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- W2095291090 abstract "Abstract A novel double‐metal cyanide complex based on Zn[Ni(CN) 4 ] was prepared and used as a catalyst for the copolymerizations of carbon dioxide and propylene oxide (PO) and carbon dioxide and cyclohexene oxide (CHO). The copolymers were characterized by IR and 1 H‐NMR, and the effects of temperature, pressure, solvent, and preparative methods for the catalysts on catalytic activity and composition of the copolymer were investigated. The results show that this novel catalyst exhibited its highest catalytic efficiency at about 500 g/g of Zn[Ni(CN) 4 ] for PO and CO 2 , whereas the catalytic efficiency for CHO and CO 2 was merely between 5.6 and 22.5 g/g of Zn[Ni(CN) 4 ]. The molar fraction of carbonate linkages for PO–CO 2 and CHO–CO 2 copolymers reached about 0.6 and 0.3, respectively. The results show that a lower temperature and a higher CO 2 pressure were favorable for the incorporation of CO 2 into the copolymer, and the nonpolar solvents were better media for copolymerization. As a complexing agent, glycol ether exhibited better promoting effects on catalytic efficiency among those investigated, but the catalysts prepared by different complexing agents showed no significant differences in the compositions of the copolymers. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008" @default.
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- W2095291090 date "2007-12-10" @default.
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- W2095291090 title "Copolymerization of carbon dioxide and epoxides with a novel effective Zn–Ni double-metal cyanide complex" @default.
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- W2095291090 doi "https://doi.org/10.1002/app.25064" @default.
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