DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ihm, Son Ki | ko |
dc.date.accessioned | 2008-03-31T06:50:29Z | - |
dc.date.available | 2008-03-31T06:50:29Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2000-01 | - |
dc.identifier.citation | EUROPEAN POLYMER JOURNAL, v.36, no.1, pp.3 - 11 | - |
dc.identifier.issn | 0014-3057 | - |
dc.identifier.uri | http://hdl.handle.net/10203/3601 | - |
dc.description.abstract | The effect of prepolymerization and hydrogen pressure on ethylene/1-hexene copolymerization was investigated with two catalysts having different Ti3+ structure, i.e., isolated Ti3+ and multinuclear Ti3+ species. After prepolymerization with 1-hexene under mild conditions in the absence of hydrogen, the polymerization rates of both catalysts were enhanced. However, in the presence of hydrogen, both catalysts showed a decrease in the polymerization rate. From microstructure analyses with carbon-13 nuclear magnetic resonance (C-13-NMR), gel permeation chromatography and crystallization analysis fractionation, prepolymerization for both catalysts increased the reactivity of 1-hexene and changed the short chain branching distribution (SCBD) of the produced polymer but did not alter the molecular weight distribution (MWD). In the presence of hydrogen, isolated Ti3+ species showed a remarkable increase in the 1-hexene reactivity and produced copolymers having broad MWDs and SCBDs. Multinuclear Ti3+ species did not show significant changes in 1-hexene reactivity and SCBD of the produced copolymer when exposed to hydrogen. (C) 1999 Elsevier Science Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | Pergamon-Elsevier Science Ltd | - |
dc.subject | ZIEGLER-NATTA CATALYSTS | - |
dc.subject | CRYSTALLIZATION ANALYSIS FRACTIONATION | - |
dc.subject | RISING ELUTION FRACTIONATION | - |
dc.subject | ALPHA-OLEFINS | - |
dc.subject | ETHYLENE | - |
dc.subject | POLYMERIZATION | - |
dc.subject | PROPYLENE | - |
dc.subject | DISTRIBUTIONS | - |
dc.subject | POLYOLEFINS | - |
dc.subject | MECHANISM | - |
dc.title | Effect of Prepolymerization and Hydrogen Pressure on the Microstructure of Ethylene/1-Hexene Copolymers Made with MgCl2-Supported TiCl3 Catalysts | - |
dc.type | Article | - |
dc.identifier.wosid | 000083802400001 | - |
dc.identifier.scopusid | 2-s2.0-0033708388 | - |
dc.type.rims | ART | - |
dc.citation.volume | 36 | - |
dc.citation.issue | 1 | - |
dc.citation.beginningpage | 3 | - |
dc.citation.endingpage | 11 | - |
dc.citation.publicationname | EUROPEAN POLYMER JOURNAL | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Ihm, Son Ki | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | ZIEGLER-NATTA CATALYSTS | - |
dc.subject.keywordPlus | CRYSTALLIZATION ANALYSIS FRACTIONATION | - |
dc.subject.keywordPlus | RISING ELUTION FRACTIONATION | - |
dc.subject.keywordPlus | ALPHA-OLEFINS | - |
dc.subject.keywordPlus | ETHYLENE | - |
dc.subject.keywordPlus | POLYMERIZATION | - |
dc.subject.keywordPlus | PROPYLENE | - |
dc.subject.keywordPlus | DISTRIBUTIONS | - |
dc.subject.keywordPlus | POLYOLEFINS | - |
dc.subject.keywordPlus | MECHANISM | - |
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