Results 11 to 20 of about 104,499 (295)

Facile Preparation and Properties of Crosslinked Copolyether Elastomers with 1,2,3‐Triazole and Urethane Subunit via Click Polymerization

open access: yesChemistryOpen, 2019
An azide terminated ethylene oxide‐tetrahydrofuran copolymer with urethane segments (ATUPET) as a novel binder pre‐polymer, has been prepared through ethylene oxide‐tetrahydrofuran random copolymer (PET) end‐capping modification via one‐pot method.
Dr. Qian Zhang   +6 more
doaj   +1 more source

A Family of Energetic Materials Based on 1,2,4-Oxadiazole and 1,2,5-Oxadiazole Backbones With Low Insensitivity and Good Detonation Performance

open access: yesFrontiers in Chemistry, 2020
Design and synthesis of new compounds with both high detonation performances and good safety properties have always been a formidable task in the field of energetic materials.
Qi Xue   +10 more
doaj   +1 more source

Research Progress on Chiral Supramolecular Sensors for Enantiomer Detection

open access: yesChemosensors, 2023
Chiral substances occur naturally in abiotic and living systems. The recognition and detection of chiral substances in the natural environment or their analysis and detection in biological systems are crucial.
Xiao-Fan Wu   +6 more
doaj   +1 more source

Novel Energetic Coordination Polymers Based on 1,5-Di(nitramino)tetrazole With High Oxygen Content and Outstanding Properties: Syntheses, Crystal Structures, and Detonation Properties

open access: yesFrontiers in Chemistry, 2019
In this study, a series of novel 1,5-di(nitramino)tetrazole (DNAT)-based bimetallic energetic coordination polymers, MK2(DNAT)2·4H2O [M = Fe, Cu, Ni, Co, and Zn], were designed and synthesized in a simple and convenient self-assembly synthetic process ...
Yanan Li   +7 more
doaj   +1 more source

Fluorine alopecia [PDF]

open access: yesEpidemiology and Infection, 1946
A high proportion of young men in this country suffer from premature baldness. Alopecia is not a disease entity but one of the outstanding features of chronic fluorine poisoning (fluorosis). It is frequently associated with dystrophies of other organs of ectodermal origin, namely, those of the skin and its other appendages, the teeth and nails.
openaire   +3 more sources

Extra contribution to the crystal stability of insensitive explosive TATB: The cooperativity of intermolecular interactions

open access: yesDefence Technology, 2023
An in-depth analysis on the cooperativity of intermolecular interactions including hydrogen bonding and π-π stacking in 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) crystal was studied.
Zhi-xiang Zhang   +7 more
doaj   +1 more source

Long‐Lasting and Rapid‐Responsive Media for Rewritable Information Storage Based on Low‐Cost N‐Substituted Maleimides Oligomers

open access: yesMacromolecular Materials and Engineering, 2020
Controllable synthesis of high‐performance materials with low‐cost is critical for the development of functional devices. Herein, a series of sequence‐controlled low‐dispersity oligomers with acid–base chromotropic capability via simple copolymerization ...
Congcong Zhai   +6 more
doaj   +1 more source

Nuclear Magnetic Resonance Fluorine—Fluorine Coupling Constants [PDF]

open access: yesThe Journal of Chemical Physics, 1964
The pattern of fluorine—fluorine coupling constants is explained on the basis of two mechanisms for nuclear spin—spin coupling: the ``through-bond'' and the ``through-space'' mechanisms. In the former, the interaction proceeds via the electronic structure in the intervening bonds.
Ng, Soon, Sederholm, C.H.
openaire   +2 more sources

Fluorine [PDF]

open access: yesAnnals of the ICRP, 1983
Considering the long time in which fluorine compounds have been used it seems rather surprising that it was not isolated as an element until 1886. This long delay was not due to lack of effort, but to the reactivity of fluorine and the hazards of working with it and many of its compounds.
Langley, Richard H., Welch, Larry
openaire   +2 more sources

The role of ultrasound in the nucleation kinetics and Modification of product properties of 3-Nitro-1,2,4-triazol-5-one

open access: yesUltrasonics Sonochemistry
3-Nitro-1,2,4-triazol-5-one (NTO), a well-known energetic material, is extensively employed in the field of insensitive munitions. However, its irregular crystal morphology and broad particle-size distribution hinder its wider application.
Xingquan Hu   +6 more
doaj   +1 more source

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