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

Radical Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

2.4K
Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
2.4K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

2.6K
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...
2.6K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.3K
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...
2.3K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

7.9K
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.
7.9K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

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

2.6K
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...
2.6K

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

Interlayer Valley Coupling and Hybridized Excitons in Twisted van der Waals Bilayers With Broken Translational Symmetry.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Ultra-stable Flexible Thermal Sensing Operating from 20 to 1273 K Enabled by the Directly Grown Mo<sub>2</sub>C Patterns on Flexible Substrates.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Flexible and Thermally Regulable High-Temperature Sensing Electronics.

Nano letters·2026
Same author

Achieving Multimodal Trainable Self-Strengthening Elastomers Through Mechano-Oxidative Synergistic Induced Crosslinking.

Angewandte Chemie (International ed. in English)·2026
Same author

Laser-induced selective metallization of conductive patterns on silicone via copper carbonate hydroxide coating.

Microsystems & nanoengineering·2026
Same author

Scalable Growth of Quasi-1D TiS<sub>3</sub> Nanoribbons for High-Temperature Flexible Strain Sensor.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

Gas-Responsive Metal-Organic Frameworks for Adaptive Thermal Energy Storage with Tunable Charge-Discharge Temperatures.

Journal of the American Chemical Society·2026
Same journal

Engineering a Thiamine-Dependent Benzoylformate Decarboxylase for Stereodivergent Radical C(sp<sup>3</sup>)-C(sp<sup>3</sup>) Bond Formation.

Journal of the American Chemical Society·2026
Same journal

Accelerated Directional Proton-Coupled Electron Transfer Enabled by Intrinsic Dipole Field in Biomimetic α-Helical Structure.

Journal of the American Chemical Society·2026
Same journal

Alternating Current-Driven Hydrogen Isotope Labeling of Aliphatic Amines Using 1,3-Propanedithiol as an Efficient Hydrogen Atom Transfer Reagent.

Journal of the American Chemical Society·2026
Same journal

Two-Dimensional van der Waals Polar Metal MoOBr<sub>2</sub>.

Journal of the American Chemical Society·2026
Same journal

Negatively Curved Chiral Bilayer Nanographene.

Journal of the American Chemical Society·2026
查看所有相关文章

相关实验视频

Updated: Jul 9, 2025

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

大分子工程多功能室温光聚合物通过可逆失活激光聚合

Ruoqing Zhao1, Chen Wang1, Keer Huang1

  • 1Frontiers Science Center for Flexible Electronics (FSCFE) & Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University, Xi'an 710072, China.

Journal of the American Chemical Society
|November 30, 2023
PubMed
概括
此摘要是机器生成的。

研究人员为先进的室温光聚合物 (RTP) 开发了新的渐变共聚物 (GCP). 这些功能性材料具有可调节的机械性能和自我修复能力,而无需牺牲光辐射.

更多相关视频

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
06:49

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst

Published on: April 22, 2016

11.8K
3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization
07:28

3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization

Published on: February 18, 2022

3.8K

相关实验视频

Last Updated: Jul 9, 2025

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
Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
06:49

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst

Published on: April 22, 2016

11.8K
3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization
07:28

3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization

Published on: February 18, 2022

3.8K

科学领域:

  • 聚合物科学与工程
  • 材料化学
  • 光物理学

背景情况:

  • 开发具有可控结构和多种功能的室温光聚合物 (RTP) 是一个挑战.
  • 现有的RTP聚合物往往缺乏可调整的机械性能或自我修复能力.

研究的目的:

  • 合成具有精确定义的宏分子架构和增强功能的RTP聚合物.
  • 创建具有可调整的伸展性,内在愈合性和持续的RTP性能的材料.

主要方法:

  • 使用可逆失活基聚合来创建渐变共聚合物 (GCP) 架构.
  • 具有控制异质性的工程 GCP,结合硬和灵活的细分.
  • 研究了多相纳米结构的自我组装,并描述了机械和光物理性质.

主要成果:

  • 实现可调节的机械性能,在断裂时的延长率从5.0%到221.7%,Young的模量从0.5到225.0MPa.
  • 证明了卓越的RTP性能和内在的治愈能力.
  • 在拉伸下保持光辐射,展示多功能功能.

结论:

  • 渐变共聚合物架构为设计先进的RTP聚合物提供了多功能平台.
  • 开发的材料具有可调节的机械性能,自我愈合和强大的光的独特组合.
  • 这项工作为功能光材料在各种应用中开辟了新的途径.