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

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
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.4K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.4K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

2.8K
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...
2.8K
Conformations of Cycloalkanes02:29

Conformations of Cycloalkanes

11.8K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3  hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
11.8K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.1K
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,...
2.1K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.4K
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...
3.4K

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

Shape Memory Elastomers: A Review of Molecular Structures, Stimulus Mechanisms, and Emerging Applications.

Polymer science & technology (Washington, D.C.)·2026
Same author

Reversibly Interlocked Macromolecular Networks Unlock a Stretchable, Self-Healing Polymer With Ultra-High White-Light Quantum Yield.

Macromolecular rapid communications·2026
Same author

Reversibly interlocked networks defy the strength-stiffness-damping trade-off for adaptive structural adhesives.

Journal of colloid and interface science·2026
Same author

Synthesis of polyphenol nanofibers <i>via</i> template-free oxidative polymerization of ellagic acid.

Chemical communications (Cambridge, England)·2025
Same author

Systematic profiling and bioactivity evaluation of Jiuzao from light flavor baijiu: A by-product rich in bioactive compounds.

Food chemistry·2025
Same author

Ultra-Long Life Solid-State Lithium Metal Batteries Enabled by 3D-Printing of Integrated Porous Cathode/Composite Polymer Electrolyte with Dynamic Covalent Bonds.

Advanced materials (Deerfield Beach, Fla.)·2025

相关实验视频

Updated: Jun 21, 2025

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
06:16

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

5.7K

高度灵活但不敏感应变的合聚合物聚合物.

Wen Wen Deng1, Ze Ping Zhang1, Min Zhi Rong1

  • 1Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GD HPPC Lab, IGCME, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China. zhangzp8@mail.sysu.edu.cn.

Materials horizons
|July 10, 2024
PubMed
概括

这项研究开发了使用可逆互锁宏分子网络 (RILNs) 的可调节电气和机械性能的自愈导电聚合物薄膜. 这些先进的材料在变形和重复使用过程中保持稳定的导电性,非常适合灵活的电子产品.

更多相关视频

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

6.9K
High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain
09:20

High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain

Published on: June 2, 2019

7.8K

相关实验视频

Last Updated: Jun 21, 2025

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
06:16

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

5.7K
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

6.9K
High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain
09:20

High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain

Published on: June 2, 2019

7.8K

科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 导电聚合物 导电聚合物

背景情况:

  • 开发具有优良电气性能,机械强度和自我修复能力的内在导电聚合物是一项挑战.
  • 可逆互锁的宏分子网络 (RILNs) 提供了一种有希望的方法来克服这些局限性.

研究的目的:

  • 创建一种具有增强电气和机械性能,包括自我愈合能力的新型导电聚合物复合材料.
  • 为了证明这些材料在各种灵活的电子应用中具有可调的性质.

主要方法:

  • 聚3,4-乙烯二氧化 (PEDOT) 与柔性多硫酸网络 (Diels-Alder交叉连接) 和刚性聚氨酸网络 (Schiff基交叉连接) 结合在一起.
  • 为了调整复合物的特性,PEDOT含量变化了 (1.48-22.24重%) .

主要成果:

  • 由此产生的PEDOT/RILNs薄膜具有可调节的电导率 (59.3-980.5 S cm-1) 和机械强度 (8.4-81.6 MPa, 44.5-411.0%延长).
  • 在大型延伸,重复拉伸 (1500周期) 和曲 (106周期) 期间观察到异常的导电稳定性.
  • 由于可逆共价键,这些材料证明了机械和电性能的自主恢复.

结论:

  • 提出的PEDOT/RILNs方法成功地解决了对灵活电子的相互矛盾要求,产生了具有优越和可调节性质的材料.
  • 展示的自动供电传感器凸显了这些先进的导电聚合物在下一代电子设备中的实际潜力.