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Publikováno v:
Polymer Science U.S.S.R.. 16:924-930
It is shown that in the cationic polymerization of β-propiolactone the introduction of ketones into a system leads to a bimolecular chain termination reaction. Kinetically this is reflected in a deviation of the reaction rate from first order with r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fac186b7b66ca7efbe42680ad289b26d
https://doi.org/10.1016/0032-3950(74)90200-7
https://doi.org/10.1016/0032-3950(74)90200-7
Publikováno v:
Polymer Science U.S.S.R.. 28:2464-2471
The kinetics and mechanism of cationic copolymerization of glycolide with L - and D , L -lactide under the action of SnCl 2 ·2H 2 O in the melt at 140–180°C is studied by PMR spectroscopy and gravimetric methods. The kinetics of the consumption o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ba7b2dc37e9f97c8e5d158c4224b076
https://doi.org/10.1016/0032-3950(86)90069-9
https://doi.org/10.1016/0032-3950(86)90069-9
Publikováno v:
European Polymer Journal. 17:1089-1095
Mechanistic features of the cationic copolymerization of lactones with cyclic ethers are studied for β-propiolactone (PL) with tetrahydrofuran (THF) and ϵ-caprolactone (CL) with THF. It is shown that, in the PL-THF system at [THF] 0 > [THF] e , the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc40e987ab1f6708e83030f1d8949471
https://doi.org/10.1016/0014-3057(81)90033-1
https://doi.org/10.1016/0014-3057(81)90033-1
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.. 17:3133-3140
The polymerization of glycolide in a melt containing SbF3 proceeds to 100% conversion in the temperature interval 160–175° and the number of active centres increases with time. The polymerization process features reactions of chain propagation and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd5aff9c243267752068ca5ec76fa1b6
https://doi.org/10.1016/0032-3950(75)90344-5
https://doi.org/10.1016/0032-3950(75)90344-5
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.. 18:1941-1951
Taking as an example the polymerization of β-propiolactone in the presence of hydroxylic compounds with initiators of different types, it is shown that the hydroxomechanism observed previously in polymerization of β-propiolactone by oxonium salts i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c342d041cf737dc2f76cd3e6dff7731
https://doi.org/10.1016/0032-3950(76)90375-0
https://doi.org/10.1016/0032-3950(76)90375-0
Publikováno v:
Polymer Science U.S.S.R.. 19:1005-1010
Kinetic and spectroscopic studies were made of polymerization of β-propiolactone by the action of Ph 3 C + SbCl 6 − in methylene chloride solution at 10–35°. Polymerization took place by the “lactone” mechanism previously established and is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a3dab2e3b3092b186f91bfe9536f16d
https://doi.org/10.1016/0032-3950(77)90258-1
https://doi.org/10.1016/0032-3950(77)90258-1
Publikováno v:
Polymer Science U.S.S.R.. 17:1644-1653
The cationic polymerization of β-propiolactone in the presence of water and alcohols is characterized by the occurrence of an induction period and by high reaction rates. The induction period is caused by reaction of the added water of alcohol with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7b0e9271adfeed0ef1ce3762dcc50b3
https://doi.org/10.1016/0032-3950(75)90166-5
https://doi.org/10.1016/0032-3950(75)90166-5