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Videos de Conceptos Relacionados

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...
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,...
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...
Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...

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Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries
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Published on: September 6, 2012

La polimerización supramolecular a partir de polímeros de peine injertados con polipéptido.

Jing Wang1, Hua Lu, Ranjan Kamat

  • 1Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, USA.

Journal of the American Chemical Society
|July 19, 2011
PubMed
Resumen
Este resumen es generado por máquina.

Los científicos crearon nuevos polímeros de peine injertados con polipéptido para la polimerización supramolecular controlada. Estos polímeros sintéticos forman estructuras tubulares estables, parecidas a las proteínas, lo que hace avanzar el autoensamblaje macromolecular.

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Área de la Ciencia:

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

Sus antecedentes:

  • Las estructuras helicoidales y tubulares inspiradas en las proteínas impulsan la investigación de polímeros supramoleculares sintéticos.
  • Lograr la polimerización supramolecular controlada con grandes macromoléculas sintéticas es un desafío debido a las dificultades en la estructura monomérica y el control de la interacción.

Objetivo del estudio:

  • Para sintetizar polímeros de peine injertados con polipéptido.
  • Para utilizar interacciones secundarias sintonizables en solución para la polimerización supramolecular controlada.
  • Para crear estructuras supramoleculares tubulares estables, parecidas a las proteínas.

Principales métodos:

  • Síntesis de polímeros de peine injertados con polipéptido.
  • Exploración de las interacciones secundarias sintonizables en solución para la polimerización.
  • Caracterización de las resultantes estructuras supramoleculares (tubos).
  • Demostración de la aplicabilidad general utilizando nanopartículas de oro.

Principales resultados:

  • Síntesis exitosa de polímeros de peine injertados con polipéptido.
  • La polimerización supramolecular controlada se logra a través de interacciones secundarias sintonizables.
  • Formación de estructuras supramoleculares tubulares estables con dimensiones de cientos de nanómetros (diámetro) y decenas de micrómetros (longitud).
  • Aplicabilidad demostrada utilizando nanopartículas de oro injertadas con polipéptido.

Conclusiones:

  • Las interacciones intermoleculares altamente específicas entre los monómeros macromoleculares permiten el crecimiento cooperativo de polímeros supramoleculares.
  • La estrategia desarrollada permite la creación de polímeros supramoleculares sintéticos que imitan las superestructuras biológicas.
  • Este enfoque ofrece una plataforma versátil para diseñar conjuntos macromoleculares complejos.