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

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

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

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...
Cycloaddition Reactions: Overview01:16

Cycloaddition Reactions: Overview

Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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...
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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 catalyst, high molecular...
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

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 generated carbocation,...
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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...

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Three-dimensional motion analysis of a total wrist prosthesis during the dart-throwing motion: a cadaveric study.

Medical engineering & physics·2026
Same author

A Decentralized, Academically Integrated Training Model for Rural General Practice in Japan: A Descriptive Program Evaluation.

Journal of general internal medicine·2026
Same author

Stage-Based Surgical Strategies and Outcomes for Preiser Disease: A Single-Center Experience.

Hand (New York, N.Y.)·2025
Same author

DA-Raf synergistically binds to the plasma membrane and Ras to suppress ERK signaling.

Life science alliance·2025
Same author

Generation of transchromosomic mice harboring HLA-A/B/C and human B2M via mouse artificial chromosome and triple BAC integration.

Scientific reports·2025
Same author

Long-Term Outcomes of Radial Shortening Osteotomy for Kienböck Disease: Minimum 20-Year Follow-Up Study.

The Journal of hand surgery·2025

Video Experimental Relacionado

Updated: Jul 3, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

Cicopolimerización controlada a través de la formación cuantitativa de anillos de 19 miembros.

Bungo Ochiai1, Yuuko Ootani, Takeshi Endo

  • 1Department of Polymer Science and Engineering, Faculty of Engineering, Yamagata University, Jonan 4-3-16, Yonezawa, Yamagata, Japan.

Journal of the American Chemical Society
|July 26, 2008
PubMed
Resumen

Este estudio detalla la ciclo polimerización de un nuevo monómero bis-metacrilato, formando un gran anillo de 19 miembros. Se emplearon técnicas de polimerización controlada para lograr la ciclización cuantitativa, destacando el papel de los efectos de enlace estérico e hidrógeno.

Más Videos Relacionados

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

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
11:42

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

Published on: June 20, 2019

Videos de Experimentos Relacionados

Last Updated: Jul 3, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

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

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
11:42

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

Published on: June 20, 2019

Área de la Ciencia:

  • Química de Polímeros La química de los polímeros es la química de los polímeros.
  • Síntesis orgánica La síntesis orgánica.
  • Ciencias Macromoleculares Ciencias Macromoleculares

Sus antecedentes:

  • La ciclo polimerización ofrece una ruta hacia nuevos polímeros cíclicos.
  • El control del tamaño del anillo en la polimerización es un desafío.
  • Los monómeros de bis-metacrilato pueden someterse a reacciones de ciclización.

Objetivo del estudio:

  • Para investigar la ciclo polimerización de un monómero específico de bis-metacrilato.
  • Comprender los factores que influyen en la formación de anillos grandes.
  • Para lograr la polimerización controlada y la ciclización cuantitativa.

Principales métodos:

  • Síntesis de un monómero bis-metacrilato a partir del trans-ciclohexanediol y el isocyanato de 2-methacryloyloxyethyl.
  • Reacción de ciclo polimerización. reacción de ciclo polimerización.
  • La polimerización de la transferencia de cadena de adición-fragmentación reversible (RAFT) mediante el uso de cumio dithiobenzoato.

Principales resultados:

  • La ciclo polimerización formó con éxito anillos de 19 miembros.
  • Los efectos estéricos del anillo de ciclohexano y la unión de hidrógeno influyeron en el tamaño del anillo.
  • La polimerización RAFT demostró una cinética de polimerización controlada.
  • Se logró la ciclización cuantitativa, apoyando la polimerización controlada.

Conclusiones:

  • La regulación estérica diseñada y la unión de hidrógeno pueden promover la formación de anillos inusualmente grandes en la ciclo polimerización.
  • La polimerización RAFT es efectiva para la ciclo polimerización controlada de este monómero.
  • El estudio proporciona información sobre la síntesis de polímeros macrocíclicos.