In this work, the thermomechanical properties of an isotactic polypropylene (iPP)/quill composite were evaluated. This reinforcement was added at 0.5, 1.0 and 5.0 wt% in the iPP matrix. The reinforcement was previously subjected to alkaline treatment with NaOH (QT) and chemical functionalization with pimelic acid (PA) to produce an effective β-crystal nucleating agent. This functionalization was characterized by Fourier transform infrared spectroscopy (FTIR), showing the presence of a new band at 1571 cm À1 associated with the carboxylate group of pimelic acid, indicating a bond between PA and the quill surface. The internal geometry of the specimens obtained by 3D printing were studied by scanning electron spectroscopy (SEM). The effectiveness of the modified reinforcement as a promoter of the β-crystalline phase was evaluated by differential scanning calorimetry (DSC) and wide angle X-ray scattering (WAXD) under non-isothermal crystallization conditions due to the 3D printing process. The composite that showed a higher K β index was 1.0% with a value of 64% by DSC and 65% by WAXD. Furthermore, the thermomechanical properties were characterized by dynamic mechanical analysis (DMA) where, for the 0.5% and 1.0% composites, the storage modulus (E'

En este trabajo se evaluó el rendimiento de refuerzo de nanotubos de Titania en una matriz de polipropileno isotáctico (iPP). Este refuerzo se añadió al 1,0 y 1,5% en peso en la matriz de polipropileno. Para verificar la formación de la estructura tubular, se realizó un análisis FT-IR, mostrando la presencia de las bandas 912 y 647 cm−1 que corresponden a la región de frecuencia del esqueleto del nanotubo de Titania. Se fabricó un filamento de los nanocompositos para la impresión de probetas mediante FDM con ayuda de una impresora Ender 3 Pro. Las propiedades termo-mecánicas se caracterizaron mediante análisis mecánico dinámico (DMA) donde, para los compositos 1,0 y 1,5% en peso. El módulo de almacenamiento (E') fue superior en comparación con el iPP puro, mostrando una mejoría del (40% y 60%) respectivamente.

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