Addition of poly (ethylene-co-methacrylic acid) (EMAA) as self-healing agent to carbon-epoxy composites

• Autor(a) principal: Nascimento, Allana Azevedo do
• Data de Publicação: 2020
• Outros Autores: Fernandez, Fernando, Silva, Fábio S. da, Ferreira, Evans Paiva da Costa, Melo, José Daniel Diniz, Barbosa, Ana Paula Cysne
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/31946
• topic: Self-healing; Polymer-matrix composites (PMCs); Smart materials; Delamination

Among several self-healing approaches to improve the durability of polymer-based materials during service, the addition of thermoplastics to a thermoset matrix has emerged as a promising self-healing alternative. In this study, poly (ethylene-co-methacrylic acid) (EMAA) was added to the mid-plane of carbon fiber-epoxy composite laminates to produce a self-healing system. Composite plates were manufactured with the addition of 5 wt%, 10 wt% and 15 wt% of EMAA as related to the matrix weight in the prepreg laminate. Interlaminar shear strength (ILSS) tests, dynamic mechanical analysis (DMA), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and field-emission gun scanning electron microscopy (FEG-SEM) were employed to evaluate the self-healing effect and composite properties before and after a healing cycle. Storage modulus was found to decrease with increasing content of EMAA in the laminate. Samples with EMAA showed complete recovery of interlaminar shear strength after healing