Preprint Article Version 1 This version is not peer-reviewed

Reactive Energetic Plasticizers Utilizing Cu-Free Azide-alkyne 1,3-dipolar Cycloaddition for In-Situ Preparation of Poly(THF-co-GAP)-Based Polyurethane Energetic Binders

Version 1 : Received: 14 April 2018 / Approved: 16 April 2018 / Online: 16 April 2018 (08:22:59 CEST)

How to cite: Ma, M.; Kwon, Y. Reactive Energetic Plasticizers Utilizing Cu-Free Azide-alkyne 1,3-dipolar Cycloaddition for In-Situ Preparation of Poly(THF-co-GAP)-Based Polyurethane Energetic Binders. Preprints 2018, 2018040197 (doi: 10.20944/preprints201804.0197.v1). Ma, M.; Kwon, Y. Reactive Energetic Plasticizers Utilizing Cu-Free Azide-alkyne 1,3-dipolar Cycloaddition for In-Situ Preparation of Poly(THF-co-GAP)-Based Polyurethane Energetic Binders. Preprints 2018, 2018040197 (doi: 10.20944/preprints201804.0197.v1).

Abstract

Reactive energetic plasticizers (REPs) coupled with hydroxy-telechelic poly(glycidyl azide-co-tetrahydrofuran) (PGT)-based energetic polyurethane (PU) binders for use in solid propellants and plastic-bonded explosives (PBXs) were investigated. The generation of gem-dinitro REPs along with a terminal alkyne stemmed from a series of finely designed approaches to not only satisfy the common demands as conventional energetic plasticizers but prevent the migration of plasticizers. The miscibility and rheological behavior of a binary mixture of PGT/REP with various REP fractions were quantitatively determined by differential scanning calorimetry (DSC) and rheometer, respectively, highlighting the promising performance of REPs in the formulation process. The kinetics on the distinct reactivity of propargyl vs. 3-butynyl species of REPs towards the azide group of the PGT prepolymer in terms of Cu-free azide-alkyne 1,3-dipolar cycloaddition (1,3-DPCA) was studied by monitoring 1H nuclear magnetic resonance spectroscopy and analyzing the activation energies (Ea) obtained using DSC. The thermal stability of the finally cured energetic binders with the incorporation of REPs indicated that the thermal stability of the REP/PGT-based PUs was maintained independently of the REP content. The tensile strength and modulus of the PUs increased with increasing the REP content. In addition, the energetic performance and sensitivity of REP and REP triazole species was predicted.

Subject Areas

reactive energetic plasticizer; 1,3-dipolar cycloaddition; polyurethane; energetic binder

Readers' Comments and Ratings (0)

Leave a public comment
Send a private comment to the author(s)
Rate this article
Views 0
Downloads 0
Comments 0
Metrics 0
Leave a public comment

×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.