A [3 + 2] cycloaddition reaction using dialkyne and diazide comonomers, both bearing explosophoric groups, to synthesize energetic polymers containing furazan and 1,2,3-triazole ring as well as nitramine group in the polymer chain have been described. The developed solvent- and catalyst-free approach is methodologically simple and effective, the comonomers used are easily available, and the resulting polymer does not need any purification. All this makes it a promising tool for the synthesis of energetic polymers. The protocol was utilized to generate multigram quantities of the target polymer, which has been comprehensively investigated. The resulting polymer was fully characterized by spectral and physico-chemical methods. Compatibility with energetic plasticizers, thermochemical characteristics, and combustion features indicate the prospects of this polymer as a binder base for energetic materials. The polymer of this study surpasses the benchmark energetic polymer, nitrocellulose (NC), in a number of properties.
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http://dx.doi.org/10.3390/ijms24119645 | DOI Listing |
J Phys Chem B
January 2025
School of Environment and Safety Engineering, North University of China, Taiyuan, Shanxi 030051, PR China.
Energetic composite systems with uniform particle distributions are of considerable interest, but sedimentation is a persisting challenge. Tungsten carbide (WC, density: 15.36 g/cm) particles are promising cemented carbide particles owing to their desirable properties.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Tokyo Electron America, Inc., 2400 Grove Blvd., Austin, Texas 78741, United States.
Photoresists are thin film materials designed to transform an optimal image into a mechanical mask. Diverse exposure techniques such as photolithography induce modifications in the exposed areas that result in solubility changes that can then be selectively removed with appropriate agents (developers). Photoresist materials need to keep pace with the increasingly demand for feature size reduction.
View Article and Find Full Text PDFJ Chromatogr A
January 2025
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608 Taiwan.
Despite having identical physicochemical properties, chiral molecules require effective separation techniques due to their distinct pharmacological effects. Polysaccharide-based chiral stationary phases (CSPs) are widely used for chiral separations in liquid chromatography; however, the mechanisms of chiral recognition are not well understood. This research explored the adsorption, retention, and chiral recognition mechanisms of three amylose-based CSPs: Chiralpak ID, IF, and IG.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
The azido propellant, with high energy and low signature, has been a hotpot in the field of propellants. However, the risk of low heat resistance and mechanical performance restricts their range of applications in high-energy formulations. In this study, four azido propellants based on 3,3-bis (azidomethyl) oxetane-tetrahydrofuran copolyether (BAMO-THF) have been prepared, their basic physical properties including energetic properties, internal micro-structure and true density were studied; their tensile properties, dynamic mechanical performances, were investigated, the structure-properties relationship was proposed.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, SAR, China.
Advanced energetic composites possess promising properties and wide-ranging applications in explosives and propellants. Nonetheless, most metal-based energetic composites present significant challenges due to surface oxidation and low-pressure output. This study introduces a facile method to develop energetic composites Cutztr@AP through the intermolecular assembly of nitrogen-rich energetic coordination polymers and high-energy oxidant ammonium perchlorate (AP).
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