Indexed by:
期刊论文
First Author:
Ren, Wei-Min
Correspondence Author:
Lu, XB (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.
Co-author:
Liu, Ye,Wu, Guang-Peng,Liu, Jie,Lu, Xiao-Bing
Date of Publication:
2011-11-15
Journal:
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Included Journals:
Scopus、SCIE、EI
Document Type:
J
Volume:
49
Issue:
22
Page Number:
4894-4901
ISSN No.:
0887-624X
Key Words:
carbon dioxide; catalysis; cobalt; copolymerization; epoxide; isotactic;
polymerization catalysis; regioselective ring opening; ring-opening
polymerization; stereochemistry control
Abstract:
Completely stereoregular polycarbonate synthesis was achieved with the use of unsymmetric multichiral cobalt-based complexes bearing a derived chiral BINOL and an appended 1,5,7-triabicyclo[4.4.0] dec-5-ene as catalyst for the copolymerization of CO2 and aliphatic terminal epoxides at mild conditions. The (S,S,S)-Co(III) complex 1c with sterically hindered substituent group is more stereoregular catalyst for the copolymerization of CO2 and racemic propylene oxide to afford a perfectly regioregular poly(propylene carbonate) (PPC), with >99% head-to-tail linkages, >99% carbonate link-ages, and a K-rel of 24.4 for the enchainment of (R)-epoxide over (S)-epoxide. The isotactic PPC exhibits an enhanced glass transition temperature of 47 degrees C, which is 10-12 degrees C higher than that of the corresponding irregular polycarbonate. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 4894-4901, 2011
Translation or Not:
no
