Grignard-based anionic ring-opening polymerization of propylene oxide activated by triisobutylaluminum
CARLOTTI, Stéphane
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
CARLOTTI, Stéphane
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
< Leer menos
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Idioma
en
Article de revue
Este ítem está publicado en
European Polymer Journal. 2015, vol. 70, p. 240-246
Elsevier
Resumen en inglés
Better known as alkylating agents, Grignard reagents are investigated as deprotonating agents of an alcohol to generate magnesium alkoxides for the initiation and propagation of the anionic ring-opening polymerization of ...Leer más >
Better known as alkylating agents, Grignard reagents are investigated as deprotonating agents of an alcohol to generate magnesium alkoxides for the initiation and propagation of the anionic ring-opening polymerization of propylene oxide. By using an excess of triisobutylaluminum, this magnesium-aluminum system enables a full conversion polymerization in a few hours yielding controlled poly(propylene oxide) up to 10000 g/mol with relatively low dispersity. Characterizations by NMR and MALDI-ToF-mass spectrometry allowed the determination of the chain-ends and therefore the associated initiation mechanisms. This study revealed that propylene oxide can be polymerized in presence of a magnesium-based counter-ion. Concomitant initiations by alkoxide, halide and hydride are discussed.< Leer menos
Palabras clave en inglés
CROWN-ETHER
ETHYLENE-OXIDE
Magnesium counterion
POTASSIUM TERT-BUTOXIDE
Polyethers
Poly(propylene oxide)
Anionic ring-opening polymerization
Monomer activation
Deprotonation
Grignard reagent
BLOCK-COPOLYMERS
DIMETHYL SULFOXIDE
EPOXIDES
ACID
FUNCTIONALIZATION
BROMIDE
Orígen
Importado de HalCentros de investigación