Zobrazeno 1 - 10
of 90
pro vyhledávání: '"I.Ya. Poddubnyi"'
Autor:
N.V. Veretennikov, I.M. Dolgopol'skii, I.Ya. Poddubnyi, Ye.G. Erenburg, A.I. Konshin, L.V. Pavlova
Publikováno v:
Polymer Science U.S.S.R.. 26:901-905
The effect of polymerization temperature and pressure on M distribution of vinylidene fluoride-3-oxaperfluorohex-1-ene copolymers was studied. It was shown that M distribution curves of samples synthesized at 60 and 95° and a pressure of 24 atm are
Publikováno v:
Polymer Science U.S.S.R.. 25:426-433
A study has been made of the influence of the polymerization temperature on the MWD of copolymers of vinylidene fluoride with fluorovinyl ether. Copolymers synthesized at 30° have a unimodal MWD, and a narrow maximum in the high-molecular weight por
Publikováno v:
Polymer Science U.S.S.R.. 22:2316-2326
It was shown that in the range of gravimetric ratios of 1
Autor:
A.V. Podalinskii, I.Ya. Poddubnyi
Publikováno v:
Polymer Science U.S.S.R.. 18:1251-1257
A study has been made of the equilibrium distribution of macromolecules between sol and gel phases formed during limited dissolution of gel containing butadiene-nitrile rubbers in good solvents. The problem of how this distribution is influenced by t
Autor:
I.Ya. Poddubnyi, N.B. Zaitsev
Publikováno v:
Polymer Science U.S.S.R.. 17:1299-1305
The thermal degradation of polystyrene (PS) has been investigated over a temperature range of 300–570° by the pyrolytic gas chromatography method, with pulsed conditions of pyrolysis and microgramme portions of polymer. Separate stages in the ther
Autor:
I.Ya. Poddubnyi, V.A. Grechanovskii
Publikováno v:
Polymer Science U.S.S.R.. 17:2483-2493
Information is presented on the properties of elastomers containing supermolecular formations of different structure. Methods are described for isolating these formations, including static solution and analytical centrifugation. The relationship betw
Autor:
L.V. Pavlova, Ye.G. Erenburg, I.M. Dolgopol'skii, I.Ya. Poddubnyi, R.L. Rabinovich, A.I. Konshin, Ye.O. Osipchuk
Publikováno v:
Polymer Science U.S.S.R.. 20:431-435
The molecular weight distribution (MWD) of vinylidene fluoride-perfluoromethylvinyl ether copolymers prepared by emulsion polymerization has been investigated by elution fractionation in a column. An equation has been derived for the dependence of in
Publikováno v:
Polymer Science U.S.S.R.. 22:177-186
The light scattering method has been used to measure catalyst particles in the process of isoprene polymerization with the catalyst system TiCl 4 Al(isoC 4 H 9 ) 3 and with modified forms of this system. It is shown that catalyst dispersion doe
Autor:
A.M. Greis, A.I. Konshin, Ye.O. Osipchuk, L.V. Pavlova, I.Ya. Poddubnyi, Ye.G. Erenburg, I.M. Dolgopol'skii
Publikováno v:
Polymer Science U.S.S.R.. 21:2496-2502
Elution fractionation in a column has been used to study the MWD of the vinylidene fluoride emulsion copolymer with 3,7-dioxaperfluoro-1-octene (VF-DOPFO copolymer). The dependence of the intrinsic viscosity on the mol.wt. has been established and th
Publikováno v:
Polymer Science U.S.S.R.. 16:216-225
By combined measurements of intrinsic viscosities and the sedimentation constants of solutions of fractions in a θ-solvent a study was made of molecular branching of cis -polybutadiene obtained by the use of a composite catalyst prepared from π -al