2021 Fiscal Year Final Research Report
Polymer Synthesis, Degradation and Conversion Utilizing Appearance/Disappearance of Functional Groups Synergy
| Project/Area Number |
19H02763
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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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 | Shinshu University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | ケミカルリサイクル / 精密重合 / 高機能化モノマー / 主鎖切断 / 共役置換反応 / リビング重合 / 刺激応答材料 |
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| Outline of Final Research Achievements |
This research project aimed the developments of novel precise polymerization, polymer degradation, and polymer functions using the synergy of functional groups and bonds appearing/disappearing during the reaction. For example, chemically recyclable vinyl polymers were provided by radical polymerization of vinyl esters and styrene derivatives possessing ethereal bond at the alpha-position. Polyesters and polyurethanes, exhibiting an excellent degradability against some weak nucleophiles such as a carboxylate anion, were developed. The polymers also underwent main chain-scission by small amount of an initiator and re-polymerization to change the backbone structure. New polymerization methods, including living anionic ring-opening polymerization of lactones operatable under air atmosphere and precise polycondensation to afford different repeating units tuned by conditions, were also discovered.
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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 |
機能高分子を設計する場合，ベースとなる高分子に，機能を誘導する官能基や原子団を都度導入する分子設計が一般的である．これに対し，研究代表者は複数の官能基のシナジーを効果的に引き出すことで，個々の官能基以上の機能を高分子に賦与できると考えた．その結果，合成が容易な反面，分解が困難とされていたビニルポリマーについて，効率的な分解技術を提供し，分子レベルでの原料再生と資源循環を実現した．また，一つの原料から性質が異なる高分子材料を誘導する様々な精密重合技術，合成した高分子の性質を必要に応じてチューニングする技術，特殊な装置がなくとも，精密重合によるポリエステル合成を実現する技術を提供した．
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