KADOTA, Joji; PAVLOVIC, Drazen; DESVERGNE, Jean-Pierre; BIBAL, Brigitte; PERUCH, Frédéric; DEFFIEUX, Alain

doi:10.1021/ma101688d

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KADOTA, Joji
Laboratoire de Chimie des Polymères Organiques [LCPO]

PAVLOVIC, Drazen
Laboratoire de Chimie des Polymères Organiques [LCPO]

DESVERGNE, Jean-Pierre
Institut des Sciences Moléculaires [ISM]

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Macromolecules. 2010, vol. 43, n° 21, p. 8874-8879

American Chemical Society

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In this study, organocatalytic systems containing both basic and acidic sites, which can activate simultaneously the chain end and the monomer, were investigated in the ring-opening polymerization of L-lactide. To this end, equivalent amounts of (N,N-dimethylamino)pyridine (DMAP) and of its protonated form (DMAP center dot HX) were used as a dual catalytic system for L-lactide polymerization initiated by different alcohols. It is shown that the corresponding DMAP/DMAP center dot HX systems are significantly more active than DMAP alone, and yield well-controlled poly(L-lactide). Depending on the reaction conditions, the transesterification reaction can be prevented.< Réduire

Mots clés en anglais

ORGANIC CATALYSTS

LIVING POLYMERIZATION

OLEFIN POLYMERIZATION

RADICAL POLYMERIZATION

ZIEGLER CATALYSTS

CYCLIC ESTERS

DISCOVERY

GUANIDINE

MECHANISM

MONOMER

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Ring-Opening Polymerization of L-Lactide Catalyzed by an Organocatalytic System Combining Acidic and Basic Sites

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