Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 54, Issue 13, Pages 1938-1944Publisher
WILEY
DOI: 10.1002/pola.28052
Keywords
carbon dioxide; catalysts; copolymerization; polycarbonates; semirigid ligands
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Funding
- National Natural Science Foundation of China [51373046, 51473045]
- Program of Study Abroad for Young Scholar - China Scholarship Council [2010670505]
- Natural Science Foundation of Hebei Province [B2014202013]
- High-level Excellent Talents in University of Hebei Province
- Changjiang Scholars and Innovative Research Team in University [IRT13060]
- New Century Excellent Talents in University [NCET-10-0125]
- Robert A. Welch Foundation [A-0923]
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Chromium complexes supported by tetradentate dianionic imine-thioether-bridged bis(phenol) ligands were prepared and employed in the synthesis of poly(cyclohexene carbonate) via the copolymerization of CO2 and cyclohexene oxide. The catalytic activity, product selectivity, and kinetic behaviors of these [ONSO]Cr-III complexes have been systematically investigated. Results indicate the presence of electron-withdrawing substituents on the ligands to enhance catalytic activity and polymer selectivity. A turnover frequency of 100 h(-1) is observed at a temperature of 110 degrees C, producing polycarbonate with >60% selectivity. (C) 2016 Wiley Periodicals, Inc.
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