dc.citation.endPage |
4147 |
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dc.citation.number |
15 |
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dc.citation.startPage |
4135 |
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dc.citation.title |
POLYMER |
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dc.citation.volume |
44 |
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dc.contributor.author |
Baek, Jong-Beom |
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dc.contributor.author |
Tan, LS |
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dc.date.accessioned |
2023-12-22T11:10:58Z |
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dc.date.available |
2023-12-22T11:10:58Z |
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dc.date.created |
2014-09-15 |
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dc.date.issued |
2003-07 |
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dc.description.abstract |
Based on the model-compound studies, the composition of polyphosphoric acid (PPA)/P2O5 mixture as an effective catalytic/dehydrative medium for the preparation of poly(ether-ketones) was optimized. Thus, with the optimal weight ratio of 4:1 (PPA: P2O5), the electrophilic substitution polycondensation of 3-phenoxybenzoic acid and related AB monomers was substantially promoted at 130 °C to yield the subject polymer abbreviated as mPEK and related poly(ether-ketones) with significantly higher molecular weights. In the cases where the polymerization systems were completely homogeneous, the ensuing polycondensation was rapid and yielded high molecular weight polymers (e.g. mPEK [η] = 2.10 dl/g) at 130 °C within 30 min., as compared to PPMA (phosphorus pentoxide/methanesulfonic acid) method which gave only moderate molecular weight polymers, e.g. mPEK ([η] = 0.64 dl/g). In some cases, where the monomers and PPA/P2O5 were not fully compatible, polycondensation did proceed and reasonable molecular weight range ([η] = 0.69-0.76 dl/g) could be achieved. However, the complete incompatibility between the poly(ether-sulfone) and PPA/P2O5 medium precluded the successful polymerization of 4-phenoxybenzenesulfonic acid. |
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dc.identifier.bibliographicCitation |
POLYMER, v.44, no.15, pp.4135 - 4147 |
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dc.identifier.doi |
10.1016/S0032-3861(03)00374-4 |
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dc.identifier.issn |
0032-3861 |
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dc.identifier.scopusid |
2-s2.0-0037932045 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/6081 |
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dc.identifier.url |
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0037932045 |
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dc.identifier.wosid |
000183846100009 |
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dc.language |
영어 |
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dc.publisher |
ELSEVIER SCI LTD |
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dc.title |
Improved syntheses of poly(oxy-1,3-phenylenecarbonyl-1,4-phenylene) and related poly(ether-ketones) using polyphosphoric acid/P2O5 as polymerization medium |
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dc.type |
Article |
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dc.description.journalRegisteredClass |
scopus |
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