Reference : Synthesis of well-defined poly(alkyl methacrylate)-graft-polylactone by sequential li...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/14837
Synthesis of well-defined poly(alkyl methacrylate)-graft-polylactone by sequential living polymerization
English
Mecerreyes, David [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Dubois, Philippe [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Hedrick, James L [IBM Almaden Research Center, San Jose, USA > > > >]
Jan-1999
Macromolecular Chemistry and Physics
Wiley-V C H Verlag Gmbh
200
1
156-165
Yes (verified by ORBi)
International
1022-1352
Weinheim
[en] anionic polymerization ; ring-opening polymerization (ROP) ; lactone ; graft polymer
[en] A novel combination of living polymerization reactions has been proposed for the controlled synthesis of poly(alkyl methacrylate)-graft-polylactones. This strategy relies upon the sequential living polymerization of alkyl methacrylates and aliphatic lactones, with an intermediate chemical transformation for shifting from the first mechanism to the second one. In the first step, an alkyl methacrylate (methyl and butyl) is copolymerized with 2-trimethylsiloxyethyl methacrylate (TMSEMA). This living anionic polymerization is initiated with diphenylhexyllithium( DPHLi) in the presence of a μ-ligand, lithium chloride, in THF at - 78 °C. The trimethylsiloxy groups are then hydrolyzed with release of hydroxyl groups which are reacted with triethylaluminum in order to form a multifunctional macroinitiator of the Al alkoxide type. The second step consists of the ring opening polymerization (ROP) of aliphatic lactones (ε-caprolactone, J-valerolactone and 1,4,8-trioxaspiro[4.6]-9-undecanone (TOSUO)) with the formation of novel graft copolymers. As a result of the livingness of both the anionic and the ROP polymerization steps, the molecular weight of both the main backbone and the grafts is predictable, the apparent polydispersity is narrow ( from 1.05 to 1.30) and the grafting density can be controlled being dependent on the distribution of the hydroxyl groups within the precursor backbone.
Center for Education and Research on Macromolecules (CERM)
The "Govierno Vasco" ; IBM Belgium ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers
http://hdl.handle.net/2268/14837
10.1002/(SICI)1521-3935(19990101)200:1<156::AID-MACP156>3.0.CO;2-C
http://www3.interscience.wiley.com/cgi-bin/fulltext/40003450/PDFSTART

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