Rheology of HTPB Propellant: Effect of Mixing Speed and Mixing Time

Muthaiah, Rm.; Manjari, R.; Krishnamurthy, V.; Gupta, B. R.

doi:10.14429/dsj.43.4328

Cited by 13 publications

(6 citation statements)

References 1 publication

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“…Mixing of the propellant compositions was performed in a 15 L vertical planetary mixer following set procedures [25]. The sequence of addition was as follows (with mixing after each incremental addition): binder (excluding TDI), antioxidant, catalyst, aluminium powder, AP (50 μm) and AP (300 μm).…”

Section: Preparation Of Composite Propellantsmentioning

confidence: 99%

Evaluation of Strontium Ferrite (SrFe12O19) in Ammonium Perchlorate-based Composite Propellant Formulations

Jain¹,

Kshirsagar²,

Khire³

et al. 2019

Cent. Eur. J. Energ. Mater.

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In the present work, various propellant compositions were prepared by incorporating strontium ferrite (SrFe12O19) in an ammonium perchlorate (AP), aluminium powder and hydroxyl-terminated polybutadiene (HTPB) based standard composite propellant. The compositions were then studied by assessing the effect of the SrFe12O19 content on the propellant slurry viscosity, and the mechanical and ballistic properties. The results showed that as the percentage of SrFe12O19 in the propellant was increased, the end of mix (EOM) slurry viscosity, tensile strength and E-modulus increased, while the elongation decreased. The ballistic properties data revealed that the burning rate of the propellant composition containing 1.0% SrFe12O19 was enhanced by around 15% (at 6.86 MPa) compared to the standard composition burning rate.

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Section: Preparation Of Composite Propellantsmentioning

confidence: 99%

Evaluation of Strontium Ferrite (SrFe12O19) in Ammonium Perchlorate-based Composite Propellant Formulations

Jain¹,

Kshirsagar²,

Khire³

et al. 2019

Cent. Eur. J. Energ. Mater.

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“…In this context, this behavior is similar to what happens when the mixing time is excessive because it would also reduce the average particle size of the ammonium perchlorate and, consequently, generate an increase in viscosity. 33 On the other hand, the increase in viscosity after the storage was much more accentuated in the process with a greater amount of propellant. This should be considered for processes that need storage before casting (an increase of 57.1% in viscosity for D, against 8.5% for B, and 4.1% for C).…”

Section: Monitoring Of Viscosity In the Preparation And In The Casting Of The Slurrymentioning

confidence: 98%

The influence of the type and size of the reactor and the influence of the heating interruption during curing on the solid composite propellant properties

Cunha

Rocco

2021

J of Applied Polymer Sci

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The solid composite propellant is a viscoelastic material that retains the treatment received during its all-useful life. As a result, its manufacturing conditions induce differences in its final mechanical properties. The present study aims to evaluate the influence of the type and size of the reactor and the effects of the heating interruption during curing on the final mechanical properties of the propellant. Thus, four production processes with identical propellant formulations were performed in four different reactors. One of them was vertical, while the others were horizontal reactors. The heating interruption during curing was performed in 10 samples, at different moments of the curing process and with different duration. The study determines that vertical reactors tend to produce propellants less rigid than those produced in the horizontal type. In addition, the bigger the reactor size, the less rigid the propellant becomes. Finally, the heating interruptions at the beginning of the curing process tend to be insignificant. However, when they occur in an advanced stage of the curing process, they tend to hinder the curing progress, being more significant for interruptions of medium duration.

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“…Propellant mixing followed standard procedures for HTPB\AP\Al‐type propellants, [7]. At the end of the mixing stage, a sample of the propellant was taken for viscosity measurement and pot life evaluation.…”

Section: Experimental Set‐upmentioning

confidence: 99%

Investigation of the Ablative Properties of an EPDM\Kevlar Insulator in a Solid Rocket Motor

Сапожников

Leitner

Natan

et al. 2021

Propellants Explo Pyrotec

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A study of the influence of the reinforced fiber orientation and the propellant aluminum content on the ablation and erosion performance of Ethylene Propylene Diene Monomer type insulation is presented. A subscale solid rocket motor has been used, with ammonium perchlorate and hydroxyl-terminated polybutadiene propellant composition. Seven static firing tests were conducted: six with low Al and one with high Al content. The EPDM ar-ticles had four different Kevlar fiber orientations: circumferential, longitudinal, diagonal (45°), and random. Numerical simulations were supplemented to decipher the experimental outcome. The numerical results exhibit an over-prediction tendency, yet they show that the examination of post-fire charring of the insulation is insignificant. The test results indicate that the longitudinal fiber orientation has the least ablative resistance.

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Rheology of HTPB Propellant: Effect of Mixing Speed and Mixing Time

Cited by 13 publications

References 1 publication

Evaluation of Strontium Ferrite (SrFe12O19) in Ammonium Perchlorate-based Composite Propellant Formulations

Evaluation of Strontium Ferrite (SrFe12O19) in Ammonium Perchlorate-based Composite Propellant Formulations

The influence of the type and size of the reactor and the influence of the heating interruption during curing on the solid composite propellant properties

Investigation of the Ablative Properties of an EPDM\Kevlar Insulator in a Solid Rocket Motor

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