Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.0K
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,...
2.0K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

7.7K
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.
7.7K
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
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

2.2K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.2K
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
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

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Upcycling Commodity Polymers into Semiconductors by Sequential Grafting of Aromatic Units through Regioselective Iodination and Living Suzuki-Miyaura Catalyst-Transfer Polymerization.

Journal of the American Chemical Society·2026
Same author

Response to "Comment on 'Effective spin Hamiltonians for the quantum-rotor tunneling problem in pulse EPR'" [J. Chem. Phys. 164, 187101 (2025)].

The Journal of chemical physics·2026
Same author

Beyond the Chemical Recycling of Polymethacrylates: Depolymerization of Polymethacrylamides.

Chimia·2026
Same author

Topology-Dependent Coke Formation in the Catalytic Pyrolysis of Phenol Over HFAU and HZSM-5 Zeolites.

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

Characterization of strongly hyperfine-split protons by DNP.

Physical chemistry chemical physics : PCCP·2026
Same author

Characterization of flexible RNA binding by tandem RNA recognition motifs through integrative ensemble modelling.

Nucleic acids research·2026
Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026
Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026
Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026
Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026
Same journal

Retraction.

Science (New York, N.Y.)·2026
Same journal

Making time.

Science (New York, N.Y.)·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: May 27, 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

Despolimerización por luz visible de los polimetacrilatos comerciales

Hyun Suk Wang1, Mikhail Agrachev2, Hongsik Kim3

  • 1Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich, Switzerland.

Science (New York, N.Y.)
|February 20, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio introduce un nuevo método para la despolimerización de plásticos comunes como los polimetacrilatos utilizando luz visible. Este avance ofrece una solución de reciclaje escalable y eficiente para los residuos plásticos.

Más Videos Relacionados

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

11.6K
Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
12:07

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Published on: April 16, 2018

13.3K

Videos de Experimentos Relacionados

Last Updated: May 27, 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

11.6K
Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
12:07

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Published on: April 16, 2018

13.3K

Área de la Ciencia:

  • Química de los polímeros
  • Ciencia de los materiales sostenibles
  • Química ecológica

Sus antecedentes:

  • Los residuos plásticos representan un desafío medioambiental importante.
  • Los métodos actuales de despolimerización a menudo requieren polímeros especializados que no son adecuados para el uso comercial.
  • El reciclaje eficiente de polímeros de vinilo con columna vertebral de carbono-carbono sigue siendo difícil.

Objetivo del estudio:

  • Desarrollar un método de despolimerización aplicable a los polímeros comerciales.
  • Para permitir el reciclaje de los polimetacrilatos activado por luz visible.
  • Abordar las limitaciones de las tecnologías de reciclaje de plástico existentes.

Principales métodos:

  • Despolimerización iniciada por la cadena principal provocada por la luz visible.
  • Generación in situ de radicales de cloro a partir de disolventes
  • Aplicación a los polimetacrilatos comerciales con impurezas.

Principales resultados:

  • Se ha logrado una despolimerización casi cuantitativa (> 98%) para los polimetacrilatos.
  • Método eficaz independientemente de la vía de síntesis del polímero, el grupo final o el peso molecular (hasta 1,6 millones de daltones).
  • Se ha demostrado el éxito de las despolimerizaciones a escala multigrama.

Conclusiones:

  • La despolimerización activada por luz visible ofrece una vía versátil y general para el reciclaje de polímeros comerciales.
  • El método supera los desafíos asociados con la despolimerización de las columnas vertebrales de polímeros estables.
  • Este enfoque ofrece una solución práctica para la gestión de residuos plásticos.