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Copolimeros de bloque cristalino-cristalino de poli ((3-hexiltiofeno) regioregular y polietileno por polimerización
Christopher P Radano1, Oren A Scherman, Natalie Stingelin-Stutzmann
1Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Journal of the American Chemical Society
|September 8, 2005
Resumen
Los investigadores sintetizaron nuevos copolímeros de bloque cristalino-cristalino de poli-hexiltiofeno (P3HT) y polietileno (PE). Estos materiales estables y resistentes a los disolventes son los primeros de su tipo, abriendo nuevas vías para los polímeros aislantes semiconductores.
Área de la Ciencia:
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- Ciencia de los materiales Ciencia de los materiales.
- Electrónica orgánica y electrónica orgánica.
Sus antecedentes:
- Los copolímeros de bloque ofrecen propiedades únicas al combinar bloques de polímeros distintos.
- Regioregular poli{3-hexiltiofeno) (P3HT) es un polímero semiconductor bien establecido.
- El polietileno (PE) es un polímero aislante ampliamente utilizado.
Objetivo del estudio:
- Para sintetizar nuevos copolímeros de bloque cristalino-cristalino de P3HT y PE.
- Explorar el potencial de la combinación de bloques cristalinos semiconductores y aislantes.
- Desarrollar nuevos materiales para aplicaciones electrónicas orgánicas.
Principales métodos:
- Síntesis a través de la polimerización de la metátesis de apertura de anillo (ROMP) utilizando P3HT. terminado en olefina.
- La polimerización por transferencia de cadena en presencia de ciclocteno.
- Hidrogenación del bloque de poli (ciclocteno) para obtener polietileno.
- Caracterización mediante RMN de 1H, calorimetría de barrido diferencial (DSC) y dispersión de rayos X de gran angular (WAXS).
Principales resultados:
- Síntesis exitosa de copolímeros de bloque P3HT-PE de alto peso molecular, cristalino y cristalino.
- Los copolímeros resultantes muestran una excelente estabilidad térmica.
- Los materiales demuestran resistencia a los disolventes en condiciones ambientales.
- Se informó por primera vez de copolímeros de bloque cristalino-cristalino semiconductor aislante.
Conclusiones:
- Los copolímeros de bloque P3HT-PE desarrollados representan una nueva clase de materiales.
- Estos materiales combinan las propiedades del P3HT semiconductor y el PE aislante en una arquitectura cristalina.
- Este trabajo sienta las bases para futuras investigaciones en copolímeros de bloque cristalino para aplicaciones avanzadas.
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