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関連する概念動画

Fast Reactions01:27

Fast Reactions

Fast reactions occurring in times shorter than the time needed to mix reactants pose a unique challenge for investigation. In a liquid-phase continuous-flow system, reactants A and B are swiftly pushed into the mixing chamber, where mixing occurs within 1 ms. The reaction mixture then flows through an observation tube, and one measures light absorption to determine species concentrations at various points of the tube. This method is most appropriate when relatively large volumes of reactants...
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

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.
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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...
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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 of a...
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the generated carbocation,...
Radical Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...

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Updated: Jun 3, 2026

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
07:28

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization

Published on: November 27, 2015

マイクロリアクターでの連続流酵素触媒ポリメリゼーション.

Santanu Kundu1, Atul S Bhangale, William E Wallace

  • 1Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States.

Journal of the American Chemical Society
|March 29, 2011
PubMed
まとめ
この要約は機械生成です。

マイクロリアクターを用いた酵素触媒ポリメリゼーションは,よりグリーンで継続的なプロセスを提供します. この新しいアプローチは,伝統的なバッチ方法と比較して,より速い反応とより高い分子量ポリカプロラクトンを達成します.

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Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
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Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

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Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations
13:09

Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations

Published on: January 4, 2018

関連する実験動画

Last Updated: Jun 3, 2026

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
07:28

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization

Published on: November 27, 2015

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations
13:09

Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations

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科学分野:

  • バイオカタリシスとポリマー化学
  • 化学工学とプロセスの強化

背景:

  • 固体上に固定された酵素は,持続可能な化学的変換を可能にします.
  • マイクロリアクターは,異質な反応を制御するための利点を提供します.

研究 の 目的:

  • 新しいマイクロリアクターの設計を用いて,酵素触媒による ε-カプロラクトンのリング開きポリメリゼーションを調査する.
  • このポリメリゼーションプロセスのために,マイクロリアクターの性能をバッチリアクターと比較する.

主な方法:

  • 継続的な流れのための新しいマイクロリアクターを活用し, ε-カプロラクトンの酵素触媒リング開きポリメリゼーションを行いました.
  • 有機介質で高温で固体基の酵素を用いた.
  • ポリメリゼーション運動と製品特性を,従来のバッチ・リアクターと比較した.

主要な成果:

  • マイクロリアクターシステムでより速いポリメリゼーション率を達成しました.
  • 生産されたポリカプロラクトンは,バッチ処理と比較してより高い分子量を持つ.
  • 固体支持型酵素触媒ポリメリゼーションの連続フローの可行性を実証した.

結論:

  • マイクロリアクター技術は,効率的かつ持続可能な酵素触媒ポリメリゼーションを可能にします.
  • このプラットフォームは,バイオカタリシスの高通量スクリーニングと精度測定に適応することができます.
  • 固体支持型酵素触媒ポリメリゼーションの最初の連続フローの実証を示しています.