| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite fiber composed of a wholly aromatic polyamide and a high-purity multilayer carbon nanotube and having excellent mechanical properties. SOLUTION: The composite fiber is composed of 100 pts.wt. of a wholly aromatic polyamide composed mainly of constituent units of formula (A): -NH-Ar<SP>1</SP>-NH- and formula (B): -OC-Ar<SP>2</SP>-CO-, and 0.01-20 pts.wt. of multilayer carbon nanotubes prepared by an arc discharge method and having an average tube diameter of 3-30 nm, an average number of layers of 2-10, an average tube length of 200 nm to 10μm, and total content of amorphous carbon and metal of≤1 wt.%, wherein the multilayer carbon nanotubes are dispersed in the wholly aromatic polyamide and has an aggregation diameter of≤100 nm. In the general formulas (A) and (B), Ar<SP>1</SP>and Ar<SP>2</SP>are each independently a 6-20C bivalent aromatic group. COPYRIGHT: (C)2009,JPO&INPIT
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