Synthesis of carboxy- and chloro-terminated poly(propylene)s using Zn(C2H5)2 as chain transfer reagent

Propene was polymerized with conventional and Solvay-type TiCl₃ combined with Al(C₂H₅)₂Cl using Zn(C₂H₅)₂ as a chain transfer reagent. The produced terminal Zn-carbon bonds of the polymer were reacted with carbon dioxide and chlorine in the presence of N-methylimidazole followed by hydrolysis to obtain terminally carboxylated and chlorinated poly(propylene) in approximately 50% yield.