2021 Fiscal Year Final Research Report
High-temperature cationic polymerization achieved by unusual stabilization of the active species with solvate ionic liquids
| Project/Area Number |
19K05585
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 35010:Polymer chemistry-related
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| Research Institution | The University of Tokushima |
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Principal Investigator |
HIRANO Tomohiro 徳島大学, 大学院社会産業理工学研究部(理工学域), 准教授 (80314839)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | カチオン重合 / 溶媒和イオン液体 / ビニルエーテル / trans-アネトール / 立体規則性 |
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| Outline of Final Research Achievements |
Controlled cationic polymerizations of a wide range of monomers have been achieved with a reversible equilibrium between active and dormant species. In this study, controlled cationic polymerization with a direct stabilization of propagating cationic species by solvate ionic liquid composed of lithium salt and Lewis base was investigated. Thermal cationic polymerization of isobutyl vinyl ether, stereoregulation in cationic polymerization of 2,3-dihydrofuran and cationic homopolymerization of trans-anethole, which has a poor polymerizability, were examined.
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| Free Research Field |
高分子化学
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| Academic Significance and Societal Importance of the Research Achievements |
カチオン重合ではH2Oなどの不純物が重合禁止剤として働くため，モノマーや溶媒などの試薬の精製が必要となる．また，ポリマー物性に大きな影響を及ぼす立体規則性をカチオン重合で規制することは難しい．本研究では，Li塩とルイス塩基からなる溶媒和イオン液体による成長カチオン種の直接安定化という新しい概念を提案し，試薬の徹底的な精製を必要としない重合系の開発に成功し，カチオン重合における立体規制の可能性を示唆する成果も得た．カチオン重合の新しい制御法を提案したと考えている．
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