OALib Journal期刊
Synthesisandstructuralstudiesofcopper(II)complexsupportedby-ONNO-tetradentateligand:Efficientcatalystforthering-openingpolymerizationoflactide
DOI: 10.1016/S1872-2067(14)60293-X
Keywords: Ring-openingpolymerization ,Lactide ,Coppercomplex ,Polylacticacid
Abstract:
？The-ONNO-tetradentateSchiffbaseligandN,N'-bis(2-hydroxy-3-methoxybenzaldehyde)benzene-1,2-diamine(HMBBD)hasbeensynthesized.Theligandwasattachedtocopper(Cu-HMBBD)inmethanolunderN2atmospheretogiveamononuclearcomplex.Thereactivityofthiscomplexinthering-openingpolymerization(ROP)oflactidehasbeenstudied.Thecomplexhasasquareplannergeometry,asdeterminedbyX-raydiffractionstudies.Thecoppercomplexishighlyactivetowardsthering-openingpolymerizationoflactide,andtherateofpolymerizationisheavilydependentontheinitiatorused.Thecoppercomplexallowscontrolledring-openingpolymerization,asshownbythelinearrelationshipbetweenthepercentageconversionandthenumberaveragemolecularweight.Basedontheliterature,amechanismfortheROPoflactidehasbeenproposed.
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