Effect of High Energy Materials on Sensitivity of Composite Modified Double Base CMDB Propellant System

M.K. Choudhari; S.S. Dhar; P.G. Shrotri; Haridwar Singh

doi:10.14429/dsj.42.4393

M.K. Choudhari Explosives Research & Development Laboratory, Pune
S.S. Dhar Explosives Research & Development Laboratory, Pune
P.G. Shrotri Explosives Research & Development Laboratory, Pune
Haridwar Singh Explosives Research & Development Laboratory, Pune

DOI: https://doi.org/10.14429/dsj.42.4393

Keywords: Double base matrix

Abstract

The shock sensitivities (viz, impact and friction) of composite modified double-base (CMBD) ingredients, double-base (DB) matrix (SNC:CL) and the effect of high energy materials like ammonium perchlorate (AP), cyclotrimethylene trinitramine(RDX), cyclotetramethylene tetranitramine (HMX) and pentaerythritol tetranitrate (PTN) on a CMDB system, have been studied. Individual ingredients of DB matrix, i.e., spheroidal nitrocellulose (SNC) and desensitised nitroglycerine (casting liquid (CL), do not appear to be very sensitive to impact and friction, impact of 36.0 kg each. Various DB mixtures gave impact ranging between 56.5 to 61.5 cm and friction insensitivity of 36.0 kg for all the formulations. But addition of AP to DB matrix increases the impact and friction sensitivity tremendously, impact ranging from 15 to 24 cm and friction from 2.0 to 3.2 kg. Sensitivity-wise addition of RDX, HMX, and PETN to DB matrix follows AP while the addition of Al slightly reduces the sensitivity.

Author Biographies

M.K. Choudhari, Explosives Research & Development Laboratory, Pune

Mr MK Choudhri received his MSc in Chemistry from University of Poona. He has been working in ERDL for the last 30 years and engaged in the field of solid rocket/gun propellants. He has several papers published to his credit. He is a member of High Energy Materials Society of India . Currently, he is actively engaged in the area of Guided Missile Programme

S.S. Dhar, Explosives Research & Development Laboratory, Pune

Mr SS Dhar received his MSc. in Chemistry from University of Poona and has been working in ERDL for the past 7 years. He has published about 8 research papers to his credit and currently engaged in the field of so lid rocket propellants .

P.G. Shrotri, Explosives Research & Development Laboratory, Pune

Mr PG Shrotri, currently working as Scientist Fat ERDL, Pune, obtained his MSc from Nagpur University in 1961. At ERDL , he has contributed to the developmen t of various classes of propellants during the last 20 years. Presently, he is the Gro up Director and Chief Coordinator of ERDL for IGMDP. Mr Shrotri has about 15 research papers to his credit

Haridwar Singh, Explosives Research & Development Laboratory, Pune

Explosives Research & Development Laboratory, Pune