DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ko, YS | ko |
dc.contributor.author | Woo, Seong-Ihl | ko |
dc.date.accessioned | 2019-03-06T12:14:54Z | - |
dc.date.available | 2019-03-06T12:14:54Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2003-07 | - |
dc.identifier.citation | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.41, no.14, pp.2171 - 2179 | - |
dc.identifier.issn | 0887-624X | - |
dc.identifier.uri | http://hdl.handle.net/10203/250648 | - |
dc.description.abstract | CP2ZrCl2 confined inside the supercage of NaY zeolites [NaY/methylaluminoxane (MAO)/Cp2ZrCl2] exhibited the shape and diffusion of a monomer-controlled copolymerization mechanism that strongly depended on the molecular structure of the monomer and its size. For the ethylene-propylene copolymerization, NaY/MAO/Cp2ZrCl2 showed the effect of the comonomer on the increase in the polymerization rate in the presence of propylene, whereas the ethylene/1-hexene copolymerization showed little comonomer effect, and the ethylene/1-octene copolymerization instead showed a comonomer depression effect on the polymerization rate. Isobutylene, having a larger kinetic diameter, had little influence on the copolymerization behaviors with NaY/MAO/Cp2ZrCl2 for the ethylene-isobutylene copolymerization, which showed evidence of the shape and diffusion of a monomer-controlled mechanism. The content of the comonomer in the copolymer chain prepared with NaY/MAO/Cp2ZrCl2 decreased by about one-half in comparison with that of Cp2ZrCl2. A differential scanning calorimetry study on the melting endotherms after the successive annealing of the copolymers showed that the copolymers of NaY/MAO/Cp2ZrCl2 had narrow cornonomer distributions, whereas those of homogeneous Cp2ZrCl2 were broad. (C) 2003 Wiley Periodicals, Inc. | - |
dc.language | English | - |
dc.publisher | JOHN WILEY & SONS INC | - |
dc.subject | LOW-DENSITY POLYETHYLENE | - |
dc.subject | METALLOCENE CATALYSTS | - |
dc.subject | POLYMERIZATION | - |
dc.subject | MCM-41 | - |
dc.title | Shape and diffusion of the monomer-controlled copolymerization of ethylene and alpha-olefins over Cp2ZrCl2 confined in the nanospace of the supercage of NaY | - |
dc.type | Article | - |
dc.identifier.wosid | 000183812100004 | - |
dc.identifier.scopusid | 2-s2.0-0037490856 | - |
dc.type.rims | ART | - |
dc.citation.volume | 41 | - |
dc.citation.issue | 14 | - |
dc.citation.beginningpage | 2171 | - |
dc.citation.endingpage | 2179 | - |
dc.citation.publicationname | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | - |
dc.contributor.localauthor | Woo, Seong-Ihl | - |
dc.contributor.nonIdAuthor | Ko, YS | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | nanotechnology | - |
dc.subject.keywordAuthor | ethylene polymerization | - |
dc.subject.keywordAuthor | zeolites | - |
dc.subject.keywordAuthor | Cp2ZrCl2 | - |
dc.subject.keywordAuthor | supported catalysts | - |
dc.subject.keywordAuthor | metallocene | - |
dc.subject.keywordPlus | LOW-DENSITY POLYETHYLENE | - |
dc.subject.keywordPlus | METALLOCENE CATALYSTS | - |
dc.subject.keywordPlus | POLYMERIZATION | - |
dc.subject.keywordPlus | MCM-41 | - |
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