ESTUDO COMPARATIVO DAS PROPRIEDADES TÉRMICAS, MORFOLÓGICAS E MECÂNICAS DE PA E PLA NA IMPRESSÃO 3D

Abstract

This study conducted a comprehensive characterization of the thermal, morphological, and mechanical properties of poly(lactic acid) (PLA) and polyamide (PA) filaments used in 3D printing, including their carbon fiber (CF) and glass fiber (GF) reinforced variants, as well as specialized versions for high-strength (PRO) and high-temperature (PAHT) applications. Using Differential Scanning Calorimetry (DSC), tensile tests, and Scanning Electron Microscopy (SEM), the thermal behavior, mechanical strength, and internal morphology of the filaments were investigated. The results indicate that PAHT CF15, reinforced with 15% carbon fiber, exhibits the best thermal and mechanical resistance, making it suitable for high-temperature applications. PA6 GF30, with 30% glass fiber, offers a good balance between stiffness and strength. In contrast, PLA White and PLA Pro materials are more suited for moderate- temperature applications. The analysis of different infill patterns (40% and 100%) reveals that the choice of configuration depends on cost-effectiveness, considering the specific application and desired strength. The study suggests that improvements in matrix-fiber adhesion could optimize the performance of the composites, particularly for PAHT CF15.