高モラー質量ポリカーボネート 閉環リサイクル可能な熱プラスチック
Gloria Rosetto1, Fernando Vidal1, Thomas M McGuire1
1Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Rd, Oxford OX1 3TA, U.K.
Journal of the American Chemical Society
|March 14, 2024
まとめ
この研究では,高モール質量のリサイクル可能なポリカーボネートを生成する,効率的な二酸化炭素 (CO2) コポリメリゼーションのための新しいMg (II) Co (II) カタリストを導入しています. 新しい触媒は調整可能な性質と効果的な脱ポリメリゼーションを可能にし,ポリマー製造のための持続可能な代替案を提供します.
科学分野:
- ポリマー化学
- オルガノメタリック触媒
- 持続可能な素材
背景:
- ポリマー製造における温室効果ガスの排出量を削減することは極めて重要です.
- 環開き共ポリメリゼーション (ROCOP) による二酸化炭素 (CO2) 利用は,CO2由来ポリカーボネートへの経路を提供します.
- 高モール質量ポリカーボネートの効率的な触媒とその構造-特性関係は,まだ十分に研究されていない.
研究 の 目的:
- CO2から高モール質量ポリカーボネートのための効率的な触媒を開発する.
- これらの新しいポリカーボネートの構造と性質の関係,加工,再利用性を明らかにする.
- 持続可能な代替品としてのCO2ベースの熱プラスチックの可能性を探求する.
主な方法:
- 新しい有機金属のMg (II) Co (II) 触媒の開発
- 環開き共ポリメリゼーション (ROCOP) のCO2を様々なバイサイクルエポキシドで.
- 分子重量,熱特性 (Tg,Td),およびレオロジカルな振る舞いを含む結果のポリカーボネートの特徴.
- 再処理と触媒脱ポリメリゼーションによる再利用性の評価
主要な成果:
- Mg (II) Co (II) 触媒は高生産性,低負荷耐性,優れたポリメリゼーション制御を示した.
- PCHC,PvCHC,PeCHC,PCPCを含む高モラー質量ポリカーボネート (Mn > 100 kg mol-1) を合成した.
- これらの無形な熱プラスチックには,高温のガラス化 (85°C~126°C) と熱的安定性 (≥260°C) がある.
- PCPCは,PCHCと比較して著しく低分子量と粘度を示した.
- すべての合成されたポリマーは再処理または触媒脱ポリマー化によって完全にリサイクル可能でした.
結論:
- 新しいMg (II) Co (II) 触媒は,CO2から高モール質量,リサイクル可能なポリカーボネートの効率的な合成を可能にします.
- 調節可能な材料の性質は,サイクルリングの置換物を変化させることで達成できます.
- PCPCは好ましいレオロギー特性により熱可塑性の可能性を示しています.
- 開発された触媒システムは,ポリマー合成と選択的脱ポリマー化の両方を促進し,プラスチックのための循環経済を促進します.
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