[EN] ALUMINUM SALEN AND SALAN CATALYSTS FOR RING-OPENING POLYMERISATION OF CYCLIC ESTERS<br/>[FR] CATALYSEURS ALUMINIUM-SALEN ET ALUMINIUM-SALAN POUR POLYMÉRISATION PAR OUVERTURE DE CYCLE D'ESTERS CYCLIQUES
申请人:UNIV EDINBURGH
公开号:WO2013128175A1
公开(公告)日:2013-09-06
The present application includes new aluminum salen and salan catalysts for the living and/or immortal ring-opening polymerization of suitable cyclic ester monomers such as lactide, β-butyrolactone and ε-caprolactone. The present application also includes processes comprising the ROP of a suitable cyclic ester monomer, optionally in combination with one or more suitable cyclic ester comonomers in the presence of said new aluminum salen and salan catalysts. The present application further includes processes comprising the ROP of β-butyrolactone, optionally in combination with one or more suitable cyclic ester comonomers, in the presence of an aluminum salen or salan catalyst, to form poly(3-hydroxybutyrate) homopolymers and copolymers comprising 3-hydroxybutyrate monomeric units, respectively.
Aluminum salen and salan complexes in the ring-opening polymerization of cyclic esters: Controlled immortal and copolymerization of<i>rac</i>-β-butyrolactone and<i>rac</i>-lactide
作者:Edward D. Cross、Laura E. N. Allan、Andreas Decken、Michael P. Shaver
DOI:10.1002/pola.26476
日期:2013.3.1
Aluminum‐based salen and salancomplexes mediate the ring‐opening polymerization (ROP) of rac‐β‐butyrolactone (β‐BL), rac‐lactide, and ε‐caprolactone. Al‐salen and Al‐salancomplexes exhibit excellent control over the ROP of rac‐β‐butyrolactone, yielding atactic poly(3‐hydroxybutyrate) (PHB) with narrow PDIs of <1.15 for Al‐salen and <1.05 for Al‐salan. Kinetic studies reveal pseudo‐first‐order polymerization