Zobrazeno 1 - 10
of 239
pro vyhledávání: '"S.G. Entelis"'
Publikováno v:
Journal of Molecular Catalysis. 64:15-22
The kinetics of n-butanol addition to isocyanate in the presence of organotin compounds and their polymer-supported analogues has been investigated. The functionalized polymer chain creates steric hindrances to the formation of non-reactive complexes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::404b581ae3a1e1f96bdc3de89196b043
https://doi.org/10.1016/0304-5102(91)85124-k
https://doi.org/10.1016/0304-5102(91)85124-k
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Publikováno v:
Polymer Science U.S.S.R.. 21:1364-1372
Results are presented of a study of the kinetics of, and molecular-weight relationships in, polymerization of epoxides (propylene oxide and epichlorohydrin) by various Lewis acids. They show that polymerization of epoxides under the influence of diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a49072f3e9c1341cdda650df8fd8b130
https://doi.org/10.1016/0032-3950(79)90040-6
https://doi.org/10.1016/0032-3950(79)90040-6
Publikováno v:
Polymer Science U.S.S.R.. 23:889-901
The mechanism of the bulk polymerization of tetrahydrofuran (THF) with the BF 3 +oxypropylene catalysts system has been studied at 20°C. The kinetic data of the MWD changes were obtained for the growing macromolecules, the total product, the concent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9005558aa005146923fdf2c78be931d
https://doi.org/10.1016/0032-3950(81)90474-3
https://doi.org/10.1016/0032-3950(81)90474-3
Publikováno v:
Polymer Science U.S.S.R.. 18:2051-2057
The materials investigated by IR spectroscopy homo- and copolymers of oxides of ethylene and propylene, differing as to composition and MW, and as to the distribution of monomer units. The analysis covered the range 700–4000 cm−1, the temperature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efdaf34060014ba6fb407302ee1cad7b
https://doi.org/10.1016/0032-3950(76)90390-7
https://doi.org/10.1016/0032-3950(76)90390-7
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 25:287-290
1. In both the first and second mechanism steps, bis (4-isocyanatophenyl)methane (I) has been shown to react more slowly with n-butanol than does 2,2-bis-(4-isocyanatophenyl)hexafluoropropane (II). 2. Arrhenius factors have been evaluated for the rea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::530dd913e03ce64555385c977347de0f
https://doi.org/10.1007/bf00922459
https://doi.org/10.1007/bf00922459
Publikováno v:
Polymer Science U.S.S.R.. 19:844-850
The kinetics of deactivation in the polymerization of THF, initiated by the system BF3-propylene oxide, has been studied dilatometricly and by the method of determining the concentration of active sites under dry conditionss (H2O]
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b4e75d9238e01b586c7c46f0d479c8c
https://doi.org/10.1016/0032-3950(77)90238-6
https://doi.org/10.1016/0032-3950(77)90238-6
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
https://doi.org/10.1016/0032-3950(78)90370-2
Publikováno v:
Polymer Science U.S.S.R.. 17:697-702
In the light of quantum chemical analysis of HNCO and of the HNCO-pyridine complex, data were obtained by use of the extended Huckel method concerning charge distribution and electron populations of bonds in the NCO group and concerning charges in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bd8bb5e433b8c4bdad8628f087215e2
https://doi.org/10.1016/0032-3950(75)90145-8
https://doi.org/10.1016/0032-3950(75)90145-8