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Poliéster periódicamente clicable: estudio del plegamiento inducido por la auto-segregación intracatenaria, la

Joydeb Mandal¹, S Krishna Prasad, D S Shankar Rao

¹Department of Inorganic and Physical Chemistry, Indian Institute of Science , Bangalore-560012, India.

Journal of the American Chemical Society

|January 18, 2014

Resumen

Se sintetizaron nuevos poliésteres con distintos segmentos de alquilo y fluoroalquilo y se autoensamblaron en nanoestructuras lamelares únicas. Estos materiales ofrecen un control preciso sobre la morfología, lo que permite el desarrollo avanzado de polímeros nanoestructurados.

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.
Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

Los poliésteres son polímeros versátiles con propiedades ajustables.
Lograr una nanoestructura controlada en polímeros es crucial para los materiales avanzados.
La combinación de segmentos inmiscibles en columnas vertebrales de polímero puede conducir al autoensamblaje.

Objetivo del estudio:

Para sintetizar nuevos poliésteres con segmentos alquilo y fluoroalquilo alternados.
Para investigar el comportamiento de auto-segregación y la formación de nanoestructuras en estos polímeros.
Explorar el potencial para la creación de materiales poliméricos nanoestructurados controlados con precisión.

Principales métodos:

Solución de policondensación para sintetizar poliéster a partir de diolos y cloruros diacídicos.
La cicloadición azida-alquina catalizada por el cobre (
Haga clic en hacer clic en hacer clic.
) química para unir cadenas de fluoroalquilo.
Calorimetría de barrido diferencial (DSC), dispersión de rayos X de ángulo pequeño (SAXS), dispersión de rayos X de ángulo ancho (WAXS) y microscopía electrónica de transmisión (TEM) para la caracterización.

Principales resultados:

Ha sintetizado con éxito poliésteres con segmentos periódicos de fluoroalquilo.
Se ha demostrado la auto-segregación de los segmentos inmiscibles de alquilo y fluoroalquilo en estructuras lamelares.
Se observaron dominios cristalinos distintos para los segmentos de alquilo y fluoroalquilo a través de WAXS.
SAXS y TEM confirmaron la morfología lamelar con espaciado de dominio controlado.
Identificó una fase cristalina de líquido esmético entre las transiciones de fusión.

Conclusiones:

Los poliésteres sintetizados exhiben autoensamblaje controlado en morfologías lamelares nanoestructuradas.
La inmiscibilidad de los segmentos impulsa la formación de estructuras ordenadas con tamaños de dominio más pequeños que los copolímeros de bloque tradicionales.
Estos materiales ofrecen una plataforma prometedora para el desarrollo de polímeros nanoestructurados avanzados con propiedades sintonizables.

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