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関連する概念動画

Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.5K
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...
3.5K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

8.4K
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.
8.4K
Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

2.6K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.6K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

1.4K
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...
1.4K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

1.8K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
1.8K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

2.9K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this...
2.9K

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関連する実験動画

Updated: Apr 24, 2026

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

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配列で定義されたポリマーは,直角アルリルアクリルアミドの構成要素を介して配列で定義される.

Mintu Porel1, Christopher A Alabi

  • 1School of Chemical and Biomolecular Engineering, Cornell University , Ithaca, New York 14853, United States.

Journal of the American Chemical Society
|September 11, 2014
PubMed
まとめ

研究者らは,直角な構成要素と光基材を用いて,シーケンス固有のポリマーを合成する新しい方法を開発した. この技術は,ポリマー配列の正確な制御を可能にし,新しい機能的材料への道を切り開きます.

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:

  • 生物システムは,配列定義されたバイオポリマーの効率的な合成によって,マクロ分子多様性を達成します.
  • ポリマー配列の合成制御は,化学における重要な課題である.
  • シーケンス固有のポリマーの新合成方法の開発は,先進的な材料にとって極めて重要です.

研究 の 目的:

  • 精密な制御でシーケンス固有のポリマーを作成するための新しい合成戦略を開発する.
  • オートゴーナルアルリルアクリラミドのビルディングブロックと液相の光基材の使用の実現可能性を実証する.
  • 様々なシーケンス固有のポリマーの合成と特徴づけを通じて,方法論を検証する.

主な方法:

  • ポリマー合成のために利用された正交アルリルアクリラミドの構成要素.
  • ポリマーの組立を容易にするために,液相の光基材を使用した.
  • 核磁共振 (NMR) スペクトロスコーピーと液体染色体質量スペクトロメトリ (LCMS) を使用して合成されたポリマーを特徴付けました.
  • タンデム質量スペクトロメトリー (MS) を使用してポリマー配列の同一性が確認されました.

主要な成果:

さらに関連する動画

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
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Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

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関連する実験動画

Last Updated: Apr 24, 2026

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

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Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
11:42

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

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  • 2つのシーケンスの同位体10メルのポリマーを合成し,その構造とシーケンスを確認しました.
  • シーケンス固有のポリマーのde novo設計と合成のための実証された概念証明.
  • 配列特異の16メアポリマーを合成し,9つの異なるモノマーを組み込み,その方法の汎用性を検証した.
  • (1) H NMR,LCMS,およびタンデムMSを用いて化学構造と配列同一性が確認されました.

結論:

  • 開発された戦略は,シーケンス固有の機能性ポリマーを組み立てるための効率的なアプローチを提供します.
  • この方法は,合成ポリマー化学における正確な配列制御の達成という課題を克服します.
  • この技術は,特異な特性や用途を持つ新しいポリマーの作成に期待されます.