DC Field | Value | Language |
---|---|---|
dc.contributor.author | I. Kim | ko |
dc.contributor.author | S.I. Woo | ko |
dc.date.accessioned | 2019-03-06T21:15:57Z | - |
dc.date.available | 2019-03-06T21:15:57Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 1991-06 | - |
dc.identifier.citation | 폴리머, v.15, no.3, pp.348 - 355 | - |
dc.identifier.issn | 0379-153X | - |
dc.identifier.uri | http://hdl.handle.net/10203/250783 | - |
dc.description.abstract | A comparative study has been made on the behaviors of ethylene, propylene, 1-butene and styrene polymerizations using a new MgCl2-supported TiCl4 catalyst prepared by the reaction of Mg(OEt)2 with Ti(OBu)4, phthalic anhydride and TiCl4, in conjunction with AlEt3 and phenyltriethoxy silane (PTES). Solubilities of monomers to a solvent (n-heptane) were also measured with a view to comparing the productivity of catalyst for each monomer and calculating the propagation rate constant (kp ) more exactly in slurry-phase polymerizations. The order of activity for olefin polymerizations was changed before and after normalization based on the concentration of monomer in n-heptane. The isotacticity (I.I.) of polypropylene (PP) and poly(1-butene) (PB) was remakably improved by PTES and simlar rate-time profiles were observed for propylene and 1-butene polymerizations, suggesting that the nature of active sites for both monomers is similar to each other. From the measurement of the number of active sites (C*), it was clear that both C* and kp were in the order of ethylene > propylene > 1-butene. The results on styrene polymerizations (activity and isospecificity) in the absence and presence of PTES suggested that isotactic polymerization of styrene proceeds via heterogeneous Ziegler-Natta catalysts without regard to the I.I. in propylene polymerizations. | - |
dc.language | English | - |
dc.publisher | 한국고분자학회 | - |
dc.title | A Comparative Study on the Polymerization of Ethylene,Propylene,1-Butene and Styrene over a Highly Active MgCl₂-Supported TiCl₄ Catalyst | - |
dc.title.alternative | 고활성 염화마그네슘 담지 티탄촉매에 의한 에틸렌, 프로필렌, 1-부텐 및 스티렌 중합의 비교 연구 | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.citation.volume | 15 | - |
dc.citation.issue | 3 | - |
dc.citation.beginningpage | 348 | - |
dc.citation.endingpage | 355 | - |
dc.citation.publicationname | 폴리머 | - |
dc.contributor.localauthor | S.I. Woo | - |
dc.contributor.nonIdAuthor | I. Kim | - |
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