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Preparation of Pyridylamido Hafnium Complexes for Olefin Polymerization
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 이분열 | - |
| dc.contributor.author | 박경리 | - |
| dc.date.accessioned | 2022-11-29T02:32:18Z | - |
| dc.date.available | 2022-11-29T02:32:18Z | - |
| dc.date.issued | 2020-08 | - |
| dc.identifier.other | 30297 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/19823 | - |
| dc.description | 학위논문(석사)--아주대학교 일반대학원 :분자과학기술학과,2020. 8 | - |
| dc.description.tableofcontents | 1. Introduction 1 2. Results and Discussion 4 2.1 Preparation of Hf complexes 4 2.2 X-ray crystallographic analyses 8 2.3 Polymerization experiments 12 3. Conclusions 14 4. Experimental Section 16 4.1 General remarks 16 4.2 A typical CCTP 27 4.3 Ethylene polymerization with flowmeter 28 4.4 High-temperature GPC studies 29 4.5 X-ray crystallography 29 4.6 Crystallographic data on compound 30 5. Acknowledgements 31 6. Reference 31 7. Supporting information 40 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | Preparation of Pyridylamido Hafnium Complexes for Olefin Polymerization | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.department | 일반대학원 분자과학기술학과 | - |
| dc.date.awarded | 2020. 8 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 1151735 | - |
| dc.identifier.uci | I804:41038-000000030297 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/common/orgView/000000030297 | - |
| dc.subject.keyword | coordinative chain transfer polymerization | - |
| dc.subject.keyword | dialkylzinc | - |
| dc.subject.keyword | post-metallocene | - |
| dc.subject.keyword | pyridylamido hafnium complex | - |
| dc.description.alternativeAbstract | The pyridylamido hafnium complex (I) discovered at Dow is a flagship catalyst among postmetallocenes, which are used in the polyolefin industry for PO-chain growth from a chain transfer agent, dialkylzinc. In the present work, with the aim to block a possible deactivation process in prototype compound I, the corresponding derivatives were prepared. A series of pyridylamido Hf complexes were prepared by replacing the 2,6-diisopropylphenylamido part in I with various 2,6-R2C6H3N- moieties (R = cycloheptyl, cyclohexyl, cyclopentyl, 3-pentyl, ethyl, or Ph) or by replacing 2-iPrC6H4C(H)- in I with the simple PhC(H)- moiety. The isopropyl substituent in the 2-iPrC6H4C(H)- moiety influences not only the geometry of the structures (revealed by X-ray crystallography) but also catalytic performance. In the complexes bearing the 2-iPrC6H4C(H)- moiety, the chelation framework forms a plane; however, this framework is distorted in the complexes containing the PhC(H)- moiety. The ability to incorporate a-olefin decreased upon replacing 2-iPrC6H4C(H)- with the PhC(H)- moiety. The complexes carrying the 2,6-di(cycloheptyl)phenylamido or 2,6-di(cyclohexyl)phenylamido moiety (replacing the 2,6-diisopropylphenylamido part in I) showed somewhat higher activity with greater longevity than did prototype catalyst I. | - |
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- Graduate School of Ajou University > Department of Molecular Science and Technology > 3. Theses(Master)
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