DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, Hyun Gyu | ko |
dc.contributor.author | Chang, Ho Nam | ko |
dc.contributor.author | Dordick, JS | ko |
dc.date.accessioned | 2010-11-23T01:03:33Z | - |
dc.date.available | 2010-11-23T01:03:33Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2001-03 | - |
dc.identifier.citation | BIOTECHNOLOGY AND BIOENGINEERING, v.72, no.5, pp.541 - 547 | - |
dc.identifier.issn | 0006-3592 | - |
dc.identifier.uri | http://hdl.handle.net/10203/20244 | - |
dc.description.abstract | A chemoenzymatic approach was developed to prepare sucrose-containing aromatic polymers. The protease from Bacillus licheniformis catalyzed the transesterification of sucrose with a diester of terephthalic acid in pyridine to give the mono- and diester products. At 45 degreesC, >70% of sucrose was consumed after 1 day and sucrose diester began to form after 6 days when >95% of sucrose had been converted to sucrose monoester. The final yield of sucrose diester after 20 days was 13.8%. The sucrose monoester was identified as sucrose 1'-terephthalate and the diester products consisted of sucrose 6,1'-diterephthalate and sucrose 6',1'-diterephthalate in a ratio of 2:1. The sucrose diester products were polymerized with ethylene-glycol and ethylene-diamine to give poly(ethylene-terephthalate) and poly(ethylene-terephthalamide), with sucrose contained in the polymer backbone. The polycondensation reactions were carried out in dimethylsulfoxide (DMSO) at 70 degreesC using zinc acetate as a catalyst. The sucrose-containing polyester and polyamide were obtained at 65% yield for 24 h and at 73% yield for 12 h, respectively. End-group analysis of the polymers by C-13-NMR or H-1-NMR in DMSO provided a number average molecular weight of 3200 and 4300 Da, respectively. Structural analyses of the polymers were performed with H-1-NMR, 13C-NMR, and FTIR. On the basis of 13C-NMR, acylation of the C1', C6, and C6' hydroxyls were maintained in the polymer backbones. (C) 2001 John Wiley & Sons, Inc. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | JOHN WILEY SONS INC | - |
dc.subject | ORGANIC-SOLVENTS | - |
dc.subject | ENZYMATIC-SYNTHESIS | - |
dc.subject | ESTERS | - |
dc.title | Chemoenzymatic synthesis of sucrose-containing aromatic polymers | - |
dc.type | Article | - |
dc.identifier.wosid | 000167089400005 | - |
dc.identifier.scopusid | 2-s2.0-0035809809 | - |
dc.type.rims | ART | - |
dc.citation.volume | 72 | - |
dc.citation.issue | 5 | - |
dc.citation.beginningpage | 541 | - |
dc.citation.endingpage | 547 | - |
dc.citation.publicationname | BIOTECHNOLOGY AND BIOENGINEERING | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Park, Hyun Gyu | - |
dc.contributor.localauthor | Chang, Ho Nam | - |
dc.contributor.nonIdAuthor | Dordick, JS | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | protease | - |
dc.subject.keywordAuthor | chemoenzymatic synthesis | - |
dc.subject.keywordAuthor | transesterification | - |
dc.subject.keywordAuthor | sucrose | - |
dc.subject.keywordAuthor | aromatic polymers | - |
dc.subject.keywordPlus | ORGANIC-SOLVENTS | - |
dc.subject.keywordPlus | ENZYMATIC-SYNTHESIS | - |
dc.subject.keywordPlus | ESTERS | - |
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