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関連する概念動画

Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

4.6K
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...
4.6K
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

2.6K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
2.6K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

4.0K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
4.0K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.7K
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,...
2.7K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.6K
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...
2.6K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

10.1K
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.
10.1K

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Updated: Mar 10, 2026

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

Published on: December 16, 2022

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自律的なライフサイクル制御を持つポリマー

Jason F Patrick1, Maxwell J Robb1,2, Nancy R Sottos1,3

  • 1Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.

Nature
|December 16, 2016
PubMed
まとめ
この要約は機械生成です。

スマート素材は 生命体を真似て 自律的に損傷を修復し 製造物の寿命と持続可能性を 延ばすことができます 現実の世界での応用のために これらの自己修復性ポリマーを開発することは 依然として大きな課題です

さらに関連する動画

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

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Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
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Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery

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関連する実験動画

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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
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科学分野:

  • 材料科学
  • ポリマー科学
  • バイオミミクリ

背景:

  • 人工素材は 日常使用,環境要因,損傷により劣化し,寿命が短縮され,廃棄されます.
  • 生物は自己保護,自己損傷,自己治癒,あるいは自己再生という 驚くべき能力を備えています
  • 生物学的自己修復能力を 合成材料に模倣することで 耐久性や持続可能性が向上します

研究 の 目的:

  • スマートマテリアルの可能性を探求し,製造製品の機能寿命を延長する.
  • セルフヒーリングとセルフレポートのポリマーベースの材料を開発するためのアプローチを調査する.
  • これらのスマート素材の機能が 現実の世界で 変化する条件で実現されるという課題に取り組むこと

主な方法:

  • セルフヒーリングとセルフレポートのポリマーシステムを構築するための現在の戦略をレビューします.
  • 生物が自律的に修復・再生するメカニズムを分析する
  • 研究室での発見を実用化するための限界と課題を特定する.

主要な成果:

  • スマート素材は 生物学的システムを真似て 自律的なダメージレスポンスを 実現する可能性を秘めています
  • ポリマーベースのアプローチは,自己治癒,自己報告,再生機能のために開発されています.
  • これらのスマートマテリアルが 多様で予測不可能な環境で 頑丈で信頼性を保つのに 大きな障害があります

結論:

  • スマート素材は 材料の耐久性や安全性 持続可能性に革命をもたらす可能性を秘めています
  • 実践的な課題を克服するためにさらなる研究が不可欠です.
  • バイオミメティックデザインと機能的な材料の性能の間のギャップを埋めることは,将来の進歩の鍵です.