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Activation mechanisms of trialkylaluminum in alkali metal alkoxides or tetraalkylammonium salts/propylene oxide controlled anionic polymerization

dc.rights.licenseopen
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
hal.structure.identifierTeam 1 LCPO : Polymerization Catalyses & Engineering
dc.contributor.authorCARLOTTI, Stéphane
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
dc.contributor.authorBILLOUARD, Cyrille
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
dc.contributor.authorGAUTRIAUD, Emilie
hal.structure.identifierPolymer Laboratory [BASF]
dc.contributor.authorDESBOIS, Philippe
hal.structure.identifierLaboratoire de Chimie des polymères organiques [LCPO]
dc.contributor.authorDEFFIEUX, Alain
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2005
dc.identifier.issn1022-1360
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/20681
dc.description.abstractEnThe anionic polymerization of propylene oxide (PO) initiated by alkali metal alkoxides is in non polar solvents a very slow and non controlled reaction process. Transfer reaction to monomer is predominant, allowing only the preparation of low molar masses PPO. The influence of the addition of trialkylaluminium to either an alkali metal alkoxide or a tetraalkylammonium salt used as initiator for PO polymerization in hydrocarbon media was investigated. A strong enhancement of the polymerization rate accompanied by a drastic decrease of the transfer reactions is observed, allowing the synthesis of PPO with well controlled molar masses. At constant monomer and alkali metal alkoxide concentrations, the polymerization rate increases with increasing trialkylaluminium concentration. Results indicate that the trialkylaluminium derivative is involved in the formation of two distinct complexes, one with the alkali metal alkoxide or the tetraalkylammonium salt and another one with the PO monomer which is strongly activated towards nucleophilic active species. Significant differences between the alkali metal and tetraalkylammonium based initiators are observed. In particular much less trialkylaluminum activator is needed with the ammonium salt to get the same rate of propagation and controlled polymerization.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.entrialkylaluminum
dc.subject.enmonomer activation
dc.subject.enpolyethers
dc.subject.enpropylene oxide
dc.subject.enanionic polymerization
dc.title.enActivation mechanisms of trialkylaluminum in alkali metal alkoxides or tetraalkylammonium salts/propylene oxide controlled anionic polymerization
dc.typeArticle de revue
dc.identifier.doi10.1002/masy.200550806
dc.subject.halChimie/Polymères
bordeaux.journalMacromolecular Symposia
bordeaux.page61-68
bordeaux.volume226
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-00394176
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00394176v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Macromolecular%20Symposia&rft.date=2005&rft.volume=226&rft.spage=61-68&rft.epage=61-68&rft.eissn=1022-1360&rft.issn=1022-1360&rft.au=CARLOTTI,%20St%C3%A9phane&BILLOUARD,%20Cyrille&GAUTRIAUD,%20Emilie&DESBOIS,%20Philippe&DEFFIEUX,%20Alain&rft.genre=article


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