ring-opening polymerization (ROP); lactone; green technology; supercritical carbon dioxide
Abstract :
[en] Ring-opening polymerization (ROP) of (L,L)-lactide (LA) has been initiated by dibutyltin dimethoxide in supercritical carbon dioxide (SC CO2). Polymerization is controlled and proceeds at quasi the same rate as in toluene, which indicates that the reactivity of the propagating species is not impaired by parasitic carbonation reaction. Random copolymerization of LA with P-caprolactone (CL) has also been studied in sc CO2, and the reactivity ratios have been determined as 5.8 +/- 0.5 for LA and 0.7 +/- 0.25 for CL. These values have to be compared to 0.7 +/- 0.25 for LA and 0.15 +/- 0.05 for CL in toluene. Good control on ROP of CL and LA in SC CO2 has been confirmed by the successful synthesis of diblock copolymers by sequential polymerization of CL and LA.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Stassin, Fabrice; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Polymerization of (L,L)-lactide and copolymerization with epsilon-caprolactone initiated by dibutyltin dimethoxide in supercritical carbon dioxide
Publication date :
01 July 2005
Journal title :
Journal of Polymer Science. Part A, Polymer Chemistry
TECMAVER Program; Brite Euram Project BE 97-4520 BRPR-CT97-0503
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] EU - European Commission Région wallonne [BE]
