Title: Aldehyde Groups Terminated Bis-Benzoxazine Resins with High Char Yield for Carbon-Carbon Composite Applications

Authors: Hideki Yamamoto, Mari Yoshitake, Atsushi Kumasaki, Ayumi Takaoka

DOI: 10.33599/nasampe/c.24.0285

Abstract: We successfully synthesized novel diamine based bis-benzoxazine (BZ) resins with aldehyde end-terminated groups and characterized their thermal and mechanical properties as matrices for high temperature carbon fiber reinforced plastics (CFRPs). These BZ resins showed excellent melt flowability at lower than 150 oC for converting cured resins with fully cross-linked structures by hot press molding at 220 oC. These cured resins showed a high glass transition temperature of greater than 230 oC and high elongation-at-break (> 4%). Also, the thermal stability of these cured resin was studied using thermogravimetric analysis (TGA) under nitrogen flow, of which the results show a residual weight of around 70 % at 1000°C. Elemental analysis of the film after thermal treatment at 1000 oC was also evaluated. We also successfully fabricated carbon fiber prepregs with these BZ resins. Primitive studies for both processing CFRPs using these BZ resin based prepregs and thermal treatment of the CFRPs to convert carbon-carbon composites will be reported in presentation.

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Conference: CAMX 2024 | San Diego CA

Publication Date: 2024/9/9

SKU: TP24-0000000285

Pages: 10

Price: $20.00