Paper number 1344


Chen-Chi M. Ma1, Shang Chin Sung1, Long Y. Chiang2, and Lee Y. Wang2

1Institute of Chemical Engineering
National Tsing Hua University, Hsinchu, Taiwan
2Center for Condensed Matter Sciences
National Taiwan University, Taipei, Taiwan

Summary The linear PU and star C60-PU copolymers were synthesized to modify
novolac phenolic resin. The improvement on the toughness of the cured modified
phenolic resin was investigated. The modified phenolic resins were utilized to prepare carbon/carbon composites. Experimental results confirm the predicted chemical structure of linear PU can be synthesized by reacting the tyramine with PU prepolymer. Furthermore, one isocyanate group of PU prepolymer can react with tyramine, and then the other isocyanate group of PU prepolymer will react with C60(OH)12. Consequently, the star C60-PU can be synthesized. Impact strength of cured resin specimen containing 3phr linear PU is 27 % higher than that of neat phenolic resin which the impact strength of specimen containing 3phr C60-PU is 57 % higher than that of neat phenolic resin. Properties of the C60-PU modified phenolic resin based carbon-carbon composite will be discussed.
Keywords fullerene, polyurethane, phenolic resin, carbon-carbon composite, impact strength.

Theme : Ceramic Matrix and C/C Composites

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