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

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
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

1.9K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.9K
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
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: Architecture01:14

Polymer Classification: Architecture

2.6K
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...
2.6K

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Synthesis of poly(ester disulfide)s from S<sub>8</sub>-involved step-growth addition polymerization at ambient temperature.

Nature communications·2026
Same author

Iron-Catalyzed Synthesis of Unsymmetrical Disilanes.

Journal of the American Chemical Society·2026
Same author

A Versatile Platform for Recyclable Polyesters: Alternating Copolymerization of Aldehydes (or Their Derivatives) with Cyclic Anhydrides.

Accounts of chemical research·2025
Same author

Intramolecular Hydrogen-Bonding Catalyst/Initiator for Precise Synthesis of Polycarbonates and Copolymers with Unprecedented Activity and Molecular Weights.

Angewandte Chemie (International ed. in English)·2025
Same author

Nonconjugated Polyesters Emitting Full-Color Clusteroluminescence.

Accounts of chemical research·2025
Same author

Detection of β-transition in polyesters <i>via</i> clusteroluminescence.

Materials horizons·2025

Video Experimental Relacionado

Updated: Jun 5, 2025

Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
09:22

Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications

Published on: August 28, 2015

19.1K

Polímeros autodegradables: degradación completa sin ningún disparador, rendimiento ajustable y aplicaciones

Shuohong Chen1, Chengjian Zhang1, Xinghong Zhang1

  • 1State Key Laboratory of Biobased Transportation Fuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.

Journal of the American Chemical Society
|December 4, 2024
PubMed
Resumen

Se sintetizaron nuevos polímeros degradables para la administración de fármacos. Estos polímeros se autodegradan completamente sin desencadenantes, ofreciendo tasas de degradación ajustables para aplicaciones biomédicas.

Más Videos Relacionados

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

13.4K
Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro
14:49

Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro

Published on: April 15, 2022

5.0K

Videos de Experimentos Relacionados

Last Updated: Jun 5, 2025

Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
09:22

Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications

Published on: August 28, 2015

19.1K
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

13.4K
Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro
14:49

Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro

Published on: April 15, 2022

5.0K

Área de la Ciencia:

  • Química de los polímeros
  • Ciencia de los biomateriales

Sus antecedentes:

  • El desarrollo de polímeros degradables para uso biomédico es complejo.
  • Los principales retos incluyen garantizar la no toxicidad, la degradación completa y las propiedades adecuadas del material.

Objetivo del estudio:

  • Para sintetizar nuevos polímeros degradables para una administración sostenida de fármacos.
  • Explorar sus mecanismos únicos de degradación y propiedades para aplicaciones biomédicas.

Principales métodos:

  • Copolimización alterna de anhídridos cíclicos y bases de Schiff.
  • Caracterización de la estructura del polímero, incluidas las topologías cíclicas y los grupos de ésteres/peptoides en cadena.
  • Evaluación del comportamiento de autodegradación bajo diferentes condiciones.

Principales resultados:

  • Se han sintetizado con éxito polímeros versátiles y degradables sin catalizadores.
  • Se ha demostrado una autodegradación única sin desencadenantes externos.
  • Se alcanzan tasas de degradación ajustables de horas a meses, controladas por la estructura del polímero y la temperatura.
  • Seguridad y eficacia del polímero validadas mediante ensayos de viabilidad celular y estudios de liberación de fármacos in vitro/in vivo.

Conclusiones:

  • Los nuevos polímeros degradables son prometedores para la administración sostenida de fármacos.
  • Sus propiedades inherentes de autodegradación y ajustabilidad los hacen adecuados para aplicaciones biomédicas.
  • Las investigaciones adicionales pueden explorar diversas aplicaciones basadas en estos sistemas de polímeros degradables únicos.