Claims
- 1. A high strength, high modulus, binderless, single phase bulk carbon article having fibrillar microstructure and a Young's modulus of at least 2.5.times.10.sup.7 psi (172 GPa) consisting essentially of a heat distortion flowed, unimpregnated, concomitant, self-bonded pyrolysis product of a plurality of substantially unidirectionally oriented polymer fibers.
- 2. The article of claim 1 wherein the polymer is an acrylic copolymer.
- 3. The article of claim 2 wherein the acrylic copolymer comprises approximately 90% acrylonitrile.
- 4. The article of claim 1 wherein the polymer is polybenzimidazole.
- 5. The article of claim 1 wherein the polymer is selected from the group consisting of homopolymers, copolymers, terpolymers, and graft copolymers of acrylonitrile, containing at least 50% acrylonitrile.
- 6. The article of claim 1 wherein the polymer is selected from the group consisting of aromatic polycyclic polymers, polyvinyl alcohol, polyvinyl chloride, polymethyl vinylketone, coal tar, and pitch.
- 7. The article of claim 1 having a modulus of rupture of 45,000 psi.
- 8. The article of claim 1 having a modulus of rupture of 70,000 psi and a Young's modulus of 25,000,000 psi.
- 9. The article of claim 1 having a modulus of rupture of 83,000 psi and a Young's modulus of 33,000,000 psi.
- 10. The article of claim 1 having a modulus of rupture of 83,000 psi and a Young's modulus of 50,000,000 psi.
- 11. A high strength, high modulus, binderless, single phase bulk carbon article having fibrillar microstructure and a modulus of rupture of at least 7000 psi (48.2 MPa) consisting essentially of a heat distortion flowed, unimpregnated, concomitant, self-bonded pyrolysis product of a plurality of two or three dimensionally oriented short-length polymer fibers.
- 12. The article of claim 11 wherein the polymer is an acrylic copolymer.
- 13. The article of claim 12 wherein the acrylic copolymer comprises approximately 90% acrylonitrile.
- 14. The article of claim 11 wherein the polymer is polybenzimidazole.
- 15. The article of claim 11 wherein the polymer is selected from the group consisting of homopolymers, copolymers, terpolymers, and graft copolymers of acrylonitrile, containing at least 50% acrylonitrile.
- 16. The article of claim 11 wherein the polymer is selected from the group consisting of aromatic polycyclic polymers, polyvinyl alcohol, polyvinyl chloride, polymethyl vinylketone, coal tar, and pitch.
- 17. The article of claim 11 having a modulus of rupture of 20,000 psi (138 MPa).
- 18. The article of claim 11 having a modulus of rupture of 10,500 psi (72 MPa).
Parent Case Info
This is a division of application Ser. No. 661,211, filed Feb. 25, 1976, which is a continuation of application Ser. No. 481,438, filed June 20, 1974, now abandoned.
US Referenced Citations (10)
Non-Patent Literature Citations (1)
Entry |
Bourdeau et al., "Development of High Modulus Carbon Fiber, Tape, and Composites", AMMRC CTR 73-20, May 1973, 30 pages, 16 figures. |
Divisions (1)
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Number |
Date |
Country |
Parent |
661211 |
Feb 1976 |
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Continuations (1)
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Number |
Date |
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481438 |
Jun 1974 |
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