Precursor fiber for carbon fibers, carbon fiber, and method for producing carbon fiber
AssigneeNational Institute of Advanced Industrial Science and Technology
InventorsToshihira Irisawa, Hiroaki Hatori, Yasushi Soneda, Masaya Kodama
Life of this patent
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Abstract
To provide a carbon fiber precursor fiber that can efficiently produce a carbon fiber excellent in mechanical strength without an infusibilization treatment; a carbon fiber; and a method for producing the carbon fiber. The carbon fiber precursor fiber includes a polymer represented by General Formula (1) below: where in the General Formula (1), Ar1 represents an aryl group expressed by any one of Structural Formulas (1) to (5) below, and Ar2 represents an aryl group expressed by Structural Formula (6) or (7) below:
Claims8
A carbon fiber precursor fiber, comprising:
- a polymer represented by General Formula (1) below:
- where in the General Formula (1), Ar1 represents an aryl group expressed by any one of Structural Formulas (2) or (5) below, and Ar2 represents an aryl group expressed by Structural Formula (6) or (7) below:
A carbon fiber obtained by carbonizing a carbon fiber precursor fiber comprising a polymer represented by General Formula (1) below:
- where in the General Formula (1), Arl represents an aryl group expressed by any one of Structural Formulas (1) to (3) or (5) below, and Ar2 represents an aryl group expressed by Structural Formula (6) or (7) below, except for a combination in which Ar1is the aryl group expressed by Structural Formula (1) or Structural Formula (3) and Ar2 is the aryl group expressed by Structural Formula (6) or a combination in which Ar1 is the aryl group expressed by Structural Formula (3) and Ar2 is the aryl group expressed by Structural Formula (7):
A method for producing a carbon fiber, the method comprising:
- spinning a compound to be spun containing a polymer represented by General Formula (1) below to obtain a carbon fiber precursor fiber;
- and
- heating the carbon fiber precursor fiber under inert gas to carbonize the carbon fiber precursor fiber:
- where in the General Formula (1), Ar1 represents an aryl group expressed by any one of Structural Formulas (1) to (3) or (5) below, and Ar2 represents an aryl group expressed by Structural Formula (6) or (7) below, except for a combination in which Ar1 is the aryl group expressed by Structural Formula (1) or Structural Formula (3) and Ar2 is the aryl group expressed by Structural Formula (6) or a combination in which Ar1 is the aryl group expressed by Structural Formula (3) and Ar2 is the aryl group expressed by Structural Formula (7):
Dependencies are inferred from the claim text.