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Your search keyword '"Astapenko, E."' showing total 2 results
Start Over Author "Astapenko, E." Topic chloroform
2 results on '"Astapenko, E."'

1. Hydrodynamic, conformational, and optical properties of cellulose tridecanoate molecules in solutions.

Author

Bushin, S., Tsvetkov, N., Bezrukova, M., Astapenko, E., Lebedeva, E., Podseval'nikova, A., Ivanova, V., Pavlov, A., and Khripunov, A.

Subjects
HYDRODYNAMICS, CONFORMATIONAL analysis, CELLULOSE, SOLUTION (Chemistry), MOLECULAR weights, CHLOROFORM, TETRACHLOROETHANE, ORGANIC synthesis
Abstract

Cellulose tridecanoates of various molecular weights were synthesized, and their characteristics in chloroform and tetrachloroethane solutions were studied by methods of translational diffusion, velocity sedimentation, flow birefringence (Maxwell's method), and viscometry. The effects of solvent and temperature on the conformational characteristics of the macromolecules under consideration were examined. The anisotropy of the monomeric unit of cellulose tridecanoates was studied, and the contribution of pendant chains to the optical anisotropy of macromolecules of cellulose esters with aliphatic substituents was analyzed. [ABSTRACT FROM AUTHOR]

Published
2012
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2. Conformational, optical, and electrooptical properties of cellulose pelargonates in solutions.

Author

Tsvetkov, N. V., Bushin, S. V., Bezrukova, M. A., Astapenko, E. P., Ivanova, V. O., Mikusheva, N. G., Lebedeva, E. V., Podseval'nikova, A. N., Slavyanov, V. I., and Khripunov, A. K.

Subjects
POLYMERS, MOLECULAR weights, DIOXANE, CHLOROFORM, KERR electro-optical effect, DOUBLE refraction, CONFORMATIONAL analysis
Abstract

Newly prepared cellulose pelargonate samples of various molecular weights were studied in dioxane and chloroform solutions by isothermal translation diffusion, high-speed sedimentation, flow birefringence (Maxwell effect), electric birefringence (Kerr effect), and viscometry. The conformational, hydrodynamic, optical, electrooptical, and dynamic characteristics of the polymer were determined. [ABSTRACT FROM AUTHOR]

Published
2011
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