EFFECT OF COMPOSITION AND PROCESSING CONDITION ON MICROSTRUCTURAL PROPERTIES AND DURABILITY OF FLUOROPOLYMER/ACRYLIC BLENDS

Fluoropolymer blends have been widely used as binders for exterior coatings because of their excellent resistance to ultra-violet (UV) radiation as well as to many corrosive chemical agents.It is known that the fluorinated component usually has a lower glass transition temperature and easily crystallizes in the final structure depending upon the blend composition and sample annealing condition.We investigated the effect of blend composition and annealing process (slow and fast cooling) on the surface mor...     

Experimental exposure of nuclear emulsion by xenon nuclei at the JINR nuclotron

Nuclear emulsion was exposed to xenon nuclei accelerated at the JINR Nuclotron. Visual and automated scanning of the extracted beam profile was performed using the exposed emulsion film.     

Near Infrared Luminescence of Lanthanides in Complexes with Organic Dyes

Spectral-luminescence characteristics of Yb³⁺ and Nd³⁺ ions in water solutions of their complexes with some organic dyes of sulfophenylphthalexones group have been considered. Complexes can be efficiently excited with visible light (_exc = 532 nm). 4f-Luminescence as a result of energy transfer from the dye moiety to the lanthanide ion was shown. Complexation of new polydentate ligand L of sulfophenylphthalexones type increases the luminescence lifetimes because of the reduced solvation of the ion by water. They were determined as 12.60 s for complex Yb-L and 1.45 s for Nd-L.     

Complex domain structure in a magnetic film with oblique anisotropy

Analytical formulas have been derived to calculate the distortion of the stripe domain structure in a ferromagnetic film under the action of a bubble domain formed in this film. On the basis of the formulas obtained, an experimentally obtained domain configuration has been calculated. The results of the calculation coincide with the observation data within the experimental error.     

Relativistic alpha-particles from inelastic collisions of nuclei of24Mg in photoemulsion at 4.5 GeV/(c· nucleon)

The transverse momentum spectra and correlation characteristics of secondary -particles (fragments of the²⁴Mg nuclei) are studied. An excessive number of high-momentum -particles are found, which cannot be explained by the statistical model. It is shown that the azimuth correlations of -particles can be due to a large transverse momentum of the fragmenting residual magnesium nucleus.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 19–23, May, 1991.     

Luminescence of Ytterbium in Complexes with Cryptands Containing Bipyridine and Biisoquinoline Fragments

Some characteristics of 4fluminescence of an ytterbium ion with cryptands containing bipyridine and biisoquinoline fragments have been studied for the first time. The relationship has been established between the changes in these characteristics and the structure of a macrocyclic ligand in H₂O and D₂O at 295 and 77 K. It is shown that the highest intensities and lifetimes of 4fluminescence are observed in those complexes where a lanthanide ion is most effectively protected against water molecules.