Metallocenes ring-opening polymerization

Ring-opening polymerization of strained metallocenophanes, mainly ferroceno-phanes with Si atom at the bridge, to give high-molecular-weight poly-(metallocenes) 99PAC1471. 

The synthetic procedure of PE-fo-PCL using hydroxyl terminated polyethylene was reported [39]. Terminally hydroxylated polyethylene was prepared during a metallocene-catalyzed polymerization using controlled chain transfer reaction with alkylaluminum compounds. PE-fo-PCL block copolymer was synthesized from terminally hydroxylated PE and e-caprolactone (e-CL) using Sn(Oct)2 as a catalyst for ring opening polymerization. 

Coordination Polymerization of 1,3-Dienes Single-Site (or Metallocene) Catalysts Living Radical Polymerizations Other Types of Polymerizations, Polymers Ring-Opening Polymerization... 

A series of lanthanide metallocene catalysts are active in the regioselective ring-opening polymerization of strained f .vo-rnethylcnecycloalkanes to yield f . v>-mcthylene-functionalizcd polyethylenes.9 a Methylenecyclobutane affords the polymer [-CH2CH2C112C( =CH2)-] under the catalytic action of [ 1,2-... 

Marks reported ring-opening polymerization of methylenecyclopropane and methylenecyclobutane promoted by metallocenes of Zr and Lu. Cationic zirconocene complex initiates ring-opening polymerization of methylenecyclobutane to give a polymer having the =CH2 substituent on every fourth carbon of the polyethylene chain (Eq. 40) [154, 155]. Polymerization... 

I. Manners, Ring-opening polymerization of strained metallocenophanes a new route to high molecular weight poly(metallocenes), Pure Appl. Chem., 71, 1471-1476 (1999). 

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