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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Batista, Natassia L. [1, 2] ; Rezende, Mirabel C. [3] ; C.Botelho, Edson [2]
Total Authors: 3
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: APPLIED COMPOSITE MATERIALS; v. 28, n. 1, p. 235-246, FEB 2021.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 17/16970-0 - Obtaining and Characterization of Nanostructured Thermoplastic Composites for Aeronautical Application
Grantee:Edson Cocchieri Botelho
Support Opportunities: Regular Research Grants
FAPESP's process: 12/12207-6 - Study of the crystallinity effect of mechanical properties of thermoplastic composites with aeronautical application
Grantee:Natassia Lona Batista
Support Opportunities: Scholarships in Brazil - Doctorate