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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

The Influence of Crystallinity on the Weather Resistance of CF/PEEK Composites

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Autor(es):
Batista, Natassia L. [1, 2] ; Rezende, Mirabel C. [3] ; C.Botelho, Edson [2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] McGill Univ, Dept Mech Engn, 817 Sherbrook St West, Montreal, PQ H3A 0C3 - Canada
[2] Univ Estadual Paulista, UNESP, Dept Mat & Technol, Av Ariberto Pereira da Cunha, SP 333, Guaratingueta - Brazil
[3] Univ Fed Sao Paulo UNIFESP, Inst Sci & Technol, Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: APPLIED COMPOSITE MATERIALS; v. 28, n. 1, p. 235-246, FEB 2021.
Citações Web of Science: 1
Resumo

The purpose of this work is to investigate how the crystallinity degree of carbon fiber / poly(ether-ether-ketone (CF/PEEK) composites affects their performance when exposed to ultraviolet radiation, hygrothermal, and salt fog conditionings. Thermal characterization was performed by differential scanning calorimetry (DSC) and dynamical mechanical analyses (DMA), whereas interlaminar shear strength (ILSS), impulse excitation technique and compression tests were employed for mechanical characterization. According to the results obtained in this work, the CF/PEEK laminates with higher crystalline contents presented significantly lower water absorption. An increase in the crystallinity degree throughout the conditionings was observed for the CF/PEEK samples with lower crystalline contents, as a result of chemi-crystallization, or high temperatures, and/or water uptake. Moreover, the crystalline content also showed to affect the severity of the degradation for the UV/condensation conditioning, with the samples with lower degree of crystallinity being the most resistant. No significant changes have been observed for the mechanical properties evaluated. (AU)

Processo FAPESP: 17/16970-0 - Obtenção e caracterização de compósitos termoplásticos nanoestruturados para aplicação aeronáutica
Beneficiário:Edson Cocchieri Botelho
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 12/12207-6 - Estudo do efeito da cristalinidade nas propriedades mecânicas de compósitos termoplásticos com aplicações aeronáuticas
Beneficiário:Natassia Lona Batista
Linha de fomento: Bolsas no Brasil - Doutorado