated by Fourier transform infrared spectroscopy analysis. After finding the optimal curing parameters, different composites were prepared by adding 75 or 80 wt% ammonium sulfate particles used as an inert replacement for the oxidant. The thermomechanical properties and thermal resistance of the UV-cured composites were characterized via dynamic thermal-mechanical and thermogravimetric analysis. Subsequently, the mechanical properties of the inert propellants were investigated by tensile tests. The most promising resin systems for the production of solid rocket propellants were then 3D printed by an in-house developed illumination system and the obtained object micro-structure was evaluated by X-ray computed tomography.

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Section: Introductionmentioning

confidence: 99%

Solid Rocket Propellant Photo-Polymerization with an In-House LED-UV Prototype

et al. 2023

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“…13 Experimentally, these three can be distinguished using Nuclear Magnetic Resonance (NMR), Infrared (IR) and Raman Spectroscopy, thereby enabling isomeric analysis of synthesized materials. [13][14][15][16] To indicate this variation, here we use the notation HTPBn_tcv to denote the relative t, c and v isomeric content of oligomers containing n monomeric units. Thus, for example, a trimer, comprising a single example of each monomeric unit, is labeled HTPB3_111 and a hexamer with the same compositional ratios, is labelled HTPB6_111.…”

Section: Introductionmentioning

confidence: 99%

Understanding and controlling the glass transition of HTPB oligomers

et al. 2021

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“…[3][4][5][6] Owing to its outstanding elasticity, toughness, and chemical resistance, and its sub-ambient glass transition temperature (T g ), 3,[7][8][9][10][11] HTPB-based PU has been regarded as one of the most suitable binders for composite solid-propellants. 12 It connects the oxidant and other fuel additives dispersed in composite solid-propellants via forming a PU network upon reacting with diisocyanate. 13 Consequently, the mechanical properties of HTPB-based propellants are largely determined based on the properties of HTPB-based PU.…”

Section: Introductionmentioning

confidence: 99%