Premium
Double metal cyanide complexes synthesized by solvent‐free grinding method for copolymerization of CO 2 and propylene oxide
Author(s) -
Zhang Wuyuan,
Lin Qiang,
Cheng Yi,
Lu Lingbin,
Lin Bo,
Pan Lisha,
Xu Nai
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34544
Subject(s) - propylene carbonate , propylene oxide , crystallinity , catalysis , cyanide , materials science , polymer chemistry , metal , solvent , copolymer , inorganic chemistry , chemistry , organic chemistry , polymer , ethylene oxide , electrode , composite material , electrochemistry
Two active double metal cyanide (DMC) complexes were successfully synthesized by solvent‐free grinding method. Their structures were characterized by FTIR spectrometer and X‐ray diffractometer. The results showed that Complex 1 (double metal cyanide complex with K 3 Fe(CN) 6 and ZnCl 2 ) and Complex 2 (double metal cyanide complex with K 3 Fe(CN) 6 and Zn(CH 3 COO) 2 ) had the same structures, crystal forms, and lower crystallinity as both of them synthesized by conventional solvent‐based methods, respectively. Investigations on grinding conditions indicated that Complex 1 ground 14 min at a high grinding strength could achieve low crystallinity and showed substantially amorphous structures. Two speculated structures of DMC were given. The alternating copolymerization of CO 2 and propylene oxide with Complex 1 as catalyst obtained anticipated poly(propylene carbonate) (PPC) with very high catalytic activity. The PPC produced by optimized Complex 1 has molecular weight ( M n ) up to 98,000 and narrow polydispersity of 1.93 with more than 90% carbonate linkages. Compared with Complex 1 , Complex 2 displayed low catalytic activity but high selectivity mainly due to the electron atmosphere and strong steric hindrance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011