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Isomerismo de valencia del polímero: poli (dewar-o-xileno) s
1Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States.
Journal of the American Chemical Society
|April 10, 2018
Resumen
Los investigadores han desarrollado un nuevo método para sintetizar polioxiileno (POX) utilizando un único polímero intermedio, el polioxiileno de Dewar (PDOX). Este nuevo enfoque ofrece una vía para POX de alto peso molecular y materiales reconfigurables.
Área de la Ciencia:
- Química de los polímeros
- Síntesis orgánica
- Ciencias de los materiales
Sus antecedentes:
- La síntesis de polioxileno (POX) es un reto debido a su estructura.
- Los métodos tradicionales para la producción de POX son a menudo ineficientes.
- El POX posee propiedades físicas potencialmente valiosas.
Objetivo del estudio:
- Desarrollar una nueva estrategia sintética para el poli-oxileno de alto peso molecular.
- Para explorar la formación y las propiedades de un polímero intermedio, el poli (Dewar-o-xylylene).
- Para investigar la isomerización del poli (dewar-o-xileno) en poli (o-xileno).
Principales métodos:
- Utilizando una estrategia de isómero de valencia con un monómero tensado, el dewar-o-xileno (DOX).
- Utilizando la polimerización de radicales libres para sintetizar el poli (dewar-o-xileno) (PDOX).
- Investigando la isomerización térmica y fotoinducida de PDOX a POX.
Principales resultados:
- Se sintetizó con éxito el poli-oxileno de alto peso molecular a través de PDOX.
- PDOX se formó con una alta densidad de unidades de benceno Dewar en su columna vertebral.
- Se demostraron transformaciones térmicas y fotoinducidas eficientes de PDOX a POX.
Conclusiones:
- Una nueva estrategia de isómero de valencia permite la síntesis de polímeros poli (o-xileno) desafiantes.
- El poli (Dewar-o-xylylene) intermedio facilita la producción eficiente de POX.
- Este método proporciona acceso a materiales reconfigurables con propiedades ajustables.
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