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Polimerización de apertura de anillo controlada por arquitectura para poli (disulfuro) covalente dinámico
Yun Liu1,2,3, Yuan Jia1,2,3, Qiong Wu2,3
1Joint Center for Energy Storage Research , Argonne National Laboratory , 9700 South Cass Avenue , Lemont , Illinois 60439 , United States.
Journal of the American Chemical Society
|October 12, 2019
Resumen
Los investigadores desarrollaron un nuevo método de polimerización de apertura de anillos para controlar la arquitectura de poli (disulfuro). Esta estrategia permite la síntesis de polímeros grandes y el reciclaje de monómeros, ampliando el potencial del material.
Área de la Ciencia:
- Química de los polímeros
- Ciencias de los materiales
Sus antecedentes:
- Los poli (disulfuro) son polímeros covalentes dinámicos con propiedades sintonizables.
- El control de la arquitectura del polímero (cíclico vs. lineal) es crucial para el rendimiento del material.
Objetivo del estudio:
- Desarrollar una estrategia para controlar la arquitectura de los poli (disulfuro) utilizando la polimerización de apertura de anillos.
- Para permitir la síntesis de polímeros grandes y facilitar el reciclaje de monómeros.
Principales métodos:
- Utilizando la polimerización de apertura de anillos con iniciadores de tiol de arilo para favorecer los polímeros cíclicos.
- El uso de iniciadores de tiol de alquilo para promover la formación de polímeros lineales.
- Lograr la despolimerización catalítica para la recuperación del monómero.
Principales resultados:
- Control demostrado de la arquitectura de poli (disulfuro) mediante la selección de iniciadores de tiol específicos.
- Polímeros de alto peso molecular sintetizados de hasta 630 kDa.
- Se ha logrado con éxito la despolimerización catalítica para el reciclaje de monómeros.
Conclusiones:
- La estrategia desarrollada ofrece un control preciso de la geometría y la longitud del polímero.
- Este avance permite una mejor caracterización de las relaciones estructura-propiedad en polímeros covalentes dinámicos.
- Amplía las aplicaciones potenciales de los poli (disulfuro) s en la ciencia de los materiales.
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