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Copolimerización simultánea de adición catiónica de vinilo y apertura de anillos utilizando B(C6F5) 3 como
Arihiro Kanazawa1, Shokyoku Kanaoka, Sadahito Aoshima
1Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Journal of the American Chemical Society
|June 8, 2013
Resumen
La copolimización catiónica de éteres de vinilo alquilo y óxido de isobutileno produce copolímeros parecidos a varios bloques. El éxito depende de la elección del catalizador y la reactividad del monómero para reacciones cruzadas efectivas.
Área de la Ciencia:
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- La polimerización catiónica es la polimerización catiónica.
Sus antecedentes:
- Los éteres de vinilo alquilo y los éteres cíclicos son monómeros importantes.
- La polimerización catiónica es una técnica versátil para la síntesis de polímeros.
Objetivo del estudio:
- Para investigar la copolimización concurrente de éteres de vinilo alquilo y óxido de isobutileno.
- Para explorar la formación de copolímeros parecidos a varios bloques utilizando un catalizador catiónico.
Principales métodos:
- Adición de vinilo catiónico y polimerización de apertura de anillo utilizando catalizador B(C6F5) 3.
- Análisis de resonancia magnética nuclear (RMN) para la caracterización estructural.
- Hidrólisis ácida para confirmar la composición y estructura del copolímero.
Principales resultados:
- Exitosa copolimización simultánea de éteres de vinilo alquilo y óxido de isobutileno.
- Demostración de las reacciones cruzadas entre vinilo y monómeros cíclicos.
- Formación de estructuras de copolímero de tipo multibloque confirmadas por RMN e hidrólisis.
Conclusiones:
- La polimerización catiónica permite la síntesis de copolímeros parecidos a varios bloques de diferentes tipos de monómeros.
- La elección del catalizador y la reactividad del monómero es crucial para lograr una copolimización exitosa.
- Este método ofrece un camino hacia nuevas arquitecturas poliméricas.
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