Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 남원우 | * |
dc.date.accessioned | 2017-01-05T02:01:17Z | - |
dc.date.available | 2017-01-05T02:01:17Z | - |
dc.date.issued | 2003 | * |
dc.identifier.issn | 0002-7863 | * |
dc.identifier.other | OAK-1616 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/233702 | - |
dc.description.abstract | We report the preparation, structural characterization, and detailed lactide polymerization behavior of a new ZN(II) alkoxide complex, (L 1ZnOEt) 2 (L 1 = 2,4-di-tert-butyl-6-{[(2′ -dimethylaminoethyl)methylamino]-methyl}phenolate). While an X-ray crystal structure revealed the complex to be dimeric in the solid state, nuclear magnetic resonance and mass spectrometric analyses showed that the monomeric form L 1ZnOEt predominates in solution. The polymerization of lactide using this complex proceeded with good molecular weight control and gave relatively narrow molecular weight distribution polylactide, even at catalyst loadings of <0.1% that yielded M n as high as 130 kg mol -1. The effect of impurities on the molecular weight of the product polymers was accounted for using a simple model. Detailed kinetic studies of the polymerization reaction enabled integral and nonintegral orders in L 1ZnOEt to be distinguished and the empirical rate law to be elucidated, -d[LA]/dt = K p[L 1ZnOEt][LA]. These studies also showed that L 1ZnOEt polymerizes lactide at a rate faster than any other Zn-containing system reported previously. This work provides important mechanistic information pertaining to the polymerization of lactide and other cyclic esters by discrete metal alkoxide complexes. | * |
dc.language | English | * |
dc.title | A highly active zinc catalyst for the controlled polymerization of lactide | * |
dc.type | Article | * |
dc.relation.issue | 37 | * |
dc.relation.volume | 125 | * |
dc.relation.index | SCI | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 11350 | * |
dc.relation.lastpage | 11359 | * |
dc.relation.journaltitle | Journal of the American Chemical Society | * |
dc.identifier.doi | 10.1021/ja0359512 | * |
dc.identifier.wosid | WOS:000185341800057 | * |
dc.identifier.scopusid | 2-s2.0-0042693126 | * |
dc.author.google | Williams C.K. | * |
dc.author.google | Breyfogle L.E. | * |
dc.author.google | Choi S.K. | * |
dc.author.google | Nam W. | * |
dc.author.google | Young Jr. V.G. | * |
dc.author.google | Hillmyer M.A. | * |
dc.author.google | Tolman W.B. | * |
dc.contributor.scopusid | 남원우(7006569723) | * |
dc.date.modifydate | 20240116111857 | * |