| abstract |
In one aspect, the present disclosure includes a polymerization system for the copolymerization of CO 2 with an epoxide comprising: 1) a catalyst comprising a set of permanent ligands and a metal coordination compound having at least one ligand that is a polymerization initiator , And 2) a chain transfer agent having at least one site capable of initiating copolymerization of an epoxide and CO 2 , wherein the chain transfer agent contains at least one blocked hydroxyl group. In a second aspect, the present disclosure includes a method of synthesizing a polycarbonate polyol using the polymerization system of the present invention. In a third aspect, the present disclosure comprises a polycarbonate polyol composition, wherein the polymer chain has a high percentage of -OH end groups, a high percentage of carbonate linkages, and substantially all of the polycarbonate chains having hydroxyl end groups are It is characterized in that it does not have an embedded chain transfer agent. |