Design and Evaluation of the Thermal Properties of Di-, Tri- and Tetra-Azido-Esters

Abstract

A group of polycyclic and aliphatic azido-esters (as energetic plasticizers) have been synthesized by simple synthetic routes and their molecular structures were confirmed by spectroscopic techniques. In addition, their thermal and rheological properties have been determined utilizing DSC, TGA, viscosity, and contact angle. Computational studies of these plasticizers have been performed by means of DFT (B3LYP/6-31G*) to estimate possible stable structures, energies, heat of formation, bond dissociation energies, IR and NMR spectra etc. Their compatibility with glycidyl azide polymer (GAP) binder was studied to explore their applicability in propellants. All of these molecules are novel and have been synthesized with the possibility of scale up.

Synthesis and characterization of a novel azido fluoroalkyl oligoether energetic plasticizer

“…ACCEPTED MANUSCRIPT BANFHOB has a significantly higher oxygen balance value (-78.6%) than DBP (-224.2%) and most reported azido plasticizers [35][36][37][38][39]. This is due to its high fluorine content (49.4 wt%), which contributes substantially to its oxidizing capability.…”

Synthesis and Properties of 3‐Azido‐2,2‐bis(azidomethyl)propyl 2‐Azidoacetate: A Potential Azido Ester Plasticizer

“…Inert (non‐energetic) and energetic plasticizers are all used in propellant formulation . However, inert plasticizers have the disadvantage of reducing the energy output of the system.…”

“…[3][4] Inert (non-energetic) and energetic plasticizers are all used in propellant formulation. [5] However, inert plasticizers have the disadvantage of reducing the energy output of the system. Energetic plasticizers (EPs) are often preferred to inert plasticizers because EPs perform a dual task: retaining reasonable sensitivity, suppressing chemical reactivity, and ensuring a high thermal stability as one approaches oxygen balanced materials, creating the densest material possible.…”