Influence of Polytetrafluorethylene on the Mechanical and Safety Properties of a Composite Modified Double Base Propellant

• Autorzy: Sun S. , Zhang T. , Zhao B. , Zhang G. , Li X. , Luo Y.

Identyfikatory

DOI

10.22211/cejem/92444

• Języki publikacji: EN

Abstrakty

EN

A novel Composite Modified Double Base (CMDB) propellant, formed by mechanically mixing aluminium/polytetrafluorethylene (Al/PTFE) powders, was prepared through a rolling process. A variety of tests, such as tensile properties, particle size analysis etc., were carried out to study the influence of PTFE on the CMDB propellant properties. The PTFE deformed from particles to fibres under a uniform shear force, forming a fibre network which greatly improved the propellant’s mechanical properties. Compared to that of the CMDB propellant without PTFE, the elongation of the propellant containing 6% PTFE was increased by 26 times, and moreover, the impact strength was enhanced by 326% at −40 °C. Significantly, the propellant friction and impact sensitivities were reduced by 75.8% and 35.6%, respectively. In addition, the presence of PTFE in the propellant resulted in fluorination of the Al. The gaseous combustion product AlF3 reduced the propellant combustion agglomeration. Consequently, PTFE significantly promoted the propellant’s mechanical performance, decreased the shock (friction, impact) sensitivity and reduced combustion agglomeration.

Słowa kluczowe

EN

PTFE fibres; CMDB propellant; mechanical properties; mechanical sensitivity; combustion

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2018
• Tom: Vol. 15, no. 3
• Strony: 468--484
• Opis fizyczny: Bibliogr. 48 poz., rys., tab.

Twórcy

autor

Sun S.

• Beijing Institute of Technology, 5 South Zhongguancun St., Haidian District, Beijing 100081, China

autor

Zhang T.

• Beijing Institute of Technology, 5 South Zhongguancun St., Haidian District, Beijing 100081, China

autor

Zhao B.

• Beijing Institute of Technology, 5 South Zhongguancun St., Haidian District, Beijing 100081, China

autor

Zhang G.

• Beijing Institute of Technology, 5 South Zhongguancun St., Haidian District, Beijing 100081, China

autor

Li X.

• Beijing Institute of Technology, 5 South Zhongguancun St., Haidian District, Beijing 100081, China

autor

Luo Y.

• Beijing Institute of Technology, 5 South Zhongguancun St., Haidian District, Beijing 100081, China

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Uwagi

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