| 摘要 |
To provide: PBI carbon fiber that can be efficiently produced without infusibilization treatment and is excellent in elastic modulus and strength; and method for producing the PBI carbon fiber. The PBI fiber includes structure obtained by turning precursor fiber including PBI into carbon fiber under heating, the PBI including structure represented by General Formula (1) or (2) as structural unit, the PBI carbon fiber having elastic modulus in tension of 100GPa or more and tensile strength of 0.8GPa or more:
where R 1 and R 3 represent trivalent or tetravalent group of one selected from the group consisting of aryl groups and unsaturated heterocyclic groups expressed by the following (1) to (10), and R 2 represents bivalent group of one selected from the group consisting of aryl groups and unsaturated heterocyclic groups expressed by the following (1) to (10), C 2 -C 4 alkenylene groups, oxygen atom, sulfur atom, and sulphonyl group: |
