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Process–structure–property relationships of thermoformed woven carbon‐fiber‐reinforced polyether‐ether‐ketone composites
Author(s) -
Zheng Bing,
Li Maoyuan,
Deng Tianzhengxiong,
Zhou Helezi,
Huang Zhigao,
Zhou Huamin,
Li Dequn
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.25241
Subject(s) - peek , materials science , composite material , composite number , void (composites) , thermoforming , polyether ether ketone , flexural strength , fiber , polymer
In this study, the process–structure–property relationships of thermoformed, woven, carbon fiber (CF)‐reinforced polyether‐ether‐ketone (PEEK) composites were investigated, and the associated mechanisms were systematically discussed. Woven CF/PEEK prepregs were prepared using an electrostatic powder coating technique, and composite laminates were fabricated via thermoforming, using four processing temperatures (360, 380, 400, and 420°C) and five holding pressures (1, 3, 5, 7, and 9 MPa), respectively. The macroscopic properties and microstructures of the composite laminates were analyzed using mechanical characterization, thermal characterization, and microscopic observations. The results show that the flexural properties of the woven CF/PEEK composite tended to initially improve and subsequently decline as the processing temperature and holding pressure were increased. They are primarily determined by several complex mechanisms, such as the matrix properties, void defects, and fiber/resin interaction. The interlaminar shear properties of the woven CF/PEEK maintain a similar trend as the temperatures increases from 360°C to 420°C, while it is substantially unchanged as the holding pressure increases from 1 to 9 MPa. They are primarily determined by the mechanisms, such as matrix properties, void defects, and interlayer adhesion. Finally, these mechanisms were systematically discussed. POLYM. COMPOS., 40:3823–3834, 2019. © 2019 Society of Plastics Engineers