Preparation of flame-retardant HNS/DAAF energetic composite microspheres using droplet microfluidic technology

Materials Today Communications, Год журнала: 2023, Номер 38, С. 107788 - 107788

Опубликована: Дек. 5, 2023

Язык: Английский

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Effect of Water Absorption on Electric Properties of Temperature-Resistant Polymers

Polymers, Год журнала: 2024, Номер 16(4), С. 521 - 521

Опубликована: Фев. 15, 2024

The effects of water absorption on the electric resistivity and dielectric constant polyimide (PI) poly(ethylene terephthalate) (PET) were investigated, mechanism deterioration in electrical insulation properties was discussed. polyimides are poly(oxydianiline pyromellitimide) (PMDA–ODA) poly(para-phenylene diamine biphenyltetracarboxydiimide) (BPDA–PDA). These polymer films immersed pure for various immersion times at room temperature, ratio evaluated. resistance these measured temperature using a high-resistance meter, an LCR meter frequency range 200 kHz to 2 MHz. ratios equilibrium PMDA–ODA, BPDA–PDA, PET 2.7, 2.5, 0.5%, respectively. critical volume fraction percolation threshold conductivity due 0.034 both PMDA–ODA BPDA–PDA. On other hand, did not show significant decrease resistivity. For PIs PET, observed could be explained by series model respective capacitances polymer. Actually, samples cut from edges film after almost same value as that dry state. results suggest absorbed molecules uniformly dispersed but localized even has been reached.

Язык: Английский

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Controllable preparation of hexanitrostilbene (HNS) microspheres with multi-cavity structure to enhance safety and combustion performance

Powder Technology, Год журнала: 2024, Номер 449, С. 120397 - 120397

Опубликована: Окт. 25, 2024

Язык: Английский

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High-Throughput Fabrication of B/Fe2O3/F2603 MIC composite microspheres via microchannel technology

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 158481 - 158481

Опубликована: Дек. 1, 2024

Язык: Английский

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Prediction of crystal form and study on crystal growth characteristics of TKX-55—a novel heat-resistant energetic material

The Journal of Chemical Physics, Год журнала: 2025, Номер 162(16)

Опубликована: Апрель 22, 2025

5,5′-Bis(2,4,6-trinitrophenyl)-2,2′-bi(1,3,4-oxadiazole) (TKX-55) is a new type of heat-resistant energetic material with excellent detonation performance. To study the crystal particle morphology and size control TKX-55, this predicted structure TKX-55 through quantum chemistry molecular dynamics simulations as well simulated analyzed changes that occur under influence specific solvents habit modification. Based on simulation results, designed five different recrystallization methods prepared recrystallized products morphologies distributions. The growth mechanism was discussed. samples were characterized using scanning electron microscopy, powder x-ray diffraction, infrared spectroscopy techniques. thermal properties tested differential calorimetry thermogravimetric analysis. impact sensitivity sample tested, it found product significantly lower than raw material. Through combination experiment, ultimately obtained three rules, narrow distribution, effectively improved safety particles.

Язык: Английский

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Regulating the thermal stability and sensitivity of DNTF via refinement and encapsulation engineering

New Journal of Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

The refinement and encapsulation methods were combined to solve the issue of high sensitivity new energetic material DNTF, promoting its wide application in field materials.

Язык: Английский

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