ステレオブロックコポリマーと,制御/生根ポリメリゼーションにおける戦術制御
Jean-François Lutz1, Dorota Neugebauer, Krzysztof Matyjaszewski
1Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA.
Journal of the American Chemical Society
|June 5, 2003
まとめ
ルイス酸により強化された原子移転激素ポリメリゼーション (ATRP) や可逆添加断片移転 (RAFT) ポリメリゼーションなどの制御された激素ポリメリゼーション技術により,異質性ポリ (N,N-ジメチラクリラミド) とステレオブロック共ポリマーが成功しました.
科学分野:
- ポリマー化学のポリマー化学について
- マテリアルサイエンス 材料科学
背景:
- コントロール/ライブ・ラジカル・ポリメリゼーション (CLRP) 方法は,定義されたアーキテクチャを持つポリマーを合成するために不可欠です.
- ルイス酸は,ポリマーの戦術性に影響を与え,材料の特性に影響を与える可能性があります.
- N,N-ジメチラクリラミド (N,N-DMA) ポリメリゼーションは,立体化学制御の研究のためのプラットフォームを提供します.
研究 の 目的:
- ポリ (N,N-DMA) の戦術性を制御するATRP,RAFT,およびNMPの有効性を調査する.
- ルイス酸,特にY ((OTf) ((3) とYb ((OTf) ((3) のポリメリゼーション中のイソタクシー性の強化におけるルイス酸の使用を調査する.
- ラジカルポリメリゼーションによるステレオブロックコポリマーの最初のワンポット合成を達成するために.
主な方法:
- 原子移転ラジカルポリメリゼーション (ATRP) は,特定の始動システムとCuCl/Me(6) TREN.
- カミルディチオベンゾアート移転剤を使用した可逆添加断片移転 (RAFT) ポリメリゼーション.
- ニトロキシド介質ポリメリゼーション (NMP) は,SG1ニトロキシドを使用しています.
- ルイス酸 (Y(OTf) ((3),Yb(OTf) ((3)) を加え,ポリメリゼーションと戦術に影響を与える.
主要な成果:
- Y ((OTf) ((3) の存在におけるATRPとRAFTは,分子量制御,低ポリ分散性 (<1.2),高同毒性 (~85%のメソダイアド) を有するポリ ((N,N-DMA) を生成した.
- ルイス酸と組み合わせたNMPは,鎖構造と微細構造 (~65%のメソダイアード) のコントロールを弱めた.
- アタクティック-b-イソタクティックポリ (N,N-DMA) ステレオブロック共ポリマーのワンポット合成の成功は,ATRP/Y (OTf) 3およびRAFT/Y (OTf) 3システムを用いて実証されました.
結論:
- ATRPとRAFTのポリメリゼーションは,Y (((OTf) ((3) と組み合わせると,ポリ (((N,N-DMA) の戦術性を効果的に制御します.
- これらのルイス酸媒介のCLRPシステムは,単一のポットで明確に定義されたステレオブロックコポリマーの合成を可能にします.
- この発見は,マイクロ構造と特性を合わせた高度なポリマー材料を作成するための道を開く.
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