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関連する概念動画

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

3.2K
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...
3.2K
Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

3.4K
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...
3.4K
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.6K
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...
2.6K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

4.5K
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...
4.5K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.9K
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...
2.9K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

2.3K
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...
2.3K

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関連する実験動画

Updated: Feb 17, 2026

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

Published on: June 20, 2019

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環開きメタテシスポリメリゼーションを用いたアップサイクリングされたモノマーからのワンステップブロック型の共ポリマー.

Jeffrey C Foster1, Isaiah T Dishner1, Jackie Zheng1

  • 1Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.

ACS polymers Au
|February 16, 2026
PubMed
まとめ

廃棄ポリブタジエンは,サイクロデポリメリゼーションとリング開きメタテシスポリメリゼーションを使用して,価値のあるブロック状コポリマーに変換されます. この新しい方法は,優れた熱力学特性とナノ相分離を持つ材料を生成します.

キーワード:
ブロックコポリマーコポリマーグラデーションコポリマーコポリマープラスチックの廃棄物の再利用ポリマー材料のポリマー材料についてリング開きメタテシスポリメリゼーション

さらに関連する動画

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

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関連する実験動画

Last Updated: Feb 17, 2026

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

Published on: June 20, 2019

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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

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科学分野:

  • ポリマー化学のポリマー化学について
  • マテリアルサイエンス 材料科学
  • オーガニック・シンセシス オーガニック・シンセシス

背景:

  • ブロック型の共ポリマーは,通常,分離された反応率を持つモノマーを使用して合成されます.
  • ポリブタジエンは,サイクロドポリメリゼーション (CDP) を通して1,5,9-サイクロドデカトリエン (CDT) に変換できます.

研究 の 目的:

  • リング開きメタテシスポリメリゼーション (ROMP) によるノルボネンモノマーによるCDTのグラデント共ポリメリゼーションを調査する.
  • 廃棄プラスチックを高価値の熱プラスチック材料に変換するための新しい経路を開発する.

主な方法:

  • ポリブタジエンのサイクロドポリメリゼーション (CDP) で1,5,9-サイクロドデカトリエン (CDT) を生成する.
  • ノルボルネン単体によるCDTのリング開きメタテシスポリメリゼーション (ROMP).
  • 結果となるブロック状コポリマーのナノフェーズ分離と熱力学的性能の特徴.

主要な成果:

  • 鋭い組成のドリフトを持つブロック状コポリマーの合成に成功した.
  • 結果のコポリマーにおける大量ナノフェーズ分離の実証.
  • 合成された材料で優れた熱力学的性能を達成する.

結論:

  • 新しいROMPコポリメリゼーションシステムが確立されました.
  • プラスチックの廃棄物を高度な熱プラスチック材料にアップサイクリングするためのシンプルで効果的な方法が導入されました.