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Permitir la activación mecanocrómica a temperatura ambiente en un polímero vítreo: síntesis y caracterización del
Yuval Vidavsky, Steven J Yang, Brooks A Abel
1Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Haifa 3200003 , Israel.
Journal of the American Chemical Society
|June 28, 2019
Resumen
Este estudio demuestra la activación mecanocrómica a temperatura ambiente en plásticos de policarbonato de alto rendimiento. Este avance permite la detección temprana de daños en los materiales estructurales, mejorando la seguridad y la durabilidad.
Área de la Ciencia:
- Ciencias de los materiales
- Química de los polímeros
- Materiales inteligentes
Sus antecedentes:
- Los polímeros mecanocrómicos ofrecen potencial para la detección de daños a través de moléculas sensibles a la fuerza (mecanoforos).
- Las aplicaciones anteriores en plásticos estructurales fueron limitadas debido a la falla de fragilidad anterior al cambio de color.
Objetivo del estudio:
- Para lograr la activación mecanocrómica a temperatura ambiente en una alta temperatura de transición de vidrio (Tg) el policarbonato de bisfenol A.
- Desarrollar métodos eficientes para incorporar la funcionalidad mecanocrómica en los plásticos estructurales.
Principales métodos:
- Funcionalidad mecanocrómica incorporada mediante la polimerización del dihidroxispiropirano como comonomero en policarbonato.
- Investigación de la respuesta mecanocrómica al estrés, la deformación y el tiempo.
- Demostró un nuevo enfoque laminado para incorporar la funcionalidad mecanocrómica sin dispersión a granel.
Principales resultados:
- Se ha conseguido la activación mecanocrómica a temperatura ambiente en policarbonato conservando sus propiedades termomecánicas.
- Obtuvo información sobre cómo el historial de carga influye en la acumulación de tensiones en las cadenas de polímeros.
- Se ha demostrado con éxito un método laminado para la integración eficiente de materiales mecanocrómicos.
Conclusiones:
- La activación mecanocrómica a temperatura ambiente es factible en polímeros estructurales como el policarbonato.
- Los nuevos métodos de preparación y procesamiento hacen avanzar la aplicación de materiales inteligentes mecanocrómicos.
- Este trabajo allana el camino para sistemas prácticos de advertencia de daños en plásticos de ingeniería.
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