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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Comparison of polycarbonate precursors synthesized from catalytic reactions of bisphenol-A with diphenyl carbonate, dimethyl carbonate, or carbon monoxide

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Title
Comparison of polycarbonate precursors synthesized from catalytic reactions of bisphenol-A with diphenyl carbonate, dimethyl carbonate, or carbon monoxide
Other Titles
Comparison of polycarbonate precursors synthesized from catalytic reactions of bisphenol-A with diphenyl carbonate, dimethyl carbonate, or carbon monoxide
Author
Kim, Won BaeLee, Jae Sung
Keywords
polycarbonate precursors; phosgene-free synthesis; bisphenol-A; diphenyl carbonate (DPC; dimethyl carbonate (DMC); carbon monoxide
Issue Date
2002-10
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF APPLIED POLYMER SCIENCE, v.86, no.4, pp.937 - 947
Abstract
Transesterification of bisphenol-A with diphenyl carbonate or dimethyl carbonate, and direct oxidative carbonylation of bisphenol-A were compared to obtain polycarbonate precursors for phosgene-free polycarbonate synthesis. The melt-transesterification of bisphenol-A and diphenyl carbonate occurred readily to produce reactive precursors without a significant equilibrium constraint. On the other hand, the transesterification of bisphenol-A and dimethyl carbonate showed a serious equilibrium limitation in obtaining reactive polycarbonate precursors leading to high molecular weight polymers, and coproduced a significant amount of methylated bisphenol-A. The direct oxidative carbonylation of bisphenol-A with CO produced diphenolic-ended oligomers and a significant amount of by-products, which are the least reactive in the subsequent polycondensation step of the phosgene-free polycarbonate process. A novel method to synthesize the reactive polycarbonate precursors was proposed that employed the coupled oxidative carbonylation of both bisphenol-A and phenol. (C) 2002 Wiley Periodicals, Inc
URI
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DOI
10.1002/app.11026
ISSN
0021-8995
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