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

Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

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,...
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,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Aluminum Cross-Linked Carboxylated Nanocellulose Hydrogels with Enhanced Antifreezing Properties.

ACS omega·2026
Same author

Acute effects of foam rolling versus passive rest following a single bout of explosive squat jump exercise.

Scientific reports·2026
Same author

High Desalination Performance of Polyamide Composite Reverse Osmosis Membranes Based on Integrated Diamine Monomers.

Membranes·2026
Same author

Acute effects of foam rolling vs. passive rest following a single bout of complex contrast training.

European journal of applied physiology·2026
Same author

Metamaterials from Plasma-Treated Block Copolymer Monolith.

ACS applied materials & interfaces·2026
Same author

Pressure dependence of surface tension of polymer melts under high vacuum.

Nature communications·2026
Same journal

A Ni-Mediated Cross-Coupling Approach to Deuterated <sup>18</sup>F- Fluoromethylated (Hetero)arenes.

Journal of the American Chemical Society·2026
Same journal

Efficient Light-Driven CO<sub>2</sub> Capture and Reversible Release Enabled by Metastable Photoacid-Decorated Metal-Organic Frameworks.

Journal of the American Chemical Society·2026
Same journal

In Situ Raman Spectroscopy Reveals the Dynamic Evolution and Ethanol Dependence of SEI Structure in Li-Mediated N<sub>2</sub> Reduction Reaction.

Journal of the American Chemical Society·2026
Same journal

Solvent Esterification and Stoichiometric Control in Ambient-Grown FAPbI<sub>3</sub> Single-Crystal Solar Cells.

Journal of the American Chemical Society·2026
Same journal

Unlocking Azulene Functionalization via Strain-Induced Azulyne Intermediates.

Journal of the American Chemical Society·2026
Same journal

An Oxazine-Locked Covalent Organic Framework by a Tandem Pinner/Schiff Base Reaction for Hydrogen Peroxide Photosynthesis.

Journal of the American Chemical Society·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: Jun 17, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

Bloquear los copolímeros con un giro.

Rong-Ming Ho1, Yeo-Wan Chiang, Chun-Ku Chen

  • 1Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan. rmho@mx.nthu.edu.tw

Journal of the American Chemical Society
|December 24, 2009
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores descubrieron una nueva fase helicoidal (H*) en los copolímeros de bloque quiral (BCP*). Este autoensamblaje de BCPs de poliestireno-b-poliestireno-lactido (PS-PLLA) crea arquitecturas retorcidas únicas.

Más Videos Relacionados

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

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

Videos de Experimentos Relacionados

Last Updated: Jun 17, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 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

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

Área de la Ciencia:

  • La ciencia de los polímeros es la ciencia de los polímeros.
  • Ciencia de los materiales Ciencia de los materiales.
  • Química supramolecular de las moléculas.

Sus antecedentes:

  • Los copolímeros de bloque quiral (BCP*) ofrecen capacidades únicas de autoensamblaje.
  • El diseño de arquitecturas helicoidales a partir de BCP* es un desafío clave en la ciencia de los materiales.
  • Comprender las interacciones quirales es crucial para controlar la morfología del polímero.

Objetivo del estudio:

  • Diseñar e investigar copolímeros de bloque quiral para la fabricación de arquitecturas helicoidales.
  • Descubrir y caracterizar nuevas fases helicoidales autoensambladas.
  • Para establecer el comportamiento de fase y la estabilidad de los BCPs quirales*.

Principales métodos:

  • Síntesis de copolímeros de bloque quiral de poli (estireno) -b-poli (l-lactido) (PS-PLLA). copolímeros de bloque quiral de poli (estireno) -b-poli (l-lactido) (PS-PLLA). copolímeros de bloque quiral de poli (estireno) -b-poli (l-lactido) (PS-PLLA). copolímeros de bloque quiral de poli (estireno) -b-poli (l-lactido) (PS-PLLA). copolímeros de bloque quiral de poli (estireno) -b-poli (l-lactido) (PS-PLLA). copolímeros de bloque quiral de poli (estireno) -b-poli (l-lactido)
  • Tomografía electrónica para la visualización directa de nanoestructuras autoensambladas.
  • Determinación del diagrama de fases a través de estudios de recocido.
  • Estimación de los parámetros de interacción para cuantificar los efectos quirales.

Principales resultados:

  • Descubrimiento de una nueva fase helicoidal (H*) con simetría P622 en BCPs PS-PLLA*.
  • Visualización directa de microdominios helicoidales PLLA empacados hexagonalmente y interdigitados dentro de una matriz PS.
  • Establecimiento del diagrama de fases de los BCPs* de PS-PLLA.
  • Observación de las transiciones de fase de H* a las fases cilíndrica y tiroidea, indicando que H* es una fase metastable.

Conclusiones:

  • Los copolímeros de bloque quiral pueden autoensamblarse en nuevas arquitecturas helicoidales.
  • La fase H* representa un avance significativo en la comprensión del autoensamblaje quiral del PCB.
  • Las interacciones quirales influyen significativamente en la incompatibilidad y morfología del copolímero de bloque, ofreciendo vías para el diseño de materiales avanzados.