Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.5K
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...
3.5K
Radical Chain-Growth Polymerization: Chain Branching01:17

Radical Chain-Growth Polymerization: Chain Branching

1.9K
The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
1.9K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

7.8K
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.
7.8K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.7K
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...
2.7K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

2.5K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this...
2.5K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.0K
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...
2.0K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Amylopectin-<i>g</i>-Poly(Acrylic Acid): Synthesis and Application as Reduction Agent for In Situ Formation of Gold Nanoparticles.

Polymers·2026
Same author

Superhydrophilic zwitterionic poly(ethyl methacrylate)-<i>b</i>-poly(carboxybetaine methacrylate) copolymers with highly stable self-assemblies in physiological media.

RSC advances·2026
Same author

Linear Amphiphilic P(BzMA-co-DMAEMA) Statistical Copolymers: Synthesis via RAFT Polymerization and Formation of Nanoassemblies in Aqueous Media.

Polymers·2026
Same author

Ex Vivo Characterization and In Vivo Nasal Delivery of Ropinirole-Loaded PEO-b-PCL/Tween 80/β-Cyclodextrin Systems in C57BL/6J Mice.

Molecules (Basel, Switzerland)·2026
Same author

Effect of Ion Specificity on the Interfacial Behavior of Amphiphilic Hyperbranched Copolymer H-P(OEGMA-<i>co</i>-LMA).

The journal of physical chemistry. B·2026
Same author

Self-Assembled (Nano)Structures of Human Serum Albumin with Thermoresponsive Chitosan-<i>g</i>-PNIPAM Graft Copolymer.

Polymers·2026

相关实验视频

Updated: Jun 26, 2025

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
10:54

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization

Published on: June 19, 2015

9.7K

使用RAFT聚合方法来创建分支和纳米凝类型的共聚物.

Athanasios Skandalis1, Theodore Sentoukas2, Dimitrios Selianitis1

  • 1Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece.

Materials (Basel, Switzerland)
|May 11, 2024
PubMed
概括

本综述涵盖了使用可逆添加碎片链转移 (RAFT) 聚合制造制造分支共聚合物和纳米凝的最新进展,这是一种多功能技术,可以精确控制聚合物结构和特性.

关键词:
在RAFT的聚合物化过程中,有分支的,有分支的聚合物的共聚物.接种器 接种器 移植器这是一个超分支的超分支机构.纳米凝是一种纳米凝.星星的星星的星星的星星的星星

更多相关视频

Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst
07:39

Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst

Published on: June 8, 2016

9.5K
Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
06:56

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions

Published on: October 10, 2013

39.7K

相关实验视频

Last Updated: Jun 26, 2025

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
10:54

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization

Published on: June 19, 2015

9.7K
Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst
07:39

Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst

Published on: June 8, 2016

9.5K
Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
06:56

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions

Published on: October 10, 2013

39.7K

科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 可逆失活激素聚合 (RDRP) 技术可以提高对聚合物合成的控制.
  • 可逆添加碎片链转移 (RAFT) 聚合是一种著名的RDRP方法,以其多功能性和温和条件而闻名.
  • 分支聚合物和纳米凝代表了复杂的宏分子架构,具有多样化的应用.

研究的目的:

  • 审查合成分支共聚物和纳米凝的最新进展.
  • 详细介绍各种分支聚合物架构和纳米凝的合成路径和特性.
  • 突出RAFT聚合在创建这些复杂结构的优点.

主要方法:

  • 使用可逆添加-碎片化链转移 (RAFT) 聚合.
  • 探索各种单体相容性和聚合条件.
  • 分析由此产生的聚合物架构,包括星形,接种和超分支聚合物,以及纳米凝.

主要成果:

  • 拉夫特聚合能对摩尔质量和狭窄的摩尔质量分布提供了很好的控制.
  • 多种分支共聚物和纳米凝架构可以高精度合成.
  • 这篇综述详细介绍了特定的合成策略和由此产生的溶液性质.

结论:

  • 飞机聚合是一种强大的工具,用于复杂的分支聚合物和纳米凝的受控合成.
  • RAFT的多功能性使得可以为各种应用程序创建量身定制的宏分子架构.
  • 继续研究RAFT聚合物可能会导致材料科学领域的进一步创新.