used isopropyl-ketone and tetrahydrofuran as fibers to study the effects of different solvents on the cationization of cellulose. When the solvent replaced 90% of the water, it greatly increased the degree of substitution and reaction efficiency. At the same time, the degree of cationization also...
On the other hand, EG showed superior activity in inhibiting condensation reactions; 16 and 46 wt.% tetrahydrofuran (THF) soluble and THF insoluble solid fractions were obtained from conversion in EtOH, while those numbers in EG were 45 and 23 wt.%, respectively. The Ni-based catalyst was ...
Because of the complete separation of tetrahydrofuran the residue was neither noxious nor polluting. However, the method caused a deposit to form on the wall of the distn. vessel which has to be removed mechanically. The addn. of a surfactant eliminates this defect....
In addition to the compounds of the formula (X), according to the present invention, it is also possible to use crosslinked or polymeric materials comprising repeat units based on the general formula (X) in crosslinked or polymerized form together with at least one inventive metal-carbene complex...
(a) is conjugated to a hydroxygallium phthalocyanine pigment, wherein the hydroxygallium phthalocyanine composite pigment has diffraction peaks at least at 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1°, and 28.3° on an X-ray diffraction spectrum with Bragg angle of 2θ±0.2°, using Cu—...
A method for reducing the content of cyclic ethers of a Polymerized oligomers of tetrahydrofuran.Process for the reduction of the content of cyclic oligomers of polymerization of tetrahydrofuran ether, alquileno oxide or tetrahidrofuranooxido of alquileno. Is to put in contact with a gas such as...
During the synthesis of B-POSS, Karstedt catalyst was used and tetrahydrofuran (THF) toluene or isopropanol were employed as solvent. The obtained B-POSS was washed with methanol or hexane and characterized by 1H-NMR, 29Si-NMR, (Fourier transform infrared spectroscopy) (FT-IR ) analysis. ...
82.9 g (0.227 mol) of hydroxy group-substituted triarylamine compound (structural formula B) obtained from 1) is dissolved in 400 ml of tetrahydrofuran and an aqueous sodium hydroxide solution (NaOH: 12.4 g, water: 100 ml) is dropwisely added thereto. The resulting solution is cooled to 5°...
14.The display of claim 1, wherein the elongated particles have an aspect ratio of 25:1 or more. 15.The display of claim 1, wherein the polymer is polymerized from a first compound, a second compound, and a third compound,wherein the first compound is selected from the group consisting...
an amine-terminated polyamide oligomer derived from a first fluorine-based aromatic diamine and an aromatic diamide dichloride is prepared, and the amine-terminated polyamide oligomer, a second fluorine-based aromatic diamine, an aromatic dianhydride, and a cycloaliphatic dianhydride are polymerized to pre...