熱的に安定し,化学的にリサイクル可能な,床の温度によって調節されるポリケタルエステル
Xian-Bin Meng1, Tong Zhou1, Chun Yang1
1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, China.
Journal of the American Chemical Society
|May 25, 2024
まとめ
この研究は,持続可能なプラスチックのための新しい床温度調節ポリケタルエステル (PHOD) を導入します. PHODは優れた熱安定性と 室温の化学薬品の迅速なリサイクルにより 循環経済目標を達成しています
科学分野:
- ポリマー化学
- 材料科学
- 持続可能な化学
背景:
- モノマーへの化学リサイクル (CRM) は,通常,天井温度 (Tc) 調節に焦点を当てた循環プラスチック経済の鍵です.
- 低Tcのポリマー,例えばポリ・グー・ブチロラクトン (PGBL) は,限られた熱安定性 (分解度 ~ 200 °C) を有する.
- 床温度 (Tf) 調節されたポリマー,特にマクロラクトンリング開きポリメリゼーション (ROP) は熱力学的安定性を高めますが,十分に研究されていません.
研究 の 目的:
- バイオベースモノマーを用いて,新しいTf調節された,化学的にリサイクル可能な閉環ポリマーを開発する.
- 合成されたポリケタルエステル (PHOD) の熱安定性と再利用性を調査する.
- コポリメリゼーションの調節性や再利用性を調べる
主な方法:
- バイオベースのマクロサイクリックダイエスターモノマー (HOD) の設計と合成
- HODのエントロピー駆動型リング開封ポリメリゼーション (ROP) で,ポリケタルエステル (PHOD) を生成する.
- 1 - ブチリウムカリウム (tBuOK) を使用して,室温での熱安定性 (Td,5%) と閉鎖ループの化学再利用性を評価.
- ペンタデカノリド (PDL) とHODの共ポリマー化
主要な成果:
- 高モラー質量PHODは,特異的な熱安定性 (Td,5%まで353 °C) で合成され,触媒を除去しても345 °Cを維持した.
- PHODは,室温で高速 (1分) のクローズドループの化学再利用性を実証した.
- コポリマー (PHOD-co-PPDL) は,調節可能な機械的特性と両方のモノマーユニットのリサイクル性を示した.
結論:
- Tf調節されたPHODは,Tc調節されたポリマーの有望な代替品であり,熱安定性の制限を克服します.
- 開発された素材は低温で効率的な化学リサイクルを可能にし,循環型プラスチック経済を支援します.
- コポリメリゼーションは 性能と再利用性を合わせた 高度な材料への経路を提供します
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