Cobalt copper ferrite: burning rate modifier for composite solid propellants and its catalytic activity on the thermal decomposition of ammonium perchlorate

Dave, Pragnesh N.; Thakkar, Riddhi; Sirach, Ruksana

doi:10.1007/s11164-021-04599-0

Cited by 11 publications

(6 citation statements)

References 45 publications

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“…13a and c), to calculate the activation energy ( E a , α ) at different conversions ( α ) from the mass change of AP thermal decomposition with increasing temperature. 40,41 The equations involved are shown below.where m 0 and m t are the initial mass of the sample and the mass at a given moment; and m ∞ is the mass at the end of the reaction.…”

Section: Resultsmentioning

confidence: 99%

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Gelatin-modified Mxene carbon aerogels for ammonium-perchlorate-catalyzed thermal decomposition

Yan¹,

Jin²,

Peng³

2023

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

Section: Isoconversional Approachmentioning

confidence: 99%

Gelatin-modified Mxene carbon aerogels for ammonium-perchlorate-catalyzed thermal decomposition

Yan¹,

Jin²,

Peng³

2023

Dalton Trans.

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“…The FWO and KAS methods were used to calculate the activation energies of AP and AP+CS-Pb-3.5 during the thermal decomposition process in relation to the conversion rate, and the relationship curves are shown in Figure . Figure a–d shows the experimentally measured ln(β i ) versus 1000/ T α and ln(β i / T α 2 ) versus 1000/ T α with AP and AP+CS-Pb-3.5 (10%), respectively. ,,− The activation energies of their regression curves and their corresponding R 2 values in the range of 0.1–0.9 are shown in Table . It can be seen that the activation energies of pure AP and AP+CS-Pb-3.5 at the same degree of conversion are dramatically different, indicating that the catalyst has the ability to reduce the activation energy of pure AP.…”

Section: Resultsmentioning

confidence: 99%

Preparation of a Chitosan-Lead Composite Carbon Aerogel and Its Catalytic Thermal Decomposition Performance on Ammonium Perchlorate

et al. 2022

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Chitosan-lead (CS-Pb) carbon aerogels were prepared by ionic cross-linking and high-temperature carbonization using chitosan (CS) as the carbon precursor. The obtained carbon aerogels were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS). The obtained aerogels have a 3D structure and a large surface area, which can effectively prevent the agglomeration phenomenon of metals. Differential thermal analysis (DTA) was used to analyze the catalytic performance of a carbon aerogel for ammonium perchlorate (AP). The results showed that the CS-Pb carbon aerogel reduced the peak temperature of AP pyrolysis from 703.9 to 627.7 K. According to the Kissinger method calculations, the E a of AP decomposition decreased about 27.2 kJ/mol. The TG data at different warming rates were analyzed by the Flynne−Walle−Ozawa (FWO) and Kissinger− Akahira−Sunose (KAS) methods, which are two of the isoconversion methods, and the activation energies of AP and AP+CS-Pb-3.5 were calculated. Between the conversion degrees (α) of 0.1 and 0.9, the E a values obtained by the two isoconversion methods are similar and have a certain match. Also, the two isoconversion methods confirm Kissinger's calculation. Finally, thermogravimetrymass spectrometry (TG-MS) was used to monitor the gases generated during the thermal decomposition of the AP+CS-Pb-3.5 system in real time.

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“…This equation can calculate the activation energy of the three characteristic peaks in the DSC curves according to the linear relationship between ln (β/T 1.92 ) and 1/T P . [34][35][36] The variation in the activation energy of the characteristic peaks was used to investigate the catalytic mechanism of the different structures of amines used for the cyanate curing process. Figures 18 and 19 shows the variation in the sample ln (β/T 1.92 ) versus 1000/T p ; the activation energy at different degrees of reaction formation can be estimated from the slope obtained for BECy-AN and BECy-AN/NNDPA.…”

Section: Activation Energy (E) Analysismentioning

confidence: 99%

Cure behavior and mechanism of cyanate ester with aromatic amines at room temperature

Zhou,

Guo,

Wang

et al. 2023

High Performance Polymers

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Herein, the catalytic effects of aromatic amines with different structures on the room temperature curing of bisphenol E cyanate (BECy) have been studied using differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) spectroscopy. Our results revealed that the mixed amine comprised of aniline and N,N-dimethyl-p-phenylenediamine (AN/NNDPA) bearing primary amino groups in its structure was a highly effective catalyst for the room temperature curing of cyanate esters. When the cyanate ester and mixed amine were combined at a molar ratio of 100:5 and cured at room temperature for 5 days, the curing degree of BECy resin reached 79.7%. The room temperature curing mechanism of the BECy-AN/NNDPA system was investigated using pyrolysis gas chromatography-mass spectrometry (PY GC-MS). Our results showed that the formation reactions of the intermediate structure and cyclotrimerization reactions occurred during the room-temperature curing process. The activation energies of BECy and different aromatic amine systems at different heating rates were determined using non-isothermal DSC. The results further demonstrated the catalytic effect of AN/NNDPA on the cyanate ester curing reaction. BECy-AN/NNDPA cured at room temperature has suitable heat resistance and a 5% weight loss temperature (Td5) of 361°C.

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Cobalt copper ferrite: burning rate modifier for composite solid propellants and its catalytic activity on the thermal decomposition of ammonium perchlorate

Cited by 11 publications

References 45 publications

Gelatin-modified Mxene carbon aerogels for ammonium-perchlorate-catalyzed thermal decomposition

Gelatin-modified Mxene carbon aerogels for ammonium-perchlorate-catalyzed thermal decomposition

Preparation of a Chitosan-Lead Composite Carbon Aerogel and Its Catalytic Thermal Decomposition Performance on Ammonium Perchlorate

Cure behavior and mechanism of cyanate ester with aromatic amines at room temperature

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