Zobrazeno 1 - 10
of 37
pro vyhledávání: '"V.V. Mazurek"'
Publikováno v:
Reaction Kinetics and Catalysis Letters. 15:361-365
Polymerization of acrylonitrile by tris-(π-allyl)chromium-pyridine in dimethyl formamide has been studied. Assumptions on the nature of active centers are experimentally supported.
Autor:
B.N. Arkhangel'skaya, V.V. Mazurek
Publikováno v:
Polymer Science U.S.S.R.. 20:691-699
The anionic polymerization of methyl methacrylate (MMA) by the system Fe(AA)3Al(iso-Bu)2 (OBu)-2,2-dipyridyl in DMF at 25°C is a first order reaction with respect to initiator and monomer. The molecular weight of polymer varies in direct proporti
Autor:
A.M. Korshun, V.V. Mazurek
Publikováno v:
Polymer Science U.S.S.R.. 17:3055-3061
The system chromium acetylacetonate (I)-tri-isobutylaluminium (II)-pyridine (III) induces polymerization of acrylonitrile if the components are added in the strict order: I and II, then III and finally AN. It is shown that pyridine prevents the deact
Autor:
N. A. Shirokov, V.V. Mazurek
Publikováno v:
Polymer Science U.S.S.R.. 18:3068-3072
The initiating activity for the methyl methacrylate (MMA) anionic polymerization by tris-τ-allyl chromium (CrA3) rises sharply as a result of its reaction with pyridine at room temperature. Hydrolysing the reaction mixture after several days storage
Publikováno v:
Polymer Science U.S.S.R.. 21:1708-1717
A kinetic study has been made of the anionic polymerization of methyl methacrylate by the system A1Et 3 −2,2′-dipyridyl in toluene at −50°. The results show the reaction to be of the first order with respect to initiator and monomer concentrat
Publikováno v:
Reaction Kinetics and Catalysis Letters. 23:343-347
It has been established that the complex catalyst tris-(π-allyl) chromium-2,2′-dipyridyl initiates the effective polymerization of acrylonitrile in dimethylformamide in a wide temperature range.
Publikováno v:
Polymer Science U.S.S.R.. 23:1922-1928
A rapid polymerization of acrylonitrile has been observed in DMF at −60 to 0°C with tris-π-allyl chromium (CrA 3 ) and at −20 to −40°C with the CrA 3 -Py initiator complex. The polymerization is accompanied by a chain termination becoming mo
Publikováno v:
Polymer Science U.S.S.R.. 26:395-402
Anionic polymerization of methyl methacrylate in the presence of the modified system AlEt3-2,2′-dipyridyl in toluene at −50° takes place as a first order reaction with respect to monomer and third order with respect to initiator. The proposed ki
Autor:
A.M. Korshun, V.V. Mazurek
Publikováno v:
Polymer Science U.S.S.R.. 18:2024-2031
Methyl methacrylate polymerization in presence of the system chromium acetyl-acetonate-triisobutyl aluminium takes place in accordance with a mechanism of anionic type. A means of activating the system with 2,2′-dipyridyl at −60° was discovered.
Publikováno v:
Polymer Science U.S.S.R.. 10:555-569