素早く選択的な二次挿入を介して,触媒アクリラートポリメリゼーションにおけるチェーン転送の抑制
Zhongbao Jian1, Moritz C Baier, Stefan Mecking
1Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz , Universitätsstrasse 10, 78457 Konstanz, Germany.
Journal of the American Chemical Society
|February 13, 2015
まとめ
コポリメリゼーションにおけるチェーン転送は,アクリルアンヒドリドの急速な連続挿入によって解決されます. この方法では,コポリマー分子重量を増強し,循環単位とプライマリアルキル群を形成し,鎖の成長を改善します.
科学分野:
- ポリマー化学のポリマー化学について
- オーガニック・シンセシス オーガニック・シンセシス
- マテリアルサイエンス 材料科学
背景:
- 触媒共ポリメリゼーションは,極性ビニルモノマーを組み込んだ後,しばしば望ましくない鎖移転に苦しみます.
- この連鎖移動は,達成可能な分子量とポリマー構造の制御を制限する.
研究 の 目的:
- 触媒共ポリメリゼーションにおけるチェーン転送を克服するための新しいアプローチを提示する.
- 特定のモノマー戦略を用いてコポリマー分子量を高めるために.
主な方法:
- アクリルアンヒドリドを,触媒共ポリマー化におけるモノマーとして利用する.
- 急速で連続した分子内挿入メカニズムを使用しています.
主要な成果:
- アクリルアンヒドリドは素早く分子内挿入され,周期的な繰り返し単位 (>96%) を形成します.
- このプロセスは,連鎖の継続的な成長に有利な一次アルキル基を生成します.
- 単機能アクリラート単体を使用すると比較して,コポリマーの分子量が大幅に増加しました.
結論:
- アクリルアンヒドリドの急速な連続した挿入は,望ましくないチェーン転送を効果的に抑制します.
- この戦略は,制御された構造を持つ高分子量共ポリマーへの実行可能な経路を提供します.
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