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Study on the mechanical properties and microstructure of high-performance carbon fiber/epoxy composites |
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| Authors: | Chenyue Zhao Yanan Su Shaoqiu Zheng Hangyu He Xiaoxia Zheng Zhiqiang Li |
| Affiliation: | 1. College of Aeronautics and Astronautics, Taiyuan University of Technology, Jinzhong, China
Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), ?Investigation (equal), Methodology (equal), Writing - original draft (lead);2. College of Aeronautics and Astronautics, Taiyuan University of Technology, Jinzhong, China;3. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, China Contribution: ?Investigation (equal), Methodology (equal);4. College of Aeronautics and Astronautics, Taiyuan University of Technology, Jinzhong, China Contribution: Formal analysis (equal), Funding acquisition (equal) |
| Abstract: | A high-toughness epoxy has been prepared using carboxyl-terminated butadiene acrylonitrile (CTBN) as a toughening agent to modify the AG-80 epoxy resin. High-performance carbon fiber/epoxy (CF/EP) composites are fabricated using the CTBN-toughened epoxy resin as the matrix and two types of CF, namely, T800SC and T800HB, as reinforcement. The mechanical properties of the matrix, surface properties of the CFs, tensile properties, and fracture morphologies of the composites are systematically investigated to elucidate the key factors influencing interfacial bonding in high-performance CF/EP composites. The results reveal that the most significant improvement in toughness is achieved when the CTBN content is 6.90 wt.% in the epoxy resin. Owing to the high content of polar functional groups and excellent surface wettability of T800SC, the T800SC/EP composite exhibits superior mechanical properties compared with the T800HB/EP composite. |
| Keywords: | carbon fiber composites carboxyl-terminated butadiene acrylonitrile tensile properties toughening modification |