関連する実験動画
Updated: Oct 26, 2025

11:49
Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
Published on: March 8, 2019
12.8K
多用途の多孔性ポリアリレンエーテル (Pd-Catalyzed C-O Polycondensationによる)
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|July 27, 2021
まとめ
研究者らは,パラジウム触媒反応を用いて,多孔性の有機ポリマー (POP) を合成する新しい方法を開発した. この進歩により,センシングと水処理における応用のための高度な多孔性ポリアリレンエーテル (PAE) が作られる.
科学分野:
- ポリマー化学
- 材料科学
- 有機合成
背景:
- 多孔性有機ポリマー (POP) は,様々な用途で調整可能な特性を提供します.
- ポリアリレンエーテル (PAE) は,望ましい安定性と機械的特性を有する高性能熱プラスチックです.
- 既存のPOP合成は特定のモノマータイプに限定されています.
研究 の 目的:
- 多孔性ポリアリレンエーテル (PAE) の一般的な合成方法を開発する.
- アクセス可能なPAE構成とアーキテクチャの範囲を拡大する.
- 環境に配慮した用途でPAEを活用する.
主な方法:
- パラジウム触媒によるC-Oポリコンデンサ反応
- 活性化されていないアリル塩化物とブロミドを用いたPAEの合成
- 分子重量,熱安定性,および多孔性に関する結果の多孔性PAEの特徴.
主要な成果:
- Pd触媒によるC-Oポリコンデンサスを介してPAEを合成するための新しい一般的な方法が確立されました.
- 新しいPAE組成とアーキテクチャの幅広い範囲が合成されました.
- 合成された多孔性PAEは,高分子量,良好な熱安定性,多孔性を有する.
- 材料は溶液加工可能である.
結論:
- 開発された方法は,PAE合成の範囲を拡大し,新しい多孔性の材料の作成を可能にします.
- これらの多孔型PAEは重金属イオン検出や捕獲などの環境関連アプリケーションに適しています.
- この作業により,耐久性があり機能的な多孔性ポリマーの開発が容易になります.
関連する概念動画
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
2.0K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.0K
Olefin Metathesis Polymerization: Overview
2.3K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.3K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
2.8K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.8K
Types of Step-Growth Polymers: Polyesters
2.4K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.4K
Free-Radical Chain Reaction and Polymerization of Alkenes
8.6K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
8.6K
Step-Growth Polymerization: Overview
3.9K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
3.9K

