Zobrazeno 1 - 10
of 37
pro vyhledávání: '"V.M. Belyayev"'
Autor:
T.V. Kornilova, V.M. Belyayev, K.A. Vylegzhanina, G.A. Otradina, L.Ya. Madorskaya, O.K. Belomutskaya
Publikováno v:
Polymer Science U.S.S.R.. 32:812-817
Molecular mass distribution (MMD) and the size of latex particles were studied by GPC, electron microscopy and sedimentation analysis for poly(vinylidene fluoride) synthesized with potassium persulphate in the presence of emulsifier, and without it.
Publikováno v:
Polymer Science U.S.S.R.. 24:909-915
A method of gradient adsorption thin layer chromatography has been developed for fractionating statistical styrene-acrylonitrile copolymers containing from 4·5 to 44·7 wt.% of acrylonitrile. Using the proposed chromatographic system it is possible
Publikováno v:
Polymer Science U.S.S.R.. 16:268-271
Relations were calculated between branching parameters g and h and the number of branches f and the ratio between the length of branch and the length of ridges for comb-shaped branched polymers. It was shown that the use of ratios for g and h without
Publikováno v:
Polymer Science U.S.S.R.. 21:1875-1883
The intrinsic viscosities ([η]), the coefficients of diffusion ( D ) and the sedimentation constants ( S ) of fractions of a graft copolymer of vinyl acetate and ethylene have been measured. The MWD's of untreated samples of the copolymer and of the
Publikováno v:
Polymer Science U.S.S.R.. 24:1734-1742
Using styrene-acrylonitrile copolymers obtained by heterophase copolymerization in a precipitant hydrodynamic characteristics of solutions and light scattering in a number of solvents were studied for the first time. A number of hydrodynamic and conf
Publikováno v:
Polymer Science U.S.S.R.. 21:2097-2101
A method was proposed for the evaluation of polydispersion of styrene-acrylonitrile statistical copolymers according to two experimental parameters-limiting number of viscosity [η] and wetting index γ. From results obtained for fractions the experi
Autor:
V.F. Kazanskaya, V.M. Belyayev
Publikováno v:
Polymer Science U.S.S.R.. 20:2818-2824
The paper concerns Mark-Kuhn-Houwink relations obtained by different authors for the azeotropic copolymer of styrene and acrylonitrile. The molecular weight characteristics and long chain branching are estimated for the polydispersed styrene copolyme
Publikováno v:
Polymer Science U.S.S.R.. 31:184-190
The effect of γ-radiation on the molecular weight distribution and structure of high-molecular-weight polyethylene was studied with doses below the gelation level by measuring the sedimentation coefficients and molecular weights of samples before an
Publikováno v:
Polymer Science U.S.S.R.. 31:867-875
A method of preparing solutions of tetrafluoroethylene/sulphonyl fluoride copolymer is worked out, the MM is determined, and the structure of the copolymer macromolecules is studied. In DMAA this copolymer behaves as a polyelectrolyte. Stable molecul
Autor:
V.M. Belyayev, N.G. Podosenova, S.S. Ivanchev, O.N. Romantsova, O.S. Romanova, V.P. Budtov, G.A. Otradina
Publikováno v:
Polymer Science U.S.S.R.. 18:1150-1158
A study has been made of the radical graft polymerization of styrene on to a copolymer formed between styrene and 1-methacrylonyl-1-tert.butylperoxy ethane, which contains peroxide groups in its side chains. The kinetic features of the process have b