Pitch-based short carbon fiber. Final report

Technical Report · Sun Dec 01 04:00:00 EST 1991

OSTI ID:5639397

Lin, S S

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

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500 -- Coal
Lignite
& Peat-- Products & By-Products
36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
BUILDING MATERIALS
CARBON FIBERS
CEMENTS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL TAR
COMPOSITE MATERIALS
CONCRETES
DIMENSIONS
DISPERSIONS
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELECTRONS
ELEMENTARY PARTICLES
EQUIPMENT
EXTRACTION
FABRICATION
FERMIONS
FIBERS
FLUIDS
GASES
HYDROGENATION
LENGTH
LEPTONS
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPES
MICROSCOPY
MIXTURES
MOTION
OPTICAL EQUIPMENT
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
POLYMERIZATION
POLYMERS
POWDERS
PROCESSING
ROTATION
SCANNING ELECTRON MICROSCOPY
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
TAR
USES