Synthesis and Characterization of Glycidyl Azide‐r‐(3,3‐bis(azidomethyl)oxetane) Copolymers

Kawamoto, Aparecida M.; Holanda, J. A. Saboia; Barbieri, U; Polacco, Giovanni; Keicher, Thomas; Krause, H.; Kaiser, Manfred

doi:10.1002/prep.200700221

Cited by 46 publications

(43 citation statements)

References 8 publications

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“…As shown in Fig. (A), the strong peak at 1135 cm −1 indicated the CO group present in ECH/TFEP copolymer, the strong peak at 1176 cm −1 was attributed to CF 3 , and the bands at 749 cm −1 were attributed to the CCl symmetric stretching vibrations . The disappearance of the CCl stretching band in the FTIR spectrum at 749 cm −1 and appearance of a new stretching band for CN 3 at 2100 cm −1 (Fig.…”

Section: Resultsmentioning

confidence: 83%

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

Xu¹,

Ge²,

Lu³

et al. 2017

Polym. Int.

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A novel energetic polymer, fluorine‐containing glycidyl azide polymer (FGAP), was developed via an initial cationic copolymerization of epichlorohydrin and 1,1,1‐trifluoro‐2,3‐epoxypropane, followed by azidation. The structure of FGAP was confirmed using Fourier transform infrared, 1H NMR and 13C NMR spectroscopies. The molecular weight and the thermal behavior of FGAP were characterized using gel permeation chromatography, differential scanning calorimetry and thermogravimetric analysis. FGAP had a molecular weight of 2845 g mol−1, and the glass transition temperature and decomposition temperature were found to be −47.8 and 253 °C, respectively. FGAP‐based polyurethane networks were further prepared using triphenylmethane‐4,4,4‐triisocyanate as the crosslinking agent. In comparison with GAP, FGAP‐based polyurethane networks exhibited better mechanical behaviors (a tensile strength of 1.5 MPa and an elongation at break of 81.6%). The results demonstrated that FGAP might be a promising polymeric binder for future propellant formulations. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 83%

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

Xu¹,

Ge²,

Lu³

et al. 2017

Polym. Int.

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“…1A were attributed to the C-Cl symmetric stretching vibrations. 22,23 When compared with the poly(TFEE-r-ECH) (Fig. 1A), a disappearance of the C-Cl stretching band in FTIR spectra at 745 cm À1 and appearance of a new stretching band for C-N 3 at 2102 cm À1 was shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Fluorinated glycidyl azide polymers as potential energetic binders

et al. 2017

RSC Adv.

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To improve the mechanical properties of glycidyl azide polymer (GAP)-based polyurethane network binders, a novel fluorinated glycidyl azide polymer, (2,2,2-trifluoro-ethoxymethyl epoxy-r-glycidyl azide) copolymer (poly(TFEE-r-GA)) was synthesized through an initial cationic copolymerization of epichlorohydrin and 2,2,2-trifluoro-ethoxymethyl epoxy, followed by azidation. The structure of poly(TFEE-r-GA) was characterized by FTIR, 1 H NMR, 13C NMR and GPC. DSC and TGA were used to investigate the thermal behavior of poly(TFEE-r-GA), the glass transition temperature and decomposition temperature of poly(TFEE-r-GA) were found to be À49.5 and 250 C, respectively. The copolyurethane networks were further synthesized by cross-linking poly(TFEE-r-GA) using trimethylolpropane as a chain extender agent, using isophorone diisocyanate as a cross-linking agent. In comparison with GAP, the poly(TFEE-r-GA) based copolyurethane networks exhibited relatively better mechanical properties, which had a tensile strength of 5.52 MPa, and an elongation at break of 162.8%. All the results indicated that the fluorine-containing GAP might serve as a potential energetic binder for future propellant formulations.

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“…The energetic binders can produce propellants systems in which metal fuels, such as aluminum, can be reduced. Glicidyl azide polymer (GAP) (Kawamoto et al 2008;Sciamareli et al 2009aSciamareli et al , 2009b, GAP/BAMO (Kawamoto et al 2010), poly[3,3-bis(azidomethyl)oxetane] (poly-BAMO) and 3-azidomethyl-3-methyl oxetane polymer (poly-AMMO) (Oliveira et al 2006(Oliveira et al , 2007Kawamoto et al 2009) have been studied by AQI group from Instituto de Aeronáutica e Espaço in the last decade.…”

Section: Introduction Studies About Binders Of Propellantsmentioning

confidence: 99%

Methodologies for Characterization of Aerospace Polymers/Energetic Materials - a Short Review

Pedreira

Pinto

Campos

et al. 2016

J.Aerosp. Technol. Manag.

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Fourier transform infrared spectroscopy techniques, associated or not to others, are a well-studied subject used for characterizing polymers/energetic materials that have been employed mainly in aerospace industries. However, the infrared analyses are usually qualitative and performed using the mid-infrared. This paper discusses the Fourier transform infrared spectroscopy qualitative and quantitative methodologies, coupled or not with thin layer chromatography and thermogravimetric analysis, for characterization of aerospace polymer systems, in some cases, using mid-infrared, near-infrared and far-infrared regions, by traditional accessories and the latest generation spectra mode, universal attenuated total reflection. This short review was made based on methodologies developed during the last two decades and published by many scientific and industrial research groups, emphasizing studies usually carried out in the last five years. A critical assessment and future trends were included.

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Synthesis and Characterization of Glycidyl Azide‐r‐(3,3‐bis(azidomethyl)oxetane) Copolymers

Cited by 46 publications

References 8 publications

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

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

Fluorinated glycidyl azide polymers as potential energetic binders

Methodologies for Characterization of Aerospace Polymers/Energetic Materials - a Short Review

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