Banca de DEFESA: CAIO MIGUEL MARANHÃO SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE: CAIO MIGUEL MARANHÃO SILVA
DATA: 09/04/2026
HORA: 14:30
LOCAL: Remoto
TÍTULO: Impacto do Reprocessamento por Extrusão nas Características Químicas e Morfológicas de Filamentos de Polipropileno Reforçado com Grafite
PALAVRAS-CHAVES: Polypropylene; graphite powder; 3D printing; reprocessing; additive manufacturing.
PÁGINAS: 75
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Polímeros, Aplicações
RESUMO:

Additive manufacturing, especially through fused deposition modeling (FDM), has become prominent in the production of polymeric parts with complex geometries. In this context, polypropylene (PP) shows potential for application in 3D printing due to its properties and low cost, although it still presents processing limitations. As an alternative to modify its performance, the addition of graphite powder can contribute to improving the material's properties. Furthermore, reprocessing by extrusion allows simulating recycling cycles and evaluating the composite's stability after successive processing. Thus, this work aimed to develop and characterize PP composites with graphite powder for the production of 3D printing filaments, evaluating the influence of different reprocessing cycles by extrusion (1x, 5x, and 10x). Optical microscopy (OM) analyses indicated that increasing the number of reprocessing cycles favored the dispersion of the filler in the polymeric matrix, although samples with higher graphite content showed a greater tendency to form agglomerates. Fourier Transform Infrared Spectroscopy (FTIR) showed that the incorporation of graphite and reprocessing cycles did not promote significant chemical changes in the polypropylene structure. Dynamic Mechanical Analysis (DMA) results showed an increase in the stiffness of the composites with the addition of graphite. Overall, the results indicate that the developed composites maintain potential for application in the production of filaments for 3D printing, even after successive reprocessing cycles, demonstrating the viability of reusing the material in additive manufacturing processes.

MEMBROS DA BANCA:
Presidente - 1331130 - TATIANNY SOARES ALVES
Interno - 1720808 - RENATA BARBOSA
Externo à Instituição - 804.***.***-91 - CLARISSA COUSSIRAT ANGRIZANI - UNIPAMPA