The present disclosure relates to cationic divalent metal catalysts useful for the polymerization of cyclic esters, methods for their preparation and uses thereof.
本公开涉及用于环酯聚合的阳离子二价金属催化剂,其制备方法及用途。
US8193112B2
申请人:——
公开号:US8193112B2
公开(公告)日:2012-06-05
Cationic zinc complexes: a new class of catalyst for living lactide polymerization at ambient temperature
作者:Craig A. Wheaton、Paul G. Hayes
DOI:10.1039/c0cc03463k
日期:——
Cationic zinc complexes of a bis(phosphinimine) pincer ligand have been prepared. Methylzinc and zinc–lactate complexes have been structurally characterized, and the latter is the first cationic metal complex to promote coordination–insertion polymerization of lactide at ambient temperature. This novel catalyst system is remarkably active and also exhibits living character. A detailed investigation of the kinetics and mechanism of the polymerization process has been undertaken.