Rheology of HTPB Propellant: Development of generalized correlation and evaluation of pot life

Muthiah, Rm.; Krishnamurthy, V.; Gupta, B. R.

doi:10.1002/prep.19960210405

Cited by 16 publications

(9 citation statements)

References 6 publications

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“…The isothermal viscosity level relates to the growth of the average molecular weight of the polymer chains and typically follows an exponential trend in the shape h(t) = h 0 exp(k h t) [20]. It has been observed that the solid loading has a significant effect on the process [21,22]. Papers relevant to the connection between curing viscosity and filler type were not retrieved in the open literature by the author.…”

Section: Introductionmentioning

confidence: 99%

Curing Viscosity of HTPB‐Based Binder Embedding Micro‐ and Nano‐Aluminum Particles

Maggi

2014

Propellants Explo Pyrotec

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Aluminum is used as a metal fuel in energetic materials for the improvement of propulsion performance and density. Both nano‐sized and micrometer‐sized activated powders represent valuable options in order to improve metal combustion properties, each possessing advantages and drawbacks. These ingredients bear peculiar properties (namely, higher specific surface, coatings, or surface characteristics) which generate high mixing viscosity once suspended in a polymer as well as altered mechanical properties of the final product. Four different powders dispersed in a polymer binder are taken into consideration and the evolution of viscosity in time during the curing process is investigated. The suspending medium is represented by a mixture of hydroxyl‐terminated polybutadiene (HTPB), isophorone diisocyanate (IPDI) and dioctyl adipate (DOA). Viscosity was measured for 5 h on samples under isothermal curing at 60 °C. Non‐isothermal DSC kinetic analyses were also performed using the Kissinger method. It was found that, for the test conditions, a size reduction of metal particles slowed down the increment rate of curing viscosity while some peculiar coatings, such as fatty acids, introduced opposite trends.

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Section: Introductionmentioning

confidence: 99%

Curing Viscosity of HTPB‐Based Binder Embedding Micro‐ and Nano‐Aluminum Particles

Maggi

2014

Propellants Explo Pyrotec

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“…It is capable of generating specific impulse up to 260s. HTPB is most preferred additive [7] because of its moderate (70 0 C) curing temperature and capability to generate better specific impulse [8]. Additionally it imparts good mechanical strength at low cost.…”

Section: International Journal Of Engineering Research and Technology (mentioning

confidence: 99%

Development of Green Propellants for Short Range Solid Rocket : an Overview

Pandey¹,

Bose²

2016

IJERT

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Choice of propellant primarily depends upon tactical applicability and deployment pattern of the weapon system. Solid propellants are preferred in short rockets as it provides major advantages of simplicity and quick deployment time as compared to its liquid counterpart. It has physical features like to quick response time and high reliability make solid propellant first tactical and technical choice for short range rocket. Solid rockets may be propelled by double base, composite or modified double base solid propellant. All these propellants cause smoky exhausts and unsuitable for environment and health hazards for the crew members. Development of green propellant is underway globally for rockets including short range rockets. The works on the green propellant have opened up new avenues and posed challenges for the high energy materials research community. The mechanical and ballistic properties of these formulations should be judiciously evaluated test fired and improved for further recommendation to use in the existing or new weapon systems. The same is equally applicable to short range solid rockets.

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“…Whereas India introduced their Nike-Apache Rocket in 1963. Another example is from Vikram Sarabhai Space centre, India where they successfully develop composites rocket propellants by using hydroxyterminated polybutadiene (HTPB) as binder and crystalline aluminium perchlorate plus with fine aluminium powder as oxidizer and metallic fuel [4]. Polyurethanes are a broad group of elastomers that may contain just one common element, a urethane linkage.…”

Section: 10 Introductionmentioning

confidence: 99%

Development of Solid Rocket Propellant based on Isophorone Diisocyanate – Hydroxyl Terminated Natural Rubber Binder

2014

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In this work, a novelty solid propellant based on Isophorone Diisocyanate (IPDI) with Hydroxyl Terminated Natural Rubber (HTNR) binder network was successfully developed. The preparation of Liquid Natural Rubber (LNR) by chemical degradation Deprotenized Natural Rubber (DPNR) using cobaltous was carried out. From the FTIR spectroscopy, a broad hydroxyl group peak at 3444cm-1 was obtained from HTNR. Rubber network depict a strong carbonyl group C=O at 1714cm-1 and amine group N-H at 3433cm-1. NMR analysis also proves that there was hydroxyl group presence in the sample where broad peak at range 1-3 ppm and 3.5 ppm peak for -HOCH2CH2CH2-. Four different mol ratio of HTNR with IPDI was carried out to find the best formulation with good properties as propellant. Flory-Rehner equation depict that only slightly increasing occur with higher IPDI mol ratio but mixing with Ammonium Perchlorate (AP) and Aluminium Powder (AL) significantly improve the crosslink density. Melting point for HTNR is near to room temperature and it increase abruptly after crosslink with IPDI up to range of 148-150 °C. For all formulation, cross section morphology showed occurrence of porosity and brittle type of failure however HTNR has good contact with AL and AP. 2 : 1 molar ratio depict the best burning rate but the combustion characteristic shows less energy and spark compared to HTPB binder.

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Rheology of HTPB Propellant: Development of generalized correlation and evaluation of pot life

Cited by 16 publications

References 6 publications

Curing Viscosity of HTPB‐Based Binder Embedding Micro‐ and Nano‐Aluminum Particles

Curing Viscosity of HTPB‐Based Binder Embedding Micro‐ and Nano‐Aluminum Particles

Development of Green Propellants for Short Range Solid Rocket : an Overview

Development of Solid Rocket Propellant based on Isophorone Diisocyanate – Hydroxyl Terminated Natural Rubber Binder

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