Determination of CHN content in energetic binder by MIR analysis

Oliveira, José Irineu Sampaio de; Diniz, Milton Faria; Kawamoto, Aparecida M.; Dutra, Rita C. L.; Keicher, Thomas

doi:10.1590/s0104-14282007000100011

Cited by 8 publications

(7 citation statements)

References 4 publications

(2 reference statements)

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“…Análise MIR , correspondente à absorção do grupo CH 2 , 2100 e 1280 cm -1 , correspondente aos estiramentos simétrico e assimétrico do grupo N 3 e 1120 cm -1 , devido à forte absorção do grupo éter (C-O-C) [13] . …”

Section: Equipamentos/metodologiasunclassified

“…Nos últimos anos, tem sido uma constante a pesquisa de novos materiais energéticos para uso em propelentes [1][2][3][4] . Busca-se, entre outras características, materiais energéticos com grande estabilidade térmica e química, menos agressivos ao meio ambiente, fácil manuseio, permitindo alcançar melhor desempenho para foguetes, mísseis para sistemas de defesa e explosivos [5] .…”

Section: Introducãounclassified

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Avaliação por FT-IR de interações entre polímero energético e oxidante: GAP/ADN e GAP/AP

et al. 2014

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Resumo: A possibilidade de interação entre o sistema à base do polímero de azoteto de glicidila e da dinitramida de amônio (GAP/ADN) foi avaliada, por FT-IR, nas regiões do infravermelho médio (MIR) e infravermelho próximo (NIR). O sistema GAP e perclorato de amônio (GAP/AP), utilizando oxidante mais usual, foi analisado por MIR. Maiores alterações espectrométricas foram observadas para o sistema GAP/ADN. Foi observado um alargamento de bandas para ambos os sistemas na região entre 3100-3500cm Evaluation by FT-IR of the Interactions between Energetic Polymer and Oxidizer: GAP/ ADN and GAP/APAbstract: FT-IR spectroscopy, in the mid-infrared (MIR) and near infrared (NIR) regions, was used to investigate possible interactions in the polymer system made with glycidyl azide and ammonium dinitramide (GAP/ADN). The GAP and ammonium perchlorate (GAP/AP) system with the most usual oxidizer was studied by MIR. Major spectrometric changes were observed for the GAP/ADN system, with a broadening of the bands in the region between 3100-3500cm -1 , pointing to interactions between OH groups from GAP and NH 4 + groups from ADN or AP. Also noted were a decrease in band intensity for the N 3 group in GAP and an increased intensity of nitronium (NO 2 + ) of ADN, suggesting interaction between these groups in the GAP/ADN system.

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Section: Equipamentos/metodologiasunclassified

Section: Introducãounclassified

Avaliação por FT-IR de interações entre polímero energético e oxidante: GAP/ADN e GAP/AP

et al. 2014

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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%

“…In relation to FT-IR characterization methodologies of energetic materials used in propellants, it is possible to include the characterization of poly-AMMO and poly-BAMO and their precursors as energetic binders in the near-infrared (NIR), MIR and far-infrared (FIR) regions by Oliveira et al (2006). Their study was focused on the characterization of polymers containing energetic groups that have been synthesized at ICT (Fraunhofer Institute for Chemical Technology) group, an important Germany Research Center of propellants.…”

Section: Introduction Studies About Binders Of Propellantsmentioning

confidence: 99%

“…Bands near 980 cm -1 can be used to study the ring opening polymerization reaction of compounds containing azide and/or bromine. Oliveira et al (2007) analyzed azide polymers samples by FT-MIR in order to develop a quantitative methodology to determine the C, H and N content in energetic polymers used in propellants. The elemental analysis data were used as reference.…”

Section: Introduction Studies About Binders Of Propellantsmentioning

confidence: 99%

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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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Determination of Primary Amine Content in Bonding Agent Used in Composite Solid Propellants

Oliveira

Pires

Diniz

et al. 2014

Propellants Explo Pyrotec

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The primary amine content in tetraethylenepentamine (TEPA) and TEPAN, a bonding agent used in composite solid propellants, was determined by near infrared (NIR) spectroscopy and the results were compared to those obtained by potentiometry. The band at 4930 cm−1, which showed to be influenced only by primary amine groups, was chosen as the analytical band. The calibration curves based on isopropylamine (IPA) and isopropylamine/dibutylamine (IPA/DBA) mixtures proved to be suitable for determining the NH2 content of TEPA or of samples containing mixtures of NH and NH2 groups. It was found that TEPA contains 26.4 % of NH2 and 25.7 % of NH, and that TEPAN contains 0.5 % of NH2, confirming the low content of primary amine of this bonding agent. The lowest amine equivalent of TEPA is 31.1±0.3 g/eq, as determined by potentiometry, was found because this technique measures the total hydrogen content, including primary and secondary amines. The literature value of 62.6 g/eq for TEPA ACROS obtained by potentiometry in a non aqueous medium and related to the first inflection of the primary amine, validates the value obtained by NIR in this work for a similar type of amine. The equivalent weight obtained by NIR spectroscopy (62.7 g/eq) allowed to calculate the molar mass of TEPA of 195.6 g mol−1, which is close to the typical value of 200 g mol−1.

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Determination of CHN content in energetic binder by MIR analysis

Cited by 8 publications

References 4 publications

Avaliação por FT-IR de interações entre polímero energético e oxidante: GAP/ADN e GAP/AP

Avaliação por FT-IR de interações entre polímero energético e oxidante: GAP/ADN e GAP/AP

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

Determination of Primary Amine Content in Bonding Agent Used in Composite Solid Propellants

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