Search

Your search keyword '"Yantsen, N. V."' showing total 14 results
Start Over Author "Yantsen, N. V."
14 results on '"Yantsen, N. V."'

11. Modified Synthesis of 1-(4-R1-Phenyl)-3-(4-R2-phenyl)-5-phenylverdazyls.

Author

Kostryukov, S. G., Kozlov, A. Sh., Konushkin, I. A., Krasnov, D. A., and Yantsen, N. V.

Subjects
ATMOSPHERIC oxygen, TETRAFLUOROBORATES, ELECTRON paramagnetic resonance spectroscopy
Abstract

A modified procedure has been developed for the synthesis of Kuhn verdazyl radicals via conversion of 1-(4-R1-phenyl)-3-(4-R2-phenyl)-5-phenylformazan into 1-(4-R1-phenyl)-3-(4-R2-phenyl)-5-phenylver-dazylium tetrafluoroborates, followed by their reduction with D-glucose in alkaline medium to 1-(4-R1-phenyl)-3-(4-R2-phenyl)-5-phenylleucoverdazyls and oxidation of the latter with atmospheric oxygen. The formation of 1-(4-R1-phenyl)-3-(4-R2-phenyl)-5-phenylverdazyl radicals was confirmed by ESR spectroscopy. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

12. The influence of carbon black content on temperature dependences of electrical conductivity of polymer composite

Author

null Yantsen N. V., null Karpeev A. A., and null Zyuzin A. M.

Abstract

It was found that in the region of the percolation threshold, depending on the dominance of one or another conduction mechanism, the temperature dependence of the specific volume resistivity rho(T) of the polymer composite based on a matrix of ethylene vinyl acetate is significantly transformed. With an increase in the CB content, there is a decrease by several orders of magnitude in the maximum value of the relative resistivity rho(T)max/rho20 in its temperature dependence. Peroxide crosslinking of matrix macromolecules leads to a change in the nature of the temperature dependence of resistivity. Keywords: polymer composites, carbon black, electrical conductivity, temperature dependence.

Published
2022

Catalog

Books, media, physical & digital resources
See catalog results