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Películas reutilizables de polihidroxiuretano con redes acetales reversibles obtenidas de carbonatos cíclicos de seis
Hiroyuki Matsukizono1, Takeshi Endo1
1Molecular Engineering Institute, Kindai University , 11-6 Kayanomori, Iizuka, Fukuoka 820-8555, Japan.
Journal of the American Chemical Society
|January 10, 2018
Resumen
Se han creado nuevas películas reutilizables de poli (acetal-hidroxiuretano) utilizando carbonatos cíclicos multifuncionales. Estos materiales ofrecen propiedades ajustables y se pueden reformar, mostrando el potencial para aplicaciones de polímeros sostenibles.
Área de la Ciencia:
- Química de los polímeros
- Ciencias de los materiales
- Síntesis orgánica
Sus antecedentes:
- El desarrollo de materiales poliméricos sostenibles y reciclables es crucial.
- Los polímeros tradicionales a menudo carecen de métodos eficientes de reciclaje o reprocesamiento.
- Los enlaces acetálicos ofrecen el potencial para redes de polímeros reversibles.
Objetivo del estudio:
- Para sintetizar nuevos carbonatos cíclicos multifuncionales (6-CCs) con estructuras acetales.
- Fabricar películas reutilizables de polietileno-hidroxiuretano (PAHU) utilizando estos 6-CC.
- Investigar las propiedades y la reelaborabilidad de las películas PAHU resultantes.
Principales métodos:
- Síntesis sin fosgeno de 6-CCs multifuncionales a partir de di ((trimetilolpropano) protegido y aldehídos multifuncionales.
- Reacción de poliadición entre 6-CC y diaminas en DMF para formar películas de PAHU.
- Caracterización de las propiedades de la película, incluida la transparencia, la flexibilidad y la reelaborabilidad a través de la catálisis ácida.
Principales resultados:
- Se han sintetizado con éxito 6-CCs multifuncionales que contienen enlaces acetálicos.
- Películas fabricadas transparentes y flexibles de PAHU en red.
- Se ha demostrado la capacidad de reelaboración de las películas PAHU a través de la escisión catalizada por ácido y la reformación de los enlaces acetálicos.
- Se consigue una reformación reproducible de las películas, especialmente de las de alta funcionalidad 6-CC, conservando las propiedades mecánicas.
Conclusiones:
- Los 6-CC multifuncionales proporcionan una ruta viable para las películas PAHU reutilizables.
- La reversibilidad catalizada por ácido del enlace acetal permite un reprocesamiento eficiente del material.
- Estos hallazgos contribuyen al desarrollo de materiales poliméricos reciclables y sostenibles.
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