The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
R S Velichkova - One of the best experts on this subject based on the ideXlab platform.
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poly vinyl acetal s from poly vinyl alcohol and 4 Dimethylaminobenzaldehyde
European Polymer Journal, 1994Co-Authors: V D Toncheva, S D Ivanova, R S VelichkovaAbstract:Poly(vinyl acetal)s with different degree of acetalization have been synthesized from poly(vinyl alcohol) and 4-Dimethylaminobenzaldehyde. After quaternization and crosslinking they have been converted in ion exchange hydrogels. As quaternizing reagents ethylbromide, benzylchloride and p,p'-dichloroxylene have been used. The last has also proved to be a good crosslinking agent. Swelling, water uptake, ion-exchange capacity, electric conductivity of the films have been measured as a function of the degree of acetalization, quaternization and crosslinking. Thermal stability and mechanical properties have been also investigated.
V D Toncheva - One of the best experts on this subject based on the ideXlab platform.
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poly vinyl acetal s from poly vinyl alcohol and 4 Dimethylaminobenzaldehyde
European Polymer Journal, 1994Co-Authors: V D Toncheva, S D Ivanova, R S VelichkovaAbstract:Poly(vinyl acetal)s with different degree of acetalization have been synthesized from poly(vinyl alcohol) and 4-Dimethylaminobenzaldehyde. After quaternization and crosslinking they have been converted in ion exchange hydrogels. As quaternizing reagents ethylbromide, benzylchloride and p,p'-dichloroxylene have been used. The last has also proved to be a good crosslinking agent. Swelling, water uptake, ion-exchange capacity, electric conductivity of the films have been measured as a function of the degree of acetalization, quaternization and crosslinking. Thermal stability and mechanical properties have been also investigated.
S D Ivanova - One of the best experts on this subject based on the ideXlab platform.
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poly vinyl acetal s from poly vinyl alcohol and 4 Dimethylaminobenzaldehyde
European Polymer Journal, 1994Co-Authors: V D Toncheva, S D Ivanova, R S VelichkovaAbstract:Poly(vinyl acetal)s with different degree of acetalization have been synthesized from poly(vinyl alcohol) and 4-Dimethylaminobenzaldehyde. After quaternization and crosslinking they have been converted in ion exchange hydrogels. As quaternizing reagents ethylbromide, benzylchloride and p,p'-dichloroxylene have been used. The last has also proved to be a good crosslinking agent. Swelling, water uptake, ion-exchange capacity, electric conductivity of the films have been measured as a function of the degree of acetalization, quaternization and crosslinking. Thermal stability and mechanical properties have been also investigated.
U Madhusoodhanan - One of the best experts on this subject based on the ideXlab platform.
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growth and characterization of organic material 4 Dimethylaminobenzaldehyde single crystal
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015Co-Authors: R P Jebin, T Suthan, N P Rajesh, G Vinitha, U MadhusoodhananAbstract:Abstract The organic material 4-Dimethylaminobenzaldehyde single crystals were grown by slow evaporation technique. The grown crystal was confirmed by the single crystal and powder X-ray diffraction analyses. The functional groups of the crystal have been identified from the Fourier Transform Infrared (FTIR) and FT-Raman studies. The optical property of the grown crystal was analyzed by UV–Vis–NIR and photoluminescence (PL) spectral measurements. The thermal behavior of the grown crystal was analyzed by thermogravimetric (TG) and differential thermal analyses (DTA). Dielectric measurements were carried out with different frequencies by using parallel plate capacitor method. The third order nonlinear optical properties of 4-Dimethylaminobenzaldehyde was measured by the Z-scan technique using 532 nm diode pumped continuous wave (CW) Nd:YAG laser.
Ya A Strakov - One of the best experts on this subject based on the ideXlab platform.
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3 6 6 trimethyl 4 oxo 1 2 pyridyl 4 5 6 7 tetrahydroindazole in schmidt reaction and beckmann rearrangement conditions for the 4 hydroxyimino derivative
Chemistry of Heterocyclic Compounds, 2000Co-Authors: L G Delyatitskaya, M Petrova, S Grinberga, N N Tonkikh, Ya A StrakovAbstract:Treatment of 3,6,6-trimethyl-4-oxo-1-(2-pyridyl)-4,5,6,7-tetrahydroindazole with sodium azide in acids gives 3,7,7-trimethyl-5-oxo-1-(2-pyridyl)-5,6,7,8-tetrahydro(4H)pyrazolo[4,3-b]azepine. Heating 1-(2-pyridyl)-3,6,6-trimethyl- and 1-phenyl-6,6-dimethyl-4-hydroxyimino-4,5,6,7-tetrahydroindazoles in polyphosphoric acid gives 1-phenyl-5,6-dimethyl- and 1-(2-pyridyl)-3,5,6-trimethyl-4-aminoindazole respectively: The reactions of the latter with 4-Dimethylaminobenzaldehyde gave the 4-(4-dimethylaminobenzalamino) derivative and with 2-formyldimedone the 4-(4,4-dimethyl-2,6-dioxocyclohexylidenemethylamino) derivative.
