Polymerization of ethylene oxide initiated by lithium derivatives via the monomer-activated approach Application to the direct synthesis of PS-b-PEO and PI-b-PEO diblock copolymers
DEFFIEUX, Alain
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Leer más >
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
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
Polymer. 2010, vol. 51, n° 24, p. 5674-5679
Elsevier
Resumen en inglés
The anionic polymerization of ethylene oxide (EO) initiated by lithium derivatives is extremely sluggish and only yields very low molar mass EO oligomers because of the low reactivity of lithium alkoxide species We show ...Leer más >
The anionic polymerization of ethylene oxide (EO) initiated by lithium derivatives is extremely sluggish and only yields very low molar mass EO oligomers because of the low reactivity of lithium alkoxide species We show here that using the monomer-activated anionic polymerization approach one can activate the C-O-Li bonds towards EO polymerization at low temperature and in non polar media Starting from living polystyryllithium and polyisoprenyllithium addition of triisobutylaluminum (i-Bu(3)Al) in excess to lithium species triggers the propagation reaction of EO allowing the direct synthesis in a few hours of poly(styrene-b-ethylene oxide) and poly(isoprene-b-ethylene oxide) diblock copolymers with a molar mass of the PEO block up to 10 000 g/mol< Leer menos
Palabras clave en inglés
Poly(styrene b ethylene oxide)
Anionic polymerization
Monomer activation
Orígen
Importado de HalCentros de investigación