[en] Molecular weight ; Polydispersity (atom transfer radical polymn. of Me methacrylate catalyzed by homo- and heterobimetallic ruthenium complexes) ; Polymerization catalysts ; Polymerization kinetics (atom transfer, radical ; atom transfer radical polymn. of Me methacrylate catalyzed by homo- and heterobimetallic ruthenium complexes) ; methyl methacrylate atom transfer radical polymn ruthenium catalyst
[en] The atom transfer radical polymn. of Me methacrylate was studied in the presence of 6 novel homo- and heterobimetallic Ru complexes: (p-cymene)RuCl2/(PCy3)(ethylene)RuCl2, (p-cymene)RuCl2/(1,3-Mes2-4,5-X2-imidazolin-2-ylidene)(ethylene)RuCl2 (X = H or Cl, Mes = 2,4,6-trimethylphenyl), and (p-cymene)RuCl2/[(2-dicyclohexylphosphinoethyl)cyclopentadienyl](Cp)TiX2 (X = F, Cl, or OBz). Et 2-bromoisobutyrate was used as initiator in all expts. All catalysts showed high efficiency in controlled synthesis of poly(Me methacrylate). Using the ruthenium/titanocene dibenzoate complex, the polymn. stopped after a few hours of reaction, affording nevertheless a polymer with a decent polydispersity.
[Université de Liège - ULg > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique >]
