Thermal Expansion Coefficients of Unidirectional Carbon Fiber/PEEK Composite Made of Commingled Yarns
Ho-Gyu Yoon, Kiyohisa Takahashi, Kazuhisa Harakawa
Abstract
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Ho-Gyu Yoon, Kiyohisa Takahashi, Kazuhisa Harakawa
Abstract
Open-access reader
Unidirectional carbon fiber (CF)/poly(ether-ether-ketone) (PEEK) composite was manufactured from the commingled yarns composed of CF and PEEK filaments (this composite is named 'commingled composite').The thermal expansion coefficient (TEC) of the commingled composite was measured and compared with that of CF/PEEK unidirectional composite made of prepreg sheets (this composite is named 'prepreg composite').The minimum value of TEC's parallel to the fiber direction was observed at around 150℃ for both specimens which were not thermally treated.This minimum disappeared after the thermal treatment at 230℃ for 30 minutes or the repeating measurements (0℃ →230℃,0℃ →230℃,……).
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Unidirectional carbon fiber (CF)/poly(ether-ether-ketone) (PEEK) composite was manufactured from the commingled yarns composed of CF and PEEK filaments (this composite is named 'commingled composite').The thermal expansion coefficient (TEC) of the commingled composite was measured and compared with that of CF/PEEK unidirectional composite made of prepreg sheets (this composite is named 'prepreg composite').The minimum value of TEC's parallel to the fiber direction was observed at around 150℃ for both specimens which were not thermally treated.This minimum disappeared after the thermal treatment at 230℃ for 30 minutes or the repeating measurements (0℃ →230℃,0℃ →230℃,……).
Key concepts: Peek, Materials science, Composite number, Composite material, TEC, Thermal expansion, Fiber, Glass transition