Resumen
Se estudió el efecto de un mezclador estático ultrasónico de frecuencia fija de 20kHz en la obtención de compuestos de polipropileno y nanotubos de carbono de pared múltiple (MWCNT). El ultrasonido fue aplicado en estado fundido del compuesto mediante un mezclador estático ultrasónico, colocado a la salida de un extrusor monotornillo. Los compuestos de PP/MWCNTs obtenidos se caracterizaron por DSC, TGA, SEM, RAMAN y se determinaron sus propiedades de conductividad térmica y eléctrica, así como sus propiedades de tensión. Se observó un aumento en la cristalinidad del PP en los compuestos producto del efecto nucleante de los nanotubos de carbono. Los compuestos de PP/MWCNTs con tratamiento ultrasónico presentaron una mejor dispersión de los MWCNTs, lo cual contribuyo al incremento del módulo de elasticidad, una mejor estabilidad térmica y a un incrementó en la conductividad térmica y un aumento significativo en la conductividad eléctrica.
Citas
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