Reference : New catalysis for fast bulk ring-opening polymerization of lactide monomers
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/4397
New catalysis for fast bulk ring-opening polymerization of lactide monomers
English
Degée, Philippe [University of Mons-Hainaut (UMH) > > Laboratory of Polymeric and Composite Materials > >]
Dubois, Philippe [University of Mons-Hainaut (UMH) > > Laboratory of Polymeric and Composite Materials > > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jacobsen, Sven [University of Stuttgart > > Institut für Kunststofftechnologie > >]
Fritz, Hans-Gerhard [University of Stuttgart > > Institut für Kunststofftechnologie > >]
Oct-1999
Macromolecular Symposia
Wiley-V C H Verlag Gmbh
144
289-302
Yes (verified by ORBi)
International
1022-1360
1521-3900
Weinheim
[en] ring-opening polymerization (ROP) ; lactone
[en] The ring-opening polymerization of lactides has been studied in bulk using either 2-ethylhexanoic acid tin(II) salt, Sn(Oct)2, or aluminum triisopropoxide, Al(OiPr)3, as the initiator over a wide range of temperature and monomer-to-initiator molar ratio, A high increase in the bulk polymerization rate has been observed when the initiator was added with an equimolar amount of a Lewis base, such as triphenylphosphine and 4-picoline (C6H7N) added to Sn(Oct)2 and Al(OiPr)3, respectively Melt stable polylactides of high molecular weight and reasonably narrow molecular weight distribution have been accordingly prepared. The use of the Sn(Oct)2. equimolar combination has allowed for reaching an acceptable balance between propagation and depolymerization rates, so that the polymerization is fast enough to be performed through a continuous single-stage process in a twin-screw extruder A global activation mechanism is proposed and discussed by comparison with both investigated initiation systems.
Center for Education and Research on Macromolecules (CERM)
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Commission européenne
Researchers
http://hdl.handle.net/2268/4397

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