| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
Amorphous Bonding of a Carbon Fiber PEEK Thermoplastic Composite |
| Author(s) |
Libang Wang, Skylar Kindred, Mehran Tehrani, Joseph Kirchhoff |
| On-Site Speaker (Planned) |
Joseph Kirchhoff |
| Abstract Scope |
During rapid processing of thermoplastic composites, such as
welding or automated fiber placement (AFP), crystallization is suspect to limit full interdiffusion, also known as autohesion or self-healing. Repta-tion theory suggests that interdiffusion can persist until temperature falls below the glass transition temperature in amorphous polymers; however, studies indicate that slight crystallization impedes interdiffusion in semi-crystalline polymers. This motivates the incorporation of a thin (5-20 mi-cron) polyetherimide (PEI) layer between low-melting polyaryletherketone (LM-PAEK) interfaces to encourage interdiffusion. This paper reports re-sults of vacuum bag-only (VBO) processing of coupons with varied thermal histories. The discussion focuses on comparing the short beam strength (SBS) of fast-cooled semi-crystalline interfaces with those of amorphous interfaces under diverse processing conditions. Specifically, this work ex-plores the feasibility of processing the amorphous interfaces beneath the melt temperature of the semi-crystalline layer to prevent the melting of crys-tals during the process. In conclusion, this paper sheds light on the intricate interplay between crystallization and interdiffusion in thermoplastic com-posite processing. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |