Výsledky vyhledávání - "V.I. Valuyev"

Molecular weight distribution of polyurethanes prepared from oligomers

Autor: A.K. Romanov, V.V. Yevreinov, R.A. Shlyakhter, S.G. Entelis, V.I. Valuyev

Publikováno v: Polymer Science U.S.S.R.. 20:1537-1542

A study was made of the effect average molecular weights of initial oligomers containing hydroxyl and process conditions on molecular weight characteristics of linear polyurethanes obtained from them. Experimental molecular characteristics of resulti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba4033c805760da619294e25d3767b1b
https://doi.org/10.1016/0032-3950(78)90370-2

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Study of oligomerization of isoprene on initiation with hydrogen peroxide

Autor: V.P. Boiko, T.S. Dmitriyeva, V.K. Grishchenko, V.I. Valuyev, T.S. Yatsimirskaya, R.A. Shlyakhter

Publikováno v: Polymer Science U.S.S.R.. 24:1312-1318

Oligomerization of isoprene on initiation by hydrogen peroxide in solutions of methyl, ethyl, propyl and carbon-labelled isopropyl alcohols is studied. The radioactive label method reveals that the functionality of the oligomers for fragments of isop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75831db812b090abbf36090968240d8f
https://doi.org/10.1016/0032-3950(82)90403-8

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Use of the method of functionality type distribution to study the radical oligomerization of butadiene-1,3 initiated by hydrogen peroxide

Autor: Yu.L. Spirin, M.D. Korol'kova, R.A. Shlyakhter, Kh.M. Avanesova, O.S. Fal'kova, V.I. Valuyev

Publikováno v: Polymer Science U.S.S.R.. 16:2586-2589

The investigation of the functionality type distribution (FTD) in oligobutadiene obtained by radical polymerization enables the number of transfer acts in this process to be calculated and the ratio between the transfer and initiation constants to be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b9705890db231c341b1a12179ff024ed
https://doi.org/10.1016/0032-3950(74)90450-x

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Relations between molecular characteristics and the structure and properties of the oligodiene-urethane epoxide in the course of thermal ageing

Autor: A.B. Korennaya, V.I. Valuyev, G.K. Romanovskii

Publikováno v: Polymer Science U.S.S.R.. 27:1967-1973

A study has been made of changes occurring during thermal ageing and affecting molecular characteristics and the dynamic viscosity of an oligodiene that has urethane epoxy end-groups. The IR spectra, viscosity values and MWD are compared and discusse

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9546e548ea20bcfa957974d87b81113e
https://doi.org/10.1016/0032-3950(85)90222-9

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Effect of molecular weight distribution of oligodienes containing hydroxyl on fractionation according to functionality

Autor: R.A. Shlyakhter, I.B. Tsvetkovskii, N.N. Trizna, V.I. Valuyev, T.S. Dmitriyeva

Publikováno v: Polymer Science U.S.S.R.. 17:3006-3009

It was found that an increase in polydispersion according to the molecular weight of oligodienes containing hydroxyl causes a deterioration in the resolution of chromatographic bands during fractionation of these oligodienes according to types of fun

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c902e0ff8b266f85b231ecfc96e8db99
https://doi.org/10.1016/0032-3950(75)90446-3

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Study of the functionality distribution in various oligomers

Autor: I.Ya. Poddubnyi, V.I. Valuyev, Ye.G. Erenburg, R.A. Shlyakhter

Publikováno v: Polymer Science U.S.S.R.. 14:2674-2680

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a1b32effc014b5f12d23d291b7057305
https://doi.org/10.1016/0032-3950(72)90190-6

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Reactivity of hydroxyl end groups in a series of low molecular weight polyesters

Autor: R.A. Shlayakhter, Z.S. Korol'kova, S.G. Entelis, V.I. Valuyev, R.P. Tiger, N.P. Apukhtina

Publikováno v: Polymer Science U.S.S.R.. 9:217-224

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e65e758052c2f6c39681edb9ab3cf3c4
https://doi.org/10.1016/0032-3950(67)90346-2

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Molecular weight distribution of oligomeric linear complex polyesters

Autor: L.V. Mozzhukhina, R.A. Shlyakhter, L.P. Moskevich, N.P. Apukhtina, Ye.G. Erenburg, Ye.P. Piskareva, V.I. Valuyev

Publikováno v: Polymer Science U.S.S.R.. 9:2111-2116

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44c7d3bbe30c57cc6505a87857cbb11d
https://doi.org/10.1016/s0032-3950(68)80007-3

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Use of polydispersed fractions for calibration in gel permeation chromatography

Autor: I.B. Tsvetkovskii, R.A. Shlyakhter, V.I. Valuyev

Publikováno v: Polymer Science U.S.S.R.. 19:3046-3048

A description is given of a method of calibration used in GPC for polydispersed fractions assuming that their gel chromatographic curves are similar to Gaussian curves and the calibration dependence in semi-logarithmic coordinates is linear. In order

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0b69e25be74efff216f60f54c4c14a3d
https://doi.org/10.1016/0032-3950(77)90327-6

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