title: Titanium pyridonates for the homo- and copolymerization of rac-lactide and ε-caprolactone.
abstract: A series of titanium pyridonate complexes have been synthesized under very mild reaction conditions from a common precursor, Ti(NMe2)4. These complexes have been explored as initiators for the ring-opening polymerization of rac-lactide and ε-caprolactone and have proven to be competitive with leading titanium initiators. Furthermore, these complexes have been shown to be competent initiators for the synthesis of copolymers (CL-LA block copolymers and random copolymers). Metal complex reactivity trends in both homo- and copolymerization show that poly(lactic acid) is most susceptible to chain scission and transesterification.
authors.affiliation: Department of Chemistry, University of British Columbia, Vancouver, Canada. schaferl@mail.ubc.ca.
authors.forename: Damon J
authors.initials: DJ
authors.lastname: Gilmour
authors.forename: Ruth L
authors.initials: RL
authors.lastname: Webster
authors.forename: Mitchell R
authors.initials: MR
authors.lastname: Perry
authors.forename: Laurel L
authors.initials: LL
authors.lastname: Schafer
mesh_terms: D002208:Caproates / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D004146:Dioxanes / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure; D058105:Polymerization; D011728:Pyridones / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*
chemical_list: D002208:Caproates; D056831:Coordination Complexes; D004146:Dioxanes; D007783:Lactones; D008024:Ligands; D011728:Pyridones; C121056:caprolactone; C091880:dilactide; D014025:Titanium