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関連する概念動画

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...
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...
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

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 species into the...
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,...
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta catalyst, high molecular...

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関連する実験動画

Updated: May 9, 2026

Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
08:09

Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery

Published on: August 6, 2019

配列制御されたポリマー.

Jean-François Lutz1, Makoto Ouchi, David R Liu

  • 1Precision Macromolecular Chemistry Group, Institut Charles Sadron, UPR22-CNRS, 23 rue du Loess, Boîte Postale 84047, 67034 Strasbourg Cedex 2, France.

Science (New York, N.Y.)
|August 10, 2013
PubMed
まとめ
この要約は機械生成です。

配列制御ポリマーは,DNAのように,オーダーされたモノマー配列を提供する. ナノテクノロジーや合成化学の進歩により,その応用は生物学を超えて,データストレージやナノエレクトロニクスなどの分野へと拡大しています.

さらに関連する動画

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

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

関連する実験動画

Last Updated: May 9, 2026

Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
08:09

Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery

Published on: August 6, 2019

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

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

科学分野:

  • ポリマー化学のポリマー化学について
  • ナノテクノロジー ナノテクノロジー
  • バイオケミストリー バイオケミストリー

背景:

  • 配列制御ポリマーには,秩序付けられたモノマー配列が特徴です.
  • タンパク質やDNAのような生物学的マクロモレキュルは,顕著な例です.
  • 現在の応用は主に分子生物学と生化学である.

研究 の 目的:

  • 非生物学的分野における配列制御ポリマーの重要性が高まっていることを強調する.
  • タンパク質およびDNAベースのナノテクノロジーの進歩について議論します.
  • 非自然な配列制御ポリマーの合成経路を探求する.

主な方法:

  • 生物学的配列制御ポリマー (タンパク質,DNA) のレビュー.
  • タンパク質およびDNAベースのナノテクノロジーの分析.
  • 合成ポリマー化学のアプローチの検討.

主要な成果:

  • 配列制御ポリマーは,データ保存,ナノエレクトロニクス,および触媒処理において極めて重要です.
  • 合成化学は,非自然な配列制御されたポリマーの作成を可能にします.
  • これらの合成ポリマーは,構造,自己組み立て,および材料の特性に対する制御を提供します.

結論:

  • 配列制御ポリマーは,多様な非生物学的用途において大きな可能性を秘めています.
  • 合成的アプローチは,これらのマクロモレキュルの範囲と有用性を拡大しています.
  • 更に発展すれば,材料の特性や機能に対する制御が強化される見込みです.