Study of the Effect of DINA on the Polymorphic Transition of ε-CL-20 in Composite Modified Double Base Propellants

• Autorzy: Wu Zongkai , Zheng Wei , Pei Jiangfeng , Chen Zhiqun , Zhang Jun , Song Xiuduo , Wang Jiangning , Zhang Dongxiang , Zhao Fengqi

Identyfikatory

DOI

10.22211/cejem/139144

• Języki publikacji: EN

Abstrakty

EN

Abstract: The polymorphic transition of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazatetracyclo[5.5.0.05,9.03,11]dodecane (CL-20) is influenced by the materials and conditions used in the preparation of propellants, and limits the application of ε-CL-20 in solid propellants. In the present work, the effect of dinitroxydiethylnitramine (DINA) on the polymorphic transition of ε-CL-20 in CMDB propellants was investigated by Raman spectroscopy and the Calvet microcalorimeter method. The performance of propellants with CL-20 as affected by DINA was studied by the theoretical prediction of their energetic parameters, stability, combustion, and mechanical tests, respectively. The results showed that the polymorphic transition temperature of ε-CL-20 to α-CL-20 can be reduced to 75 °C by DINA. Expansion of the crystal volume during the process of the ε-CL-20 to α-CL-20 transition will produce obvious cracks in the surface of the crystals. NC/NG can inhibit the effect of DINA on the polymorphic transition of ε-CL-20. The theoretically predicted results indicated that adding DINA will not lower the energy level of CMDB propellants containing CL-20. The DSC and VST results showed that CL-20 has good compatibility and thermal stability with DINA. The burning rate tests revealed that adding DINA decreases the burning rates of CMDB propellants containing CL-20. Mechanical property testing showed that adding DINA can clearly improve the mechanical properties of CMDB propellants containing CL-20. The results of these investigations suggested that DINA has no effect on the crystalline stability of ε-CL-20 in the solventless extrusion process, which contributes to a significant understanding of practical applications and provides guidance for applied research on the use of CL-20 in propellants.

Słowa kluczowe

EN

CMDB propellant; CL-20; DINA; polymorphic transition

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2021
• Tom: Vol. 18, no. 2
• Strony: 165--182
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Wu Zongkai

• School of Chemistry and Chemical Engineering, Beijing institute of Technology, Xi’an Modern Chemistry Research Institute, 5 Zhongguancun South Street, Beijing, CN 1000081, China

autor

Zheng Wei

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

autor

Pei Jiangfeng

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

autor

Chen Zhiqun

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

autor

Zhang Jun

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

autor

Song Xiuduo

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

autor

Wang Jiangning

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

autor

Zhang Dongxiang

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

autor

Zhao Fengqi

• Xi’an Modern Chemistry Research Institute, 168 Zhangba East Street, Xi’an, CN 710065, China

Bibliografia

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