Synthesis of energetic polynuclear and polymeric nitroazole systems

Interaction of cyanuric chloride and its mono and dichloro derivatives with ammonium or sodium 4-nitro-1,2,3-triazolates and polymer-analogous transformations of tetrazole-containing polymers were used to synthesize polynuclear systems and macromolecular compounds with heterocyclic structures bearing explosophoric groups.     

Study of Fe85 –xCrxB15 (x = 0–20) Amorphous Alloys by the 11B Nuclear Magnetic Resonance Method

Doklady Physics - Amorphous alloys of Fe85 –xCrxB15 (x = 0–20) obtained by ultrafast melt quenching are investigated by the pulsed 11В nuclear magnetic resonance (NMR) method at a...     

Hyperfine interactions in Sc<Subscript>1−<Emphasis Type="Italic">x</Emphasis></Subscript>Y<Subscript>x</Subscript>Fe<Subscript>2</Subscript> cubic Laves alloys

Effects of hybridization of 3d bands of iron with 3d bands of scandium and 4d bands of yttrium in Sc_1?xY_xFe₂ cubic Laves alloys (0≤_x≤1) are studied by the nuclear magnetic resonance method. The concentration dependences of the lattice parameters a, saturation magnetization σ, and hyperfine fields at the ⁵⁷Fe, ⁴⁵Sc, and ⁸⁹Y nuclei—as well as the ²⁷Al impurity nuclei, whose atoms substitute iron atoms in the lattices of these alloys—are measured. The “local” and “induced” contributions to hyperfine fields at the ⁵⁷Fe nuclei are separated and the magnetic moments at iron atoms are estimated. It is found that the hybridization effect leads to the formation of magnetic moments at Sc and Y atoms (whose direction is opposite to the direction of the magnetic moment at iron atoms) and is responsible for the ferrimagnetic structure in Sc_1?xY_xFe₂ alloys.     

Hyperfine fields and magnetic moments in intermetallic ScFe2 with cubic and hexagonal structures

The Sc, Fe and Al NMR spectra have been measured. The spectra and hyperfine fields are dependent on the crystal structures. The magnetic moments of Fe sites were estimated. The magnetic moments of Sc sites μ(Sc) in ScFe₂ (MgCu₂) were evaluated from the magnetic moment per formula μ_∫ as well. μ_∫ in ScFe₂ with hexagonal structures are sharply dependent on the technological conditions and the impurities in the samples.     

Tetrazole-containing paired polymers

Paired polymers are obtained by the reaction between linear poly(5-vinyltetrazole) and poly(vinyl chloride) in the presence of triethylamine. Poly(vinyl chloride) plays the role of a macromolecular alkylating agent with respect to the tetrazole-containing polymer. The combination of two types of covalently linked macromolecules promotes in the paired polymers the manifestation of some properties typical for both homopolymers.