Influence of Guanylurea Dinitramide (GUDN) on the Thermal Behaviour, Sensitivity and Ballistic Properties of the B-KNO3-PEC Ignition System

• Autorzy: Badgujar D. M. , Phatak S. , Wagh R. M. , Bhingarakar V. , Talawar M. B. , Kakade S. D.

Identyfikatory

DOI

10.22211/cejem/91124

• Języki publikacji: EN

Abstrakty

EN

Boron and potassium nitrate are the key components for the ignition system of the igniter composition for rocket propellants. Boron-potassium nitrate-ethyl cellulose (B:KNO3:PEC) in proportions of 30:70:10 is a well established igniter composition. The composition delivers a maximum pressure in the range 4.0-4.6 MPa in closed vessel firing at a loading density of 0.01 g/cm3. For the effective ignition of a large booster stage propellant (length more than 4 m), an enhancement in the maximum pressure, without affecting safety, is a prime requirement. The use of guanylurea dinitramide (GUDN) in an igniter composition has not been reported in the literature. Hence, the present study on the effect of GUDN on the combustion behaviour and sensitivity of the B/KNO3 composition (30/70) has been carried out. Several compositions containing different weight percents of GUDN were prepared. Their thermal behaviour was determined by thermal analysis DSC-TGA. Their sensitivities to external stimuli such as impact, friction and spark were evaluated. The results of closed vessel firings indicated that GUDN-based igniter compositions produced higher peak pressures (up to 4.5 MPa to 5.8 MPa), with invariably lower burning times, compared to the control composition. The REAL computer programme indicated an increase in the flame temperature of the composition from 2238 K to 2425 K on addition of GUDN. All of the compositions were insensitive towards friction up to 36 kg, and towards spark up to 5 J energy.

Słowa kluczowe

EN

ballistics; guanylurea dinitramide; igniter; sensitivity; thermal analysis

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2018
• Tom: Vol. 15, no. 2
• Strony: 315--326
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Badgujar D. M.

• High Energy Materials Research Laboratory, Sutarwadi, Pune – 411021, India

autor

Phatak S.

• High Energy Materials Research Laboratory, Sutarwadi, Pune – 411021, India

autor

Wagh R. M.

• High Energy Materials Research Laboratory, Sutarwadi, Pune – 411021, India

autor

Bhingarakar V.

• High Energy Materials Research Laboratory, Sutarwadi, Pune – 411021, India

autor

Talawar M. B.

• High Energy Materials Research Laboratory, Sutarwadi, Pune – 411021, India

autor

Kakade S. D.

• High Energy Materials Research Laboratory, Sutarwadi, Pune – 411021, India

Bibliografia

• [1] Bhingarkar, V. S.; Das, M. K.; Pathak, S. A.; Tamboli, A. A.; Rawal, S.; Kakade, S. D.; Gupta, M. Ignition Studies of Boron-potassium Nitrate System. Proc. 9th International High Energy Materials Conference and Exhibit, 2014, 1102-1104.
• [2] Bhingarkar, V. S.; Sarwadekar, R. G.; Sane, P. P. Role of Silicon in Boron Potassium Nitrate System. Def. Sci. J. 1997, 47(3): 365-371.
• [3] Lai, K. S. Boron Potassium Nitrate Ageing Study. 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Joint Propulsion Conference, 1998.
• [4] Blomquist, H. R. Gas Generating Compositions Comprising Guanylurea Dinitramide. Patent US 6117255, 2000.
• [5] Bottaro, J. C. Recent Advances in Explosives and Solid Propellants. Chem. Ind. 1996, 10: 249.
• [6] Bottaro, J. C.; Schmitt, R. J.; Penwell, P.; Ross, S. Dinitramide Salts and Method of Making Same. Patent US 5254324, 1993.
• [7] Ostmark, H.; Bemm, U.; Bergman, H.; Langlet, A. N-guanylurea Dinitramide: a New Energetic Material with Low Sensitivity for Propellants and Explosives Applications. Thermochim. Acta 2002, 384: 253-259.
• [8] Zhao, F.; Chen, P.; Yuan, H.; Gao, S.; Hu, R. Thermochemical Properties and Non-isothermal Decomposition Reaction Kinetics of N-Guanylurea Dinitramide (GUDN). Chin. J. Chem. 2004, 22: 136-141.
• [9] Langlet, A.; Ostmark, H.; Wingborg, N. Method of Preparing Dinitramidic Acid and Salts Thereof. Patent US 5976483, 1999.
• [10] Badgujar, D. M.; Wagh, R. M.; Pawar, S. J.; Sikder, A. K. Process Optimization for the Synthesis of Guanylurea Dinitramide (GUDN). Propellants Explos. Pyrotech. 2014, 39(5): 658-661.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).