DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Cho, I-Whan | - |
dc.contributor.advisor | 조의환 | - |
dc.contributor.author | Song, Soo-Suk | - |
dc.contributor.author | 송수석 | - |
dc.date.accessioned | 2011-12-13T04:25:07Z | - |
dc.date.available | 2011-12-13T04:25:07Z | - |
dc.date.issued | 1989 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=61252&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/31309 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 화학과, 1989.2, [ viii, 99 p. ] | - |
dc.description.abstract | p-Substtituted phenylvinylcyclopropanes, 1-phenyl-2-vinyl-cyclopropane, 1-(p-anisyl)-2-vinylcyclopropane, 1-(p-tolyl)-2-vinylcyclopropane, 1-(p-chlorophenyl)-2-vinyl-cyclopropane and 1-(p-cyanophenyl)-2-vinylcyclopropane, were synthesized and polymerized with various initiators such as Ziegler-Natta catalysts. Their polymerization behavior, characterization and the properties of the resulting polymers were also investigated. Those five p-substituted phenylvinylcyclopropanes exhibited quite different polymerization behavior depending on the properties of their substituents. Polymerization results showed that the monomers with electron-donating substituents were readily polymerizable with Ziegler-Natta catalysts and cationic initiators, whereas the monomers with electron-withdrawing groups were not. And the opposite trend was observed in the polymerization with radical initiators. In the polymerization of methoxy- and methyl-substituted monomers, acidic organoaluminum compounds such as $AlEtCl_2$ based on metal halides were very effective cocatalysts. Ziegler-Natta polymerization is considered to proceed through the proposed coordination mechanism in which a monomer molecule is first coordinated at the catalyst site before propagation and the propagating species then attacks the activated benzylic carbon position of the coordinated monomer to yield 1,5-addition polymers. In radical polymerization of chloro- and cyano-substituted monomers, the reaction is considered to proceed through a mechanism in that a radical attacks at first on the vinyl group to form a cyclopropylcarbinyl radical and then this radical isomerizes to an allylcarbinyl radical with ring-opening. Allylcarbinyl radical will then react with another monomer to propagate. The polymers produced were confirmed to have the structures of five carbon-repeating unit and the double bonds in the polymer chain were in trans form. All the polymers were soluble in common solvents and flexible film-forming mate... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.title | Ring-opening polymerization of 1-phenyl-20vinylcyclopropane derivatives by ziegler-natta catalysts | - |
dc.title.alternative | 지글러-나타 촉매에 의한 1-페닐-2-비닐시클로프로판 유도체의 개환중합 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 61252/325007 | - |
dc.description.department | 한국과학기술원 : 화학과, | - |
dc.identifier.uid | 000835934 | - |
dc.contributor.localauthor | Cho, I-Whan | - |
dc.contributor.localauthor | 조의환 | - |
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