Zobrazeno 1 - 10
of 21
pro vyhledávání: '"B.G. Belen'kaya"'
Autor:
B.G. Belen'kaya, Ye.B. Lyudvig
Publikováno v:
Polymer Science U.S.S.R.. 21:1373-1380
The equilibrium concentration and the stability of the three types of cations, present in the system during the cationic polymerization of ϵ-caprolactone (CP) will sharply decrease as indicated. There will be no ionic associations in the presence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eeb0c570e52385527c28808223ef2a65
https://doi.org/10.1016/0032-3950(79)90041-8
https://doi.org/10.1016/0032-3950(79)90041-8
Autor:
B.G. Belen'kaya, Yu.P. Vauchskii, A.A. Vel'ts, A.L. Izyumnikov, Ye.D. Rogozhkina, Ye.B. Lyudvig
Publikováno v:
Polymer Science U.S.S.R.. 28:1976-1984
The mechanism of the cationic polymerization of ϵ-caprolactone initiated by p -toluenesulphonic acid in the presence of ethylene glycol was studied. Ethylene glycol sharply increases the rate of the process, transforming it to the hydroxomechanism w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89f0576d2a3e1a9fafcff19e6206adb0
https://doi.org/10.1016/0032-3950(86)90421-1
https://doi.org/10.1016/0032-3950(86)90421-1
Autor:
Ye.B. Lyudvig, B.G. Belen'kaya
Publikováno v:
Polymer Science U.S.S.R.. 20:639-646
The rate of β-propiolactone (PL) polymerization over (C2H5)2HOSbF6 as initiator in CH2Cl2 or CH3NO2 is described by the equation: v=kpKc12 [M]/[M]0χ (12 ⩽ χ ⩽2) typical for the cationic polymerization of lactones on triplet ions. The process m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5700ce8062fbf13102240f5bc486a16
https://doi.org/10.1016/0032-3950(78)90150-8
https://doi.org/10.1016/0032-3950(78)90150-8
Publikováno v:
European Polymer Journal. 17:1097-1101
Detailed kinetic analysis of cationic polymerization of β-propiolactone initiated by Et2HO+SbF6− or p-toluene sulphonic acid and electroconductivity data indicate that in both cases ion triplets of the type act as active centres and that most of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfefa4d513d5bacb309d6a7792db5743
https://doi.org/10.1016/0014-3057(81)90034-3
https://doi.org/10.1016/0014-3057(81)90034-3
Publikováno v:
Polymer Science U.S.S.R.. 20:2219-2226
The heat content, C ° p , of ϵ-caprolactone (CL) and of its polymer (PCL) were determined between 13·8–350°K within 0·3% error limits. The temperatures and the enthalpies of their transitions were also investigated. The values of H °( T ), S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2a03ec6666db211cefa938d0a642ab4
https://doi.org/10.1016/0032-3950(78)90388-x
https://doi.org/10.1016/0032-3950(78)90388-x
Publikováno v:
Acta Polymerica. 34:754-761
The mechanism of cationic polymerization of lactones in the presence of hydroxyl-containing compounds (hydroxomechanism) has been studied taking as an example the polymerization of β-propiolactone, e-caprolactone, glycolide and lactide. In this mech
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bbb045800b4094d8c85b1720396caa9
https://doi.org/10.1002/actp.1983.010341118
https://doi.org/10.1002/actp.1983.010341118
Publikováno v:
Polymer Science U.S.S.R.. 24:306-313
Kinetic and PMR spectroscopic methods have been used to investigate the cationic polymerization of e-caprolactone initiated by (C 2 H 5 ) 3 O+SbF − in the presence of ethylene glycol at 20–60°C. Alcohols markedly increase the rate of polymerizat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46b0e370fd47fdce55fa1888dda9f35a
https://doi.org/10.1016/0032-3950(82)90176-9
https://doi.org/10.1016/0032-3950(82)90176-9
Publikováno v:
Polymer Science U.S.S.R.. 20:632-638
Complete dissociation of the growing chain ends into free ions has been shown by kinetic and conductometric methods to occur in the polymerization of β-propiolactone at 20°C over (C2H5)2 (HO)SbCl6 as initiator and in the initial stages of that of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fe78d3bf75386fd4d36add84342f197
https://doi.org/10.1016/0032-3950(78)90149-1
https://doi.org/10.1016/0032-3950(78)90149-1
Publikováno v:
Polymer Science U.S.S.R.. 21:2249-2256
This is a study of the isobaric heat content Cp° of β-propiolactone and its polymers in the 0–400°K range. The temperatures and the enthalpies of the physical transitions have been determined, the functions H° (T) − H° (0), S° (T) − S° (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7212f0070698ec1421bdb8315631e372
https://doi.org/10.1016/0032-3950(79)90164-3
https://doi.org/10.1016/0032-3950(79)90164-3
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