Results 171 to 180 of about 4,063 (203)

Dissolution of cellulose in mixtures of N-methylmorpholine-N-oxide with amines of varied nature

Polymer Science U.S.S.R., 1986
Abstract Calorimetric and viscometric methods have been used to investigate the dissolving capacity in relation to cellulose of a system based on N-methylmorpholine-N-oxide with amine additives of a varied nature over the concentration range 1–15%. It has been established that the amines speed up the process of dissolution of cellulose and increase ...
L.K. Golova, O.Ye. Andreyeva, V.G. Kulichikhin, I.D. Zenkov, Yu.Ya. Belousov, S.P. Papkov   +5 more
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Quantum-chemical study of the mechanism of dissolution of scleroproteins in N-methylmorpholine N-oxide

Russian Journal of General Chemistry, 2008
Complex formation of scleroprotein models with an N-methylmorpholine N-oxide solvent was studied by the semiempirical PM3 method.
E. S. Sashina, N. P. Novoselov, S. V. Toroshekova, V. E. Petrenko   +3 more
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Cellulose solutions in N-methylmorpholine-N-oxide (NMMO) – degradation processes and stabilizers

Cellulose, 2002
Efficient stabilization of cellulose solutions in NMMO(1) against side reactions and their harmful effects meansprevention of both homolytic and heterolytic side reactions, which is mainlyaccomplished by trapping radicals, formaldehyde, andN-(methylene)iminium ions (5).
Thomas Rosenau, Antje Potthast, Immanuel Adorjan, Andreas Hofinger, Herbert Sixta, Heinrich Firgo, Paul Kosma   +6 more
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Comparative analysis of effective atomic charges in the N-methylmorpholine-N-oxide molecule

Russian Journal of Physical Chemistry A, 2007
The literature data and our quantum-chemical electron density distribution calculations were compared with experiment for the N-methylmorpholine-N-oxide ...
N. P. Novoselov, E. S. Sashina, A. P. Kuznetsova, V. E. Petrenko   +3 more
openaire   +1 more source

Structure of Polyacrylonitrile Fibers Produced from N-Methylmorpholine-N-Oxide Solutions

Fibre Chemistry, 2019
Structural and morphological evolution of polyacrylonitrile (PAN) samples from starting powder of a ternary copolymer to fibers produced from concentrated solutions of PAN in N-methylmorpholine-N-oxide (NMMO) was studied using x-ray diffraction for the first time. X-ray exposures in transmission and reflection geometries allowed the structures of outer
I. S. Makarov, L. K. Golova, M. I. Vinogradov, I. S. Levin, S. E. Sorokin   +4 more
openaire   +1 more source

Cellulose Fibers from Solutions of Bacterial Cellulose in N-Methylmorpholine N-Oxide

Fibre Chemistry, 2019
Fibers of bacterial cellulose were obtained for the first time from solutions in N-methylmorpholine N-oxide (NMMO) by using the concept of solid-phase dissolution of bacterial cellulose. The mechanism of solid-phase dissolution of bacterial cellulose in NMMO is examined with due regard to the structural and morphological characteristics of native ...
I. S. Makarov, L. K. Golova, M. I. Vinogradov, I. S. Levin, T. I. Gromovykh, N. A. Arkharova, V. G. Kulichikhin   +6 more
openaire   +1 more source

Phase Transformations in a PAN–N-Methylmorpholine-N-Oxide–Water System

Colloid Journal, 2022
E. E. Palchikova, I. S. Makarov, M. V. Mironova, M. I. Vinogradov, L. K. Golova, V. G. Kulichikhin   +5 more
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Unusual Role of N-Methylmorpholine N-Oxide in the Radical Polymerization of Acrylonitrile

Polymer Science, Series B, 2022
R. V. Toms, S. S. Medvedeva, A. Yu. Gerval’d, N. I. Prokopov, A. V. Plutalova, V. G. Kulichikhin, E. V. Chernikova   +6 more
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Schematic phase diagram of the cellulose— N-methylmorpholine-N-oxide monohydrate system

Polymer Science U.S.S.R., 1989
Abstract Accumulated, published experimental data on the properties and special behavioural features of the cellulose-N-methylmorpholine-N-oxide monohydrate system, which contains information on phase transitions are discussed. On the basis of the accumulated data on the formation of a crystalline complex (inclusion compounds) of cellulose with a ...
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Kinetics of Dissolution of Polyacrylonitrile in N-Methylmorpholine-N-oxide in the Absence and Presence of Cellulose

Polymer Science, Series B, 2021
E. E. Palchikova, I. S. Makarov, M. I. Vinogradov, L. K. Golova, G. K. Shambilova, V. G. Kulichikhin   +5 more
openaire   +1 more source