Zn-Ni double metal cyanide complex: A novel effective catalyst for copolymerization of propylene oxide and carbon dioxide
(1.College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China2.湖南省湘西土家族苗族自治州吉首市吉首大学化学化工学院3.State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China4.Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: A novel double metal cyanide complex (DMC) based on Zn[Ni(CN)4] was prepared using K2[Ni(CN)4] and ZnCl2, and employed as catalyst for the copolymerization of carbon dioxide and propylene oxide (PO). The resulting copolymers were characterized by IR, 1HNMR. The results show that this catalyst exhibits catalytic efficiency at approximate 500 g copolymer per gram of Zn[Ni(CN)4] under proper conditions. The mole fraction of CO2 for copolymer can reach about 0.3. Propylene carbonate is also produced as by-product, but its content is as low as 4%？6% of overall products under suitable conditions.
Key words: carbon dioxide; propylene oxide; catalyst; nickel