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

Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.5K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.5K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.5K
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...
2.5K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.9K
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...
3.9K
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.3K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
2.3K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.2K
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...
2.2K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

3.0K
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 species into...
3.0K

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Contra-Thermodynamic α,β- to β,γ-Photodeconjugation of an Inert CO<sub>2</sub>-Derived δ-Lactone Enables Facile Ring-Opening Polymerization.

Journal of the American Chemical Society·2026
Same author

Radical Polyesters: Connecting Spacer Structure to Bulk Electrical Conductivity.

ACS macro letters·2026
Same author

Ring-Opening Copolymerization of a CO<sub>2</sub>/Butadiene-Derived Epoxide with CO<sub>2</sub> or Cyclic Anhydrides Leading to High CO<sub>2</sub> Content Polycarbonates and High <i>T</i><sub>g</sub> Polyesters.

ACS macro letters·2026
Same author

Understanding low-pressure CO<sub>2</sub> insertion chemistry in epoxide-CO<sub>2</sub> copolymerization catalysis.

Nature chemistry·2026
Same author

Function Meets Circularity: Metal-Ionomer Cross-Links Toughen and Recycle CO<sub>2</sub>‑Derived Polymers.

Macromolecules·2026
Same author

Better Material Properties and Faster Catalyzed Chemical Recycling for Poly(L-Lactide) Using a Simple Commercial Glycerol Ethoxylate Additive.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026

Video Experimental Relacionado

Updated: Oct 31, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

22.4K

Control de secuencia a partir de mezclas: catálisis de polimerización conmutada y aplicaciones futuras de materiales

Arron C Deacy1, Georgina L Gregory1, Gregory S Sulley1

  • 1Department of Chemistry, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, U.K.

Journal of the American Chemical Society
|June 30, 2021
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio introduce una nueva catálisis de polimerización conmutable para crear copolímeros sostenibles y de alto rendimiento. Este método permite un control preciso de la secuencia de bloques, lo que facilita el reciclaje y la degradación para aplicaciones de materiales avanzados.

Más Videos Relacionados

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
07:28

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization

Published on: November 27, 2015

13.4K
Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
05:48

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes

Published on: November 21, 2017

8.2K

Videos de Experimentos Relacionados

Last Updated: Oct 31, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

22.4K
Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
07:28

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization

Published on: November 27, 2015

13.4K
Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
05:48

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes

Published on: November 21, 2017

8.2K

Área de la Ciencia:

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

Sus antecedentes:

  • La creciente demanda de polímeros de alto rendimiento choca con la necesidad de sostenibilidad del ciclo de vida.
  • Los copolímeros con enlaces de éster, carbonato o éter ofrecen potencial para la degradación y el reciclaje debido a su química que favorece el equilibrio.
  • Los monómeros renovables o derivados de desechos pueden utilizarse para una producción de polímeros más sostenible.

Objetivo del estudio:

  • Presentar un método eficiente y ampliamente aplicable para la síntesis de copolímeros selectivos por secuencia de bloques.
  • Discutir los principios y el diseño del catalizador para la catálisis de polimerización conmutable.
  • Explorar la caracterización, las propiedades y las aplicaciones de los copolímeros resultantes.

Principales métodos:

  • Desarrollo de un sistema de catálisis de polimerización conmutable.
  • Utilizando un solo catalizador que cambia entre diferentes ciclos catalíticos.
  • Preparación de copolímeros selectivos por secuencia de bloques a partir de mezclas de monómeros.

Principales resultados:

  • Demostración de una vía eficiente y versátil para sintetizar copolímeros de bloque específicos.
  • Caracterización de las estructuras copoliméricas y la selectividad mediante herramientas avanzadas.
  • Exploración de diversas propiedades y aplicaciones, incluidos los elastómeros termoplásticos y las nanoestructuras autoensambladas.

Conclusiones:

  • La catálisis de polimerización conmutable ofrece un enfoque poderoso para la síntesis sostenible de copolímero.
  • El método desarrollado permite un control preciso de la arquitectura del copolímero.
  • Las futuras direcciones de investigación incluyen una mayor optimización del catalizador y aplicaciones ampliadas para estos materiales poliméricos avanzados.