Thermal decomposition of energetic thermoplastic elastomers of poly(glycidyl nitrate)

Abstract

Energetic thermoplastic elastomers (ETPEs) are futuristic binders for propellant/explosive formulations. Poly(glycidyl nitrate) (PGN)‐based ETPEs have excellent performance, including a high energy and high oxygen content. PGN‐based ETPEs were synthesized on PGN as a soft segment and hexamethylene diisocyanate extended 1,4‐butanediol as a hard segment by a prepolymerization method. The thermal behavior of the PGN‐based ETPEs was investigated by thermogravimetric analysis (TGA) and derivative thermogravimetry. A fitting strategy was adopted to study every stage of decomposition. The results show that the ETPEs had four main decomposition processes, and the peaks of each stage were at 212, 262, 322, and 414°C. The gas products were tested by TGA/Fourier transform infrared spectroscopy/mass spectrometry, and the main gas products of the samples were N2O, CH2O, C2H4O, and CO2. The previous results indicate the proposed mechanism of thermal decomposition. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40965.

Structure and mechanical properties of fluorine-containing glycidyl azide polymer-based energetic binders

“…Recent research in the field of energetic material formulations is aimed at developing high‐energetic binders, which not only can improve the internal energy and the overall oxygen balance of a propellant compared with conventional nonenergetic binders (like hydroxyl‐terminated polybutadiene), but also can be consistent with ecofriendly oxidizers like hydrazinium nitroformate, ammoniumdinitramide, etc. Generally, energetic propellant binders are supposed to contain energetic functional groups (explosophores) such as azido groups (N 3 ), nitrate esters (ONO 2 ), nitramines (NNO 2 ), C–nitro groups (CNO 2 ) and difluoramine groups (NF 2 ) along the polymer backbones …”

Thermal and structural characterization of copper(II) complexes with phenyl-2-pyridylketoxime (HPPK)

“…At lower temperature, mainly the evolution of CO 2 and H 2 O was observed [34]. At this temperature, there are also very weak peaks present, with maxima at 2070/2046 cm -1 , originating most likely from the oxime groups [34][35][36][37], and at 2239/2204, which could be attributed to the pyridyl ring's decomposition with N 2 O release [38]. Spectra registered at higher temperature indicate the release of CO 2 and H 2 O.…”

Synthesis, characterization, thermal stability, and compatibility properties of poly(vinylp‐nitrobenzal acetal)‐g‐polyglycidylazides

“…Therefore, the 22.97% mass loss observed in TGA curves of PVPNB-g24 # GAP at 248 C could be attributed to the breakdown of the azide group, 32 nitro group, 33 and urethane group. 34 The decomposed products of PVPNB-g24 # GAP at 305 C were mainly of CO 2 (2326 and 2286 cm 21 ) and esters fragments (1791 and 1771 cm 21 ).…”