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Phenylethynyl-terminated amic acid oligomer prepreg for high temperature composites


Title: Phenylethynyl-terminated amic acid oligomer prepreg for high temperature composites

Authors: Masahiko Miyauchi, Hideki Yamamoto, Atsushi Kumasaki, Tejas Reddy, Masaya Kotaki

DOI: 10.33599/nasampe/c.23.0043

Abstract: Many polyimide based carbon fiber composites have been developed as lightweight materials in place of alloys of aluminum, steel and titanium in aerospace components used for high temperature applications. However, it has been difficult to design the 1st and 2nd ordered chemical structures of imide resins which enable to realize both high processability for molding composites and high thermal stability after curing. We prepared phenylethynyl (PEPA) terminated imide oligomers derived from 1,2,4,5-benzenetetracarboxylic dianhydride and 2-phenyl-(4,4'-diaminodiphenyl ether) with asymmetric and non-planar structure for the polyimide matrix resin of high heat resistant carbon fiber reinforced composites. The imide oligomers showed good minimum melt viscosity at higher than 300 oC for molding the cured resin films with good thermal and mechanical properties. Cured resin film showed a high Tg at 350 oC and Td5s at 550 oC. Surprisingly, the elongation-at-breaks of the cured resins was found to be extremely high (≷ 15 %). Preliminary results for processing of carbon fiber fabric prepregs using corresponding amic acid oligomer (precursor of imide oligomer) solution, thermal behavior of the imide resin in the prepreg before and after curing, and outstanding thermal and mechanical properties of the composites obtained at both room and elevated temperature are reported.

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Conference: CAMX 2023

Publication Date: 2023/10/30

SKU: TP23-0000000043

Pages: 11

Price: $22.00

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