Results 111 to 120 of about 1,626 (157)

Cellulose organic solvents. I. The structures of anhydrous N-methylmorpholine N-oxide and N-methylmorpholine N-oxide monohydrate

Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 1981
International ...
Maia, E., Peguy, A., Perez, S.
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Responsive and patterned cellulose nanocrystal films modified by N-methylmorpholine-N-oxide

Carbohydrate Polymers, 2020
A type of cellulose solvent, i.e., aqueous N-methylmorpholine- N-O xide (NMMO) solutions, was used to modify cellulose nanocrystal (CNC) photonic films. CNC films can be swollen by NMMO, resulting in red-shifted reflected colors. The swelling effect is supposed to come from NMMO permeation into the crystalline regions of individual CNCs and ...
Yu Zhang, Zhongjian Tian, Yingjuan Fu, Zhaojiang Wang, Menghua Qin, Zaiwu Yuan   +5 more
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Heterogeneity in the system cellulose-N-methylmorpholine-N-oxide

Fibre Chemistry, 1987
Data obtained by the turbidity spectrum method indicate a comparatively high heterogeneity of cellulose solutions in N-methylmorpholine-N-oxide monohydrate. The particle size of the disperse phase depends on the temperature-time regime of solution preparation.
V. N. Smirnova, Yu. Ya. Belousov, M. M. Iovleva   +2 more
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Structural transformations in the N-methylmorpholine N-oxide-water system

Fibre Chemistry, 1997
The structural and phase transitions in formation of anhydrous MMO during vacuum drying of DH-MMO and MH-MMO were investigated. The characteristics of the structural changes in MH-MMO in repeated processing of the sample in a heating-cooling regime were determined.
L. K. Kuznetsova, L. K. Golova, G. Ya. Rudinskaya, T. A. Lyubova, N. V. Vasil'eva, O. E. Borodina   +5 more
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Rheological properties of concentrated cellulose solutions in N-methylmorpholine-N-oxide

Fibre Chemistry, 1990
-- Rheological properties of concentrated solutions of cellulose in N-mcthylmorpholine-N-oxide on varying the concentration of cellulose in the solution from 10 to 28% by wt. have been studied. -- It has been found that on increasing the cellulose content of the solution, the viscoelastic properties of the solution qualitatively change.
L. P. Braverman, V. V. Romanov, O. B. Lunina, T. P. Belasheva, G. G. Finger   +4 more
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Homogeneous alkalization of cellulose in N-methylmorpholine-N-oxide/water solution

Cellulose, 2017
Alkali cellulose is an important intermediate in the production of cellulose derivatives. N-methylmorpholine-N-oxide (NMMO)/H2O was used as a homogeneous reaction medium for the cellulose alkalization process to intensify the alkalization degree and improve the substitution uniformity.
Yong Zhang, Shengwei Tang, Tao Zhang
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Spectral features of the N-methylmorpholine-N-oxide-water-cellulose system

Polymer Science U.S.S.R., 1986
Abstract The spectral featuresof N-methylmorpholine-N-oxide (MMO) — a solvent for cellulose — have been studied. Temperature studies show that the IR-spectroscopic features of the phase state of the hydrated and anyydride forms of MMO disappear in the melt state.
T.A. Belousova, M.V. Shablygin, Yu.Ya. Belousov, L.K. Golova, S.P. Papkov   +4 more
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Solutions of mixtures of cellulose and synthetic polymers in N-methylmorpholine-N-oxide

Polymer Science Series A, 2009
Phase state and morphological features of solutions of cellulose blends with rigid-chain thermotropic LC copolyesters and isotropic poly(m-phenyleneisophthalamide) in the highly polar donor solvent N-methylmorpholine-N-oxide are studied by DSC and polarization microscopy.
L. K. Golova, I. S. Makarov, E. P. Plotnikova, G. Sh. Shambilova, A. K. Tereshin, V. G. Kulichikhin   +5 more
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Mechanism of the interaction of dimethyl sulfoxide with N-methylmorpholine-N-oxide Monohydrate

Russian Journal of Physical Chemistry, 2006
The interaction of dimethyl sulfoxide with N-methylmorpholine-N-oxide (NMMO) monohydrate was studied by the NMR relaxation method. The mobility of DMSO molecules in the presence of NMMO monohydrate decreases due to the formation of a hydrogen bond between the water molecule of the monohydrate and a DMSO molecule.
E. S. Sashina, N. P. Novoselov
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Aqueous N-methylmorpholine N-oxide as a new medium for alkylation of pyrazoles

Chemistry of Heterocyclic Compounds, 2018
It is shown that alkylation of pyrazoles with (E)/(Z)-1,3-dichlorobut-2-enes can be carried out in an alkaline aqueous medium in the presence of N-methylmorpholine N-oxide. In some cases, this technique may substitute phase-transfer catalysis. Conformational analysis of the reaction products showed that a mixture of (E)/(Z) isomers is formed in a ratio
Ani H. Hasratyan, Ashkharuhi G. Alexanyan, Hasmik N. Khachatryan, Geghetsik B. Zakaryan, Sargis S. Hayotsyan, Gevorg G. Danagulyan, Hovhannes S. Attaryan   +6 more
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