Metal Fluorocarbon Pyrolants, XVI : Theoretical and Experimental Investigation of Poly[bis(2,2,2‐trifluoroethoxy)phosphazene] (PTFEP) as Oxidizer in Magnesium Based Pyrolants

Abstract

Consolidated magnesium/poly[bis(2,2,2‐trifluoroethoxy)phosphazene] (MPZ) pyrolants display a stable combustion regime between ξ(Mg) 30–83 wt‐%. The combustion rate increases with increasing magnesium content. Mixtures containing between 15–29 wt‐% Mg do ignite with a butane torch but extinguish rapidly thereafter. The combustion flames for each stoichiometric range exhibit particular features such as luminous carbon particles, after burn luminescence of Mg and burning Mg‐rich ejecta. UV/Vis spectra of the combustion flames show a distinct continuum superimposed from signals for transient CF2, Mg, MgF, MgO, P2+, PH, PN, and PO. The thermochemical calculation using NASA‐CEA indicate the highest adiabatic temperatures 1889 K at ξ(Mg)=35 wt‐%. The aerobic combustion of MPZ yields similar temperatures as common magnesium/polytetrafluoroethylene pyrolants.

Predicting composition of combustion products of the pyrotechnic based on Magnesium‐Teflon‐Viton

“…The combustion products has been investigated in references. [ 8,9,21‐25 ] The preferred combustion reaction products of MTV mixture is given in equation (): where, g, l, s letters symbolize phase states of gas, liquid, and solid, respectively.…”