Effect of crystallinity on the mechanical behavior of carbon fiber reinforced polyethylene-terephthalate (CF/PET) composites considering temperature conditions
- Authors
- Um, Hui-Jin; Hwang, Yeon-Taek; Choi, Kyung-Hee; Kim, Hak-Sung
- Issue Date
- May-2021
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Carbon fibres; Polymer-matrix composites (PMCs); High-temperature properties
- Citation
- COMPOSITES SCIENCE AND TECHNOLOGY, v.207, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMPOSITES SCIENCE AND TECHNOLOGY
- Volume
- 207
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1214
- DOI
- 10.1016/j.compscitech.2021.108745
- ISSN
- 0266-3538
- Abstract
- Thermoplastic differs in crystallinity depending on the manufacturing conditions such as temperature and cooling rate, which affect the mechanical properties of the thermoplastic-based composites. In this work, the crystallinity of polyethylene terephthalate (PET) was varied according to the cooling rate to investigate the mechanical properties of PET matrix-based carbon fiber (CF)/PET composites. The thermal characteristics and crystallinity were analyzed through the differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analysis. The mechanical behavior of CF/PET composites with different degrees of crystallinity was studied with varied temperature conditions. The failure modes of the fractured CF/PET composites were observed by using a digital microscope and scanning electron microscope (SEM). As a result, the crystallized CF/PET composites were improved 11.6 times higher in in-plane shear (±45° laminated) strength and 3.78 times higher in shear modulus than that of amorphous CF/PET composites at high temperature.
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