Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Radical Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

2.7K
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...
2.7K
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.4K
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...
3.4K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.2K
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,...
2.2K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.1K
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...
2.1K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Correction to "Light-Induced Transformation from Covalent to Supramolecular Polymer Networks".

ACS macro letters·2026
Same author

Cytoskeleton-Inspired Mechanically Interlocked Catenane Framework Enabling Robust yet Dynamic Polymer Networks.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Bio-Based Covalent Adaptable Oligorotaxane Networks.

Angewandte Chemie (International ed. in English)·2026
Same author

Mechanical Bond-Mediated Metal-Organic Polyhedra Elastomer.

Journal of the American Chemical Society·2026
Same author

Breaking the toughness-strength trade-off in polymer nanocomposites via a mechanically interlocked interface.

Nature communications·2026
Same author

Water-Processable Covalent-and-Supramolecular Polymeric Binders for Silicon/Carbon Anodes with High Interfacial Stability in Lithium-Ion Batteries.

Angewandte Chemie (International ed. in English)·2026

関連する実験動画

Updated: Sep 9, 2025

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding
14:52

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Published on: September 23, 2018

9.0K

サイドチェーンポリ[2]ロタキサン加熱グラフェンフィルム

Mengling Yang1,2, Guoquan Liu2, Wenbin Wang2

  • 1Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, P. R. China.

ACS macro letters
|September 4, 2025
PubMed
まとめ
この要約は機械生成です。

この研究では,強化された機械特性のためにサイドチェーンポリ[2]ロタキサン (PR) を使用した硬化グラフェンフィルム (PRrGO) が導入されます. 新型PRrGOフィルムは,エネルギー分散メカニズムにより,強度と頑丈性が著しく向上しています.

さらに関連する動画

Graphene Coatings for Biomedical Implants
13:21

Graphene Coatings for Biomedical Implants

Published on: March 1, 2013

21.4K
Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
09:38

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets

Published on: November 7, 2016

8.9K

関連する実験動画

Last Updated: Sep 9, 2025

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding
14:52

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Published on: September 23, 2018

9.0K
Graphene Coatings for Biomedical Implants
13:21

Graphene Coatings for Biomedical Implants

Published on: March 1, 2013

21.4K
Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
09:38

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets

Published on: November 7, 2016

8.9K

科学分野:

  • 材料科学
  • ポリマー化学
  • ナノテクノロジー

背景:

  • グラフェンフィルムは優れた伝導性と安定性を持っていますが,脆性があります.
  • 既存の硬化方法は,主にインターフェイス強化に焦点を当てています.
  • グラフェン複合材料の固有ポリマー特性によるエネルギー分散に関する研究は限られている.

研究 の 目的:

  • 強化されたグラフェンフィルム (PRrGO) を開発し,サイドチェーンポリ[2]ロタキサン (PR) を組み込み,機械性能を向上させる.
  • インターフェイス強化と分子内運動を含むシナージ的硬化メカニズムを調査する.
  • グラフェン基のフィルムの柔らかさと全体的な機械的性質を改善する.

主な方法:

  • サイドチェーンポリ[2]ロタキサン (PR) で改造されたグラフェンフィルムの製造.
  • 引力強度,断裂時の張力,ヤングのモジュール,および性を評価する機械試験.
  • 硬化メカニズムの解明のための分子ダイナミクスシミュレーション

主要な成果:

  • PRrGOフィルムは,引力強度の4.27倍 (183MPa) と,タフさの8.33倍 (17.2MJ/m3) を示した.
  • 破裂時のストレンは2. 37倍 (20. 9%),ヤングのモジュールは原始のrGOフィルムと比較して1. 25倍 (896 MPa) 増加した.
  • PRrGOは従来のポリマー改性グラフェンフィルム (CrGO) を大幅に上回りました.

結論:

  • PRの組み込みは,インターフェイス強化と分子内エネルギー分散の両方を提供し,優れた機械的性質をもたらします.
  • 分子ダイナミクスのシミュレーションでは,PRの分子内運動とグラフェンのpi-pi相互作用を含むシネージ的硬化メカニズムが確認されました.
  • この研究は,ポリ[2]ロタキサンがグラフェン工学と2D材料の性能を向上させる可能性を強調している.