DC pole | Wartość | Język |
dc.contributor.author | Grobelny, Zbigniew | - |
dc.contributor.author | Matlengiewicz, Marek | - |
dc.contributor.author | Jurek-Suliga, Justyna | - |
dc.contributor.author | Golba, Sylwia | - |
dc.contributor.author | Skrzeczyna, Kinga | - |
dc.date.accessioned | 2019-03-26T11:32:48Z | - |
dc.date.available | 2019-03-26T11:32:48Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Polymer Bulletin, Vol. 75 no. 3 (2018), s. 1101-1121 | pl_PL |
dc.identifier.issn | 0170-0839 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/8657 | - |
dc.description.abstract | Anionic polymerization of propylene oxide was carried out in the presence of two groups of potassium salts activated 18-crown-6 (18C6), e.g. alkoxide salts (CH3OK, i-PrOK, t-BuOK, CH3OCH2CH(CH3)OK, KCH2O) and other salts (CbK, Ph3CK, Ph2PK, Ph3HBK, KK, KH, and [(CH3)3Si]2NK) in THF at room temperature. Application of various initiating systems results in polyethers which are different in level and kind of unsaturation represented by allyloxy, cis- and trans-propenyloxy, as well as vinyloxy starting groups. In the presence of selected initiator, i.e. t-BuO-K? unsaturation increases markedly by addition of 18C6 or C222. During the initiation step oxirane ring-opening and direct deprotonation of the monomer occur simultaneously involving in some cases also the ligand. All initiators opens oxirane ring in the b-position except i-PrOK, which opens it in the
b- and a-position. The mechanisms of the reactions were discussed. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | anionic polymerization | pl_PL |
dc.subject | poly(propylene oxide | pl_PL |
dc.subject | ROP | pl_PL |
dc.subject | potassium salts | pl_PL |
dc.subject | unsaturation | pl_PL |
dc.subject | macrocyclic ligands | pl_PL |
dc.title | The influence of initiator and macrocyclic ligand on unsaturation and molar mass of poly(propylene oxide)s prepared with various anionic system | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.1007/s00289-017-2078-z | - |
Pojawia się w kolekcji: | Artykuły (WNŚiT)
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