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関連する概念動画

Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

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

Anionic Chain-Growth Polymerization: Overview

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,...
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,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...

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関連する実験動画

Updated: Jun 17, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

ブロックコポリマーにはトウィストが付いています.

Rong-Ming Ho1, Yeo-Wan Chiang, Chun-Ku Chen

  • 1Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan. rmho@mx.nthu.edu.tw

Journal of the American Chemical Society
|December 24, 2009
PubMed
まとめ
この要約は機械生成です。

研究者らは,キラルブロックコポリマー (BCP*) で新しい螺旋相 (H*) を発見した. ポリ・チレン・ビ・ポリ・リ・ラクチド (PS-PLLA) BCP*のこの自己組み立てにより,ユニークなねじれた構造が生まれます.

さらに関連する動画

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

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

関連する実験動画

Last Updated: Jun 17, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

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

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

科学分野:

  • ポリマーサイエンスの科学
  • 材料科学 材料科学とは
  • 超分子化学 超分子化学

背景:

  • チラルブロックコポリマー (BCP*) は,ユニークな自己組み立て能力を提供します.
  • BCP*からヘリクルアーキテクチャを設計することは,材料科学における重要な課題です.
  • キラル相互作用の理解は,ポリマー形態の制御に不可欠です.

研究 の 目的:

  • 螺旋構造の製造のためのキラルブロックコポリマーを設計・研究する.
  • 新しい自己組み立ての螺旋形の相を発見し,特徴づけること.
  • キラルBCPの相行動と安定性を確立するために*.

主な方法:

  • ポリ・チレン・ビ・ポリ・リ・ラクチド (PS-PLLA) キラルブロック共ポリマーの合成.
  • 自己組み立てナノ構造物の直接視覚化のための電子トモグラフィー.
  • 加熱研究によるフェーズ図の決定.
  • キラル効果を定量化するための相互作用パラメータの推定.

主要な成果:

  • PS-PLLA BCP*でP622対称性を持つ新しい螺旋相 (H*) の発見
  • PSマトリックス内の六角に詰め込まれ,数字の間のPLLAヘリカルマイクロドメインの直接可視化.
  • PS-PLLA BCPs*の段階図の作成について.
  • H* からシリンダーとジロイドの相への相変化の観測により,H* が転移性相であることを示す.

結論:

  • チラルブロックコポリマーは,新しい螺旋構造に自己組み立てることができます.
  • H*段階は,キラルBCPの自己組み立てを理解する上で重要な進歩を表しています.
  • チラルの相互作用は,ブロックコポリマーの不適合性と形態学に大きな影響を及ぼし,先進的な材料設計の経路を提供します.