Comparison of polycarbonate precursors synthesized from catalytic reactions of bisphenol-A with diphenyl carbonate, dimethyl carbonate, or carbon monoxide
SCIE
SCOPUS
- Title
- Comparison of polycarbonate precursors synthesized from catalytic reactions of bisphenol-A with diphenyl carbonate, dimethyl carbonate, or carbon monoxide
- Authors
- Kim, WB; Lee, JS
- Date Issued
- 2002-10-24
- Publisher
- JOHN WILEY & SONS INC
- 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.
- Keywords
- polycarbonate precursors; phosgene-free synthesis; bisphenol-A; diphenyl carbonate (DPC; dimethyl carbonate (DMC); carbon monoxide; GAS-PHASE TRANSESTERIFICATION; OXIDATIVE CARBONYLATION; INTERCHANGE REACTION; MELT TRANSESTERIFICATION; END-GROUPS; PHENOL; DIMETHYLCARBONATE; POLYMERIZATION; OLIGOMERS; COMPLEX
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18931
- DOI
- 10.1002/APP.11026
- ISSN
- 0021-8995
- Article Type
- Article
- Citation
- JOURNAL OF APPLIED POLYMER SCIENCE, vol. 86, no. 4, page. 937 - 947, 2002-10-24
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