Abstract

2,2′-Methylenebis(6-tert-butyl-4-methylphenolate) titaniumdichloride (1 a) brought about the living polymerization of 1,3-dioxepan-2-one (7CC) to give polymers with narrow molecular weight distributions. The molecular weight of the obtained polycarbonate could be controlled by changing the initial mole ratio of 7CC and 1 a. The polycarbonate thus formed has hydroxymethylene terminal units at both ends.

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