Studies on the High Performance Characteristics of an Aluminized Ammonium Perchlorate Composite Solid Propellant Based on Nitrile Butadiene Rubber

• Autorzy: Sudhir Singh , Sidharth Raveendran , Dhirendra Kshirsagar R. , Gupta Manoj , Chetan Bhongale

Identyfikatory

DOI

10.22211/cejem/145030

• Języki publikacji: EN

Abstrakty

EN

n the present study, a high performance composite solid propellant formulation was prepared based on nitrile butadiene rubber (NBR) and dibutyl phthalate (DBP) plasticizer, which has a longer pot life and high density specific impulse. The developed cost effective novel binder system was prepared with readily available raw materials (NBR and DBP). The formulation of the composition was performed by varying the content of the NBR/DBP binder in the range of 14-20%. The rocket performance characteristics were determined theoretically using PROPEP and compared with those of an HTPB based propellant. The rheological, mechanical, physical, ballistic and thermal properties of the NBR/DBP propellant were studied and compared with literature data for similar compositions based on an HTPB/dioctyl adipate (DOA) binder. The yield stress was determined by spreadibilty measurements, and indicated the superiority of this binder based propellant over existing composite propellants. It was concluded that following decreasing the content of the NBR/DBP binder in the propellant from 20 to 14%: in the range 58.83-78.45 bar (5.883-7.845 MPa), the pressure index increased from 0.159 to 0.371, – at 68.64 bar (6.864 MPa), the burning rate increased from 4.10 to 6.54 mm/s, but the theoretical specific impulse value did not change significantly (258.0259.8 s), – the tensile strength and E-modulus increased from 6.03 to 9.88 (0.591-0.969) to and from 18.00 to 75.00 kgf/cm2 (1.765 to 7.355 MPa), respectively. Moreover, a DSC and TGA study indicated a lower decomposition temperature for the NBR/DBP propellant compared to the HTPB propellant. The NBR/DBP propellant exhibited a pot life more than double that of a conventional HTPB/ DOA based propellant.

Słowa kluczowe

EN

composite solid propellant; dibutyl phthalate; high density specific impulse; nitrile-butadiene rubber; pot life; spreadibility; yield stress

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2021
• Tom: Vol. 18, no. 4
• Strony: 492--511
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Sudhir Singh

• High Energy Material Research Laboratory, Sutarwadi, Pune 411021, India

• https://orcid.org/0000-0002-3901-2733

autor

Sidharth Raveendran

• High Energy Material Research Laboratory, Sutarwadi, Pune 411021, India

autor

Dhirendra Kshirsagar R.

• High Energy Material Research Laboratory, Sutarwadi, Pune 411021, India

autor

Gupta Manoj

• High Energy Material Research Laboratory, Sutarwadi, Pune 411021, India

autor

Chetan Bhongale

• Defence Institute of Advanced Technology, Deemed University, Pune 411025, India

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