Patent ID: 11965061
Assignee: CHANGZHOU UNIVERSITY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 5:
6. A method for catalyzing the copolymerization of carbon dioxide, epoxy cyclohexane and ethylene oxide to prepare polycarbonate using the ternary composite catalyst of diethylzinc and yttrium trifluoroacetate loaded on chitin of claim 1, comprising:
adding the ternary composite catalyst of diethylzinc and yttrium trifluoroacetate loaded on chitin of claim 1, cyclohexane oxide, ethylene oxide and tetrahydrofuran into a dry 300-ml high-pressure reactor under nitrogen atmosphere;
introducing carbon dioxide and adjusting a pressure to 4 MPa; and
stirring at 80° C. for 9 hours at 1000 r/min to obtain polycarbonate.