Ring-opening polymerization of lactones using supramolecular organocatalysts under simple conditions
THOMAS, Coralie
Institut des Sciences Moléculaires [ISM]
Laboratoire de Chimie des Polymères Organiques [LCPO]
Institut des Sciences Moléculaires [ISM]
Laboratoire de Chimie des Polymères Organiques [LCPO]
PERUCH, Frédéric
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
THOMAS, Coralie
Institut des Sciences Moléculaires [ISM]
Laboratoire de Chimie des Polymères Organiques [LCPO]
Institut des Sciences Moléculaires [ISM]
Laboratoire de Chimie des Polymères Organiques [LCPO]
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
RSC Advances. 2012, vol. 2, n° 33, p. 12851-12856
Royal Society of Chemistry
Résumé en anglais
Ring-opening polymerizations of delta-valerolactone (delta-VL) and epsilon-caprolactone (epsilon-CL) were catalyzed by a metal-free system composed of two H-bonding components, a phenol derivative to activate the monomer, ...Lire la suite >
Ring-opening polymerizations of delta-valerolactone (delta-VL) and epsilon-caprolactone (epsilon-CL) were catalyzed by a metal-free system composed of two H-bonding components, a phenol derivative to activate the monomer, and DBU, which enhanced the nucleophilicity of the initiator and the propagating chain. Compared to other H-bonding systems for the ROP of lactones, phenol + DBU catalysts had the practical advantages of being commercially available and inexpensive, efficient at room temperature and under simple experimental conditions that avoid drying of reactants and the use of a glove-box. In addition, the obtained polyesters had a narrow dispersion of molar masses which were controlled by the concentration ratio of monomer versus initiator. Moreover, the initiation of the polymerization by DBU and residual water molecules (despite no specific drying of reagents) was shown to be very minor under the experimental conditions. No initiation by the phenol catalysts was observed. Block copolyesters PVL-PLA and PCL-PLA were also prepared using these conditions.< Réduire
Mots clés en anglais
LACTIDE POLYMERIZATION
CATALYSTS
PHENOLS
Origine
Importé de halUnités de recherche