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Fe/Zn double metal cyanide catalyzed ring-opening polymerization of propylene oxide: 2. Characterization of active structure of double metal cyanide catalysts

✍ Scribed by Su Chen; Li Chen


Publisher
Springer
Year
2003
Weight
365 KB
Volume
282
Category
Article
ISSN
0340-255X

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Polymerizations of propylene oxide (PO) have been carried out by using a series of multi-metal metal cyanide (MMC) catalysts prepared by reacting ZnCl 2 and K 3 [Co(CN) 6 ] 2 , K 4 Fe(CN) 6 , K 3 Fe(CN) 6 and/or K 2 Ni(CN) 4 in the presence of tert-butyl alcohol and polytetramethylene ether glycol a

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## Abstract Highly active CaCl~2~‐modified Zn‐Co(III) DMCs were prepared. XRD results showed that the modified catalyst Ca‐DMC containing 0.14 wt.‐% CaCl~2~ was amorphous. A higher polymer yield (>61 kg polymer/g catalyst) and a shorter induction period for ROP of PO were observed for Ca‐DMC than f