Catalytic Chain Transfer Copolymerization of Propylene Oxide and CO₂ using Zinc Glutarate Catalyst.

ABSTRACT: Oligo and poly(propylene ether carbonate)-polyols with molecular weights from 0.8 to over 50 kg/mol and with 60-92 mol % carbonate linkages were synthesized by chain transfer copolymerization of carbon dioxide (CO₂) and propylene oxide (PO) mediated by zinc glutarate. Online-monitoring of the polymerization revealed that the CTA controlled copolymerization has an induction time which is resulting from reversible catalyst deactivation by the CTA. Latter is neutralized after the first monomer additions. The outcome of the chain transfer reaction is a function of the carbonate content, i. e. CO₂ pressure, most likely on account of differences in mobility (diffusion) of the various polymers. Melt viscosities of poly(ether carbonate)diols with a carbonate con

SUBMITTER: Marbach J 

PROVIDER: S-EPMC6604238 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature