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Polystyrene Chain Growth Initiated from Dialkylzinc for Synthesis of Polyolefin-Polystyrene Block Copolymers
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 이분열 | - |
| dc.contributor.author | 김태진 | - |
| dc.date.accessioned | 2022-11-29T02:32:02Z | - |
| dc.date.available | 2022-11-29T02:32:02Z | - |
| dc.date.issued | 2020-02 | - |
| dc.identifier.other | 29920 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/19523 | - |
| dc.description | 학위논문(석사)--아주대학교 일반대학원 :분자과학기술학과,2020. 2 | - |
| dc.description.tableofcontents | Abstract I 1. Introduction 3 2. Materials and Methods 4 2.1. Conversion of (1-octyl)2Zn to (1-octyl)Li 5 2.2. 1-Octene, n-BuLi, and PMDTA in methylcyclohexane . 5 2.3. Me2NCH2CH2N(Me)CH2CH2N(Me)CH2Li 5 2.4. Me2NCH2CH2N(Me)Li . 5 2.5. Pentylallyl-Li(PMDTA) . 5 2.6. PhLi(PMDTA) 6 2.7. PS chain growth from (1-hexyl)2Zn . 6 2.8. Synthesis of poly(ethylene-co-propylene)-b-PS 6 3. Results and Discussion 7 3.1. Converting dialkylzinc to alkyllithium . 7 3.2. Attempts to synthesize block copolymers 9 3.3. Initiators for PS chain growth from dialkylzinc 10 3.4. Synthesis of PO-block-PS 13 4. Conclusions 17 5. Acknowlegements 18 6. Reference . 18 7. Supporting information 24 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | Polystyrene Chain Growth Initiated from Dialkylzinc for Synthesis of Polyolefin-Polystyrene Block Copolymers | - |
| dc.title.alternative | Tae Jin Kim | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.alternativeName | Tae Jin Kim | - |
| dc.contributor.department | 일반대학원 분자과학기술학과 | - |
| dc.date.awarded | 2020. 2 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 1138573 | - |
| dc.identifier.uci | I804:41038-000000029920 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/common/orgView/000000029920 | - |
| dc.subject.keyword | coordinative chain transfer polymerization | - |
| dc.subject.keyword | dialkylzinc | - |
| dc.subject.keyword | initiator | - |
| dc.subject.keyword | organolithium | - |
| dc.description.alternativeAbstract | Polyolefins (POs) are the most abundant polymers; however, synthesis of PO-based block copolymers has only rarely been achieved. We aimed to synthesize various PO-based block copolymers by coordinative chain transfer polymerization (CCTP) followed by anionic polymerization in one-pot via conversion of the CCTP product (polyolefinyl)2Zn to polyolefinyl-Li. Addition of 2 equiv t-BuLi to (1-octyl)2Zn (a model compound of (polyolefinyl)2Zn) and selective removal or decomposition of (tBu)2Zn by evacuation or heating at 130 °C afforded 1-octyl-Li. Attempts to convert (polyolefinyl)2Zn to polyolefinyl-Li were unsuccessful. However, polystyrene (PS) chains were efficiently grown from (polyolefinyl)2Zn; the addition of styrene monomers after treatment with t-BuLi and pentamethyldiethylenetriamine (PMDTA) in the presence of residual olefin monomers afforded PO-block-PSs. Organolithium species that might be generated in the pot of t-BuLi, PMDTA, and olefin monomers, i.e., [Me2NCH2CH2N(Me)CH2CH2N(Me)CH2Li, Me2NCH2CH2N(Me)Li·(PMDTA), pentylallyl-Li(PMDTA)], as well as PhLi(PMDTA), were screened as initiators to grow PS chains from (1-hexyl)2Zn as well as from (polyolefinyl)2Zn. Pentylallyl-Li(PMDTA) was the best initiator. The Mn values increased substantially after the styrene polymerization with some generation of homo-PSs (2729%). The Mn values of the extracted homo-PS suggested that PS chains were grown mainly from polyolefinyl groups in [(polyolefinyl)2(pentylallyl)Zn][Li(PMDTA)]+ formed by pentylallyl-Li(PMDTA) acting onto (polyolefinyl)2Zn. | - |
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