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

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

4.1K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
4.1K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

3.0K
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...
3.0K
Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

3.5K
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...
3.5K
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
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
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

4.1K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
4.1K

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

Sub-10 nm Structures Constructed by a Rod-Coil Block Copolymer.

Macromolecular rapid communications·2025
Same author

Tough fiber-reinforced composite ionogels with crack resistance surpassing metals.

Nature communications·2025
Same author

Double gyroid-structured electrolyte based on an azobenzene-containing monomer and its polymer.

Soft matter·2024
Same author

Impact of self-assembled structure on ionic conductivity of an azobenzene-containing electrolyte.

RSC advances·2024
Same author

Spin-Frustrated Trisradical Trication of PrismCage.

Journal of the American Chemical Society·2023
Same author

Strain-Stiffening Ionogel with High-Temperature Tolerance via the Synergy of Ionic Clusters and Hydrogen Bonds.

ACS applied materials & interfaces·2023

関連する実験動画

Updated: Feb 28, 2026

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
09:02

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

12.9K

トリブロックコポリマーにおける結晶化と微相分離の競合とカップリング

Shichu Yang1, Zhihao Shen1, Xing-He Fan1

  • 1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China.

Macromolecular rapid communications
|February 27, 2026
PubMed
まとめ
この要約は機械生成です。

液晶ブロックと半結晶ブロックを持つブロックコポリマーは、ラメラ構造と六方構造に自己組織化します。ポリマー結晶化はナノ構造形成に大きく影響し、ユニークな相転移を引き起こします。

キーワード:
ブロックコポリマー結晶化低次秩序転移微相分離半結晶性ポリマー

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

8.4K
Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
12:04

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

9.5K

関連する実験動画

Last Updated: Feb 28, 2026

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
09:02

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

12.9K
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

8.4K
Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
12:04

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

9.5K

科学分野:

  • 高分子化学
  • 材料科学
  • ナノテクノロジー

背景:

  • ブロックコポリマー（BCP）は多様なナノ構造に自己組織化します。
  • 液晶（LC）ポリマーと半結晶性ポリマーを組み込むことで、BCPの自己組織化が変化します。
  • メソゲンジャケット型LCポリマー（MJLCP）はユニークな特性を提供します。

研究 の 目的:

  • ポリジメチルシロキサン（PDMS）、ポリ（L-乳酸）（PLLA）、およびPMVBP液晶ブロックを含む新規BCPを合成および特徴付けました。
  • PLLA結晶化がBCPナノ構造形成に及ぼす影響を調査しました。
  • 温度依存性の相挙動と相転移を探求しました。

主な方法:

  • トリブロックコポリマー（PDMS-b-PLLA-b-PMVBP）の合成。
  • 構造解析のための温度依存性小角X線散乱（SAXS）。
  • 相転移とナノ構造進化の解析。

主要な成果:

  • ジブロックコポリマーPLLA-b-PMVBPは、溶解度パラメータが類似しているため、秩序だったナノ構造を示しませんでした。
  • トリブロックコポリマーPDMS-b-PLLA-b-PMVBPは、常温でラメラ（LAM）、高温で六方（HEX）構造を示しました。
  • PLLAの結晶化はBCPの自己組織化に大きく影響し、微相分離と競合またはカップリングする可能性があります。
  • まれな低次秩序転移（LDOT）が観察されました。

結論:

  • ポリマー結晶化と微相分離の間の相互作用がBCPナノ構造を支配します。
  • 温度誘起構造転移（LAMからHEXへ）が観察されます。
  • LDOTを含む新規相挙動は、官能性ブロックを持つBCP自己組織化の複雑さを浮き彫りにします。