Banca de QUALIFICAÇÃO: LILIAN MAIARA MORAIS E SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : LILIAN MAIARA MORAIS E SILVA
DATA : 21/05/2018
HORA: 10:00
LOCAL: Sala de aulas do PPGCEM
TÍTULO:

Study of the addition of the thermoplastic poly(ethylene-co-methyl acrylate-co-glycidil methacrylate) (E-MA-GMA) as healing agent in glass fiber – epoxy composites

PALAVRAS-CHAVES:

fiberglass-epoxy, self-healing, E-MA-GMA, prepreg.

PÁGINAS: 60
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Materiais Conjugados Não-Metálicos
RESUMO:

A critical problem of polymers and polymer composites is their susceptibility to nucleate microcracks during service, which can cause catastrophic failure or shortening the service lifetime of the components. An alternative to this is the use of self-healing materials, where the formed microcracks are repaired, preventing catastrophic failure propagation and reducing maintenance costs. One of the mechanisms suggested in the literature for self-healing of microcracks is the application of thermoplastic particles. The aim of this work is to analyze the effect of the addition of poly (E-MA-GMA) thermoplastic as a healing agent in a fiberglass-epoxy composite. The materials studied were characterized by interlaminar shear strength (ILSS), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and dynamic mechanical analysis (DMA). The addition of thermoplastic did not cause significant reduction in the Tg of the composite. However, it showed a reduction of the stiffness of the system. Results of ILSS after repair showed that the samples had reduced stiffness and strength when compared to the state before repair. MEV images showed that E-MA-GMA functioned as an adhesive agent, preventing delamination in the mid-plane of the laminate.

MEMBROS DA BANCA:
Presidente - 2042234 - ANA PAULA CYSNE BARBOSA
Externo ao Programa - 1064594 - EVANS PAIVA DA COSTA FERREIRA
Interno - 1202134 - JOSE DANIEL DINIZ MELO