Pitch-based short carbon fiber. Final report
Short carbon fiber manufactured from coal tar pitch by Osaka Gas Co. is examined by chemical composition analysis, X-ray powder diffraction, optical microscope, and electron spectroscopic techniques. The present analytical results are compared with the data obtainable from other sources. Owing to the low cost of the short fiber, it is recommended that the fiber could be used for a wide variety of reinforcement applications such as, cement/concrete mixtures, polymer composites, and high temperature materials. Processing includes the mechanical separation of mesophase microbeads of three to 30 micron diameters from crude coal tar during three heat treatment stages. The mesophases obtained are then subjected to solvent extraction, hydrogenation, and polymerization to yield isotropic and anisotropic pitches suitable for melt spinning. The short fiber is fabricated from isotropic pitch by the rotary gas jet method, and the process yields a higher quality fiber as compared to other melt spinning methods. The most important feature is that this process is highly cost effective.
- Research Organization:
- Army Materials Research Agency, Watertown, MA (United States). Materials Technology Lab.
- OSTI ID:
- 5639397
- Report Number(s):
- AD-A-244780/3/XAB; MTL-TR-91-51
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
CARBON FIBERS
FABRICATION
CEMENTS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
COAL TAR
COMPOSITE MATERIALS
CONCRETES
ELECTRON SPECTROSCOPY
ELECTRONS
FIBERS
GASES
HYDROGENATION
LENGTH
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPES
MIXTURES
OPTICAL EQUIPMENT
POLYMERIZATION
POLYMERS
POWDERS
PROCESSING
ROTATION
SCANNING ELECTRON MICROSCOPY
SOLVENT EXTRACTION
SPECTROSCOPY
USES
BUILDING MATERIALS
CHEMICAL REACTIONS
DIMENSIONS
DISPERSIONS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
EQUIPMENT
EXTRACTION
FERMIONS
FLUIDS
LEPTONS
MICROSCOPY
MOTION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
SEPARATION PROCESSES
TAR
360601* - Other Materials- Preparation & Manufacture
010500 - Coal
Lignite
& Peat- Products & By-Products