Water influence in poly(epichlorohydrin) synthesis: An intermediate to energetic propellants

Sciamareli, Jairo; Cassu, Silvana Navarro; Iha, Koshun

doi:10.5028/jatm.2012.04016011

Cited by 6 publications

(5 citation statements)

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“…Following that, in Fig. 2 d, small absorption band around 755 cm −1 can determine CH 2 –Cl functional group in the ECH structure 46 . Two broad absorption bands around 1098 cm −1 and 1064 cm −1 can be related to the epoxy group of ECH 47 .…”

Section: Resultsmentioning

confidence: 53%

Design and synthesis of a novel nanocomposite based on magnetic dopamine nanoparticles for purification of α-amylase from the bovine milk

Eivazzadeh‐Keihan

Dogari

Ahmadpour

et al. 2021

Sci Rep

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In this paper, a novel nanocomposite based on magnetic nanoparticles decorated by dopamine were reported. Three modified magnetic nanocomposites by dopamine were offered with different type of linkers. The mentioned magnetic nanocomposites were applied to separate α-amylase protein from fresh bovine milk. All of the magnetic nanocomposites were characterized and investigated by using Fourier-transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, field-emission scanning microscope, X-ray diffraction pattern, and vibrating-sample magnetometer analyses. To investigate the purifying application, sodium dodecyl sulfate polyacrylamide gel electrophoresis, one-dimensional isoelectric focusing gel electrophoresis, and alpha-amylase activity assay were employed. With paying attention to factors such as yield of purification and concentration of separated protein by each of magnetic nanocomposite, it could be concluded that the length of linkers played an important role in α-amylase protein separation. According to the results, the best separation and purification of α-amylase protein with 49.83% recovery and 40.11-fold purification efficiency was related to longest length linker, 1,4-butanediol diglycidyl ether, because of considerable conjugation with nanocomposite. Also, docking calculation has shown that the binding energy is − 1.697 kcal/mol and ΔG = − 6.844 kcal/mol which result that the interaction process between dopamine and α-amylase protein is spontaneous.

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Section: Resultsmentioning

confidence: 53%

Design and synthesis of a novel nanocomposite based on magnetic dopamine nanoparticles for purification of α-amylase from the bovine milk

Eivazzadeh‐Keihan

Dogari

Ahmadpour

et al. 2021

Sci Rep

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“…This confirms the presence of modifier in the bitumen. In the FTIR spectra of bitumen modified with sodium alginate and crosslinking agent, a wide band at a wavelength of about 1150 cm −1 is present, which was attributed to C-O-C linkage [ 37 ]. This group of atoms is characteristic of the epoxy structures present in the epichlorohydrin molecule.…”

Section: Resultsmentioning

confidence: 99%

Use of New Green Bitumen Modifier for Asphalt Mixtures Recycling

et al. 2022

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Nowadays, an increasing amount of reclaimed asphalt pavement (RAP) is being produced from the reconstruction and/or modernisation of asphalt pavements. It is necessary to recycle the obtained RAP according to principles of sustainable development. Therefore, this work includes the design of asphalt mixtures containing RAP with bio-derived modifier and evaluates their performance properties. Crosslinked sodium alginate was applied for bitumen modification. The studies were carried out for four different modifier contents, i.e., 1.0%, 2.5%, 4.0% and 5.5%, with and without crosslinking agent. On the basis of the binder test results, the optimal amount of the additive was found to be 2.5%. The nanostructure analysis for the base and modified binders indicated a dual crosslinked biopolymer effect. As a result of the bee structure size decrease, the binder softening effect was observed. The asphalt mix properties showed that application of biopolymer-modified binder is fully justified due to the functional parameters of the mixture, especially the increased resistance to water and frost by about 9%.

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“…A composição do polímero determinada por análise elementar foi de 36,2% de C, 5,2% de H e 41,8% de N [12] . Cloro foi encontrado em quantidades desprezíveis, indicando a completa substituição dos átomos de cloro por grupos azidas.…”

Section: Figura 1 Estrutura Química Do Gapunclassified

“…Tem calor de formação positivo (975 kJ/kg), o qual fornece fácil e rápida decomposição do polímero a temperaturas relativamente baixas. Em adição, GAP tem boa compatibilidade com oxidantes de alta energia [6,12] . A Figura 1 apresenta a estrutura química do GAP.…”

Section: Introducãounclassified

“…Dessa forma, neste trabalho, como contribuição às pesquisas para o sistema GAP/ADN e GAP/ AP, está sendo dado foco à análise FT-IR, nas regiões NIR e MIR, visando verificar possíveis interações que ocorram no sistema GAP/ADN, na temperatura entre 60-65°C, faixa usada para manufatura de propelentes, mostrando os principais grupos funcionais, cujas bandas sofrem alterações espectrométricas, tais como variações de intensidade e deslocamento em relação aos números de onda iniciais. Uma pequena quantidade de propelente GAP/ADN foi preparada em escala laboratorial, segundo as metodologias desenvolvidas nos laboratórios do IAE [4,9,12] . Foi feita também uma avaliação MIR do sistema GAP/AP, ou seja, com oxidante mais comumente utilizado.…”

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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Water influence in poly(epichlorohydrin) synthesis: An intermediate to energetic propellants

Abstract: Poly(epichlorohydrin) was synthesized using anhydrous and hydrate stannic chloride, separately, as initiator.

Cited by 6 publications

References 0 publications

Design and synthesis of a novel nanocomposite based on magnetic dopamine nanoparticles for purification of α-amylase from the bovine milk

Design and synthesis of a novel nanocomposite based on magnetic dopamine nanoparticles for purification of α-amylase from the bovine milk

Use of New Green Bitumen Modifier for Asphalt Mixtures Recycling

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

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