Cationic polymerization of isoprene initiated by 2-cyclohexylidene ethanol-B(C6F5)(3): an insight into initiation and branching reactions
DEFFIEUX, Alain
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
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Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
DEFFIEUX, Alain
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
PERUCH, Frédéric
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
< Réduire
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Langue
en
Article de revue
Ce document a été publié dans
Polymer Chemistry. 2013, vol. 4, n° 2, p. 407-413
Royal Society of Chemistry - RSC
Résumé en anglais
In this paper, the cationic polymerization of isoprene using 2-cyclohexylidene ethanol-B(C6F5)(3) as the initiating system is investigated under various polymerization conditions. The use of this allylic alcohol allows ...Lire la suite >
In this paper, the cationic polymerization of isoprene using 2-cyclohexylidene ethanol-B(C6F5)(3) as the initiating system is investigated under various polymerization conditions. The use of this allylic alcohol allows studying the initiation as well as the mechanism of branching reactions. Intensive beta-H elimination, which is the major termination process, is responsible for protic initiation and double bond loss via protonation. This latter process leads to chain branching and intramolecular cyclization, even at low conversion. Independently of the condition used (solvent polarity, temperature, presence of a proton trap, etc.) only oligomers are obtained, composed of saturated sequences and IP units almost exclusively with a 1,4-trans configuration and an olefinic terminal group.< Réduire
Mots clés en italien
NATURAL-RUBBER
CARBOCATIONIC POLYMERIZATION
Origine
Importé de halUnités de recherche