DC Field | Value | Language |
---|---|---|
dc.contributor.author | CHU, KJ | ko |
dc.contributor.author | CHANG, HS | ko |
dc.contributor.author | Ihm, Son Ki | ko |
dc.date.accessioned | 2008-03-28T09:18:08Z | - |
dc.date.available | 2008-03-28T09:18:08Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 1994-12 | - |
dc.identifier.citation | EUROPEAN POLYMER JOURNAL, v.30, no.12, pp.1467 - 1472 | - |
dc.identifier.issn | 0014-3057 | - |
dc.identifier.uri | http://hdl.handle.net/10203/3540 | - |
dc.description.abstract | TiCl3/2.5MgCl2(0.5MgEt2)/THF catalyst (R) was prepared by the reduction of TiCl4 with EtMgCl. The effect of diethyl aluminum chloride (DEAC) addition on the catalytic activity in ethylene-propylene copolymerization was investigated. It was suggested from FT-i.r. that the catalyst R formed similar bimetallic (Ti-Mg-THF) complexes to the TiCl3(AA)/3MgCl2/THF catalyst (T3ME) of our previous report [7]. An ESR study provided evidence that the Ti3+ species in the catalyst R was of the multinuclear type, instead of an isolated type of T3ME, and it changed from a tetrahedral to an octahedral structure with addition of DEAC. The activities of R catalysts in copolymerization were more or less in the same order of magnitude with each other due to the multinuclear nature of the Ti3+ species, and the response to propylene comonomer decreased with addition of DEAC. The polydispersity of comonomer over R catalysts was in the range of 6-10, being much broader than that over the T3ME catalyst system. It might be due to the heterogeneity of the titanium(III) structure; tetrahedral as well as octahedral in R, instead of only octahedral in T3ME. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | Pergamon-Elsevier Science Ltd | - |
dc.subject | ZIEGLER-NATTA CATALYSTS | - |
dc.subject | OLEFIN POLYMERIZATION | - |
dc.subject | TITANIUM | - |
dc.subject | PROPENE | - |
dc.title | Effects of diethyl aluminum chloride (DEAC) addition to the catalysts prepared by reduction of TiCl4 with EtMgCl on ethylene-propylene copolymerization | - |
dc.type | Article | - |
dc.identifier.wosid | A1994PW22600020 | - |
dc.identifier.scopusid | 2-s2.0-0028730310 | - |
dc.type.rims | ART | - |
dc.citation.volume | 30 | - |
dc.citation.issue | 12 | - |
dc.citation.beginningpage | 1467 | - |
dc.citation.endingpage | 1472 | - |
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.contributor.nonIdAuthor | CHU, KJ | - |
dc.contributor.nonIdAuthor | CHANG, HS | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | ZIEGLER-NATTA CATALYSTS | - |
dc.subject.keywordPlus | OLEFIN POLYMERIZATION | - |
dc.subject.keywordPlus | TITANIUM | - |
dc.subject.keywordPlus | PROPENE | - |
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