Accession Number : ADD014228

Title :   Method for Stabilization of Pan-Based Carbon Fibers.

Descriptive Note : Patent Application, Filed 30 Jun 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Peebles, Leighton H

Report Date : 30 Jun 1989

Pagination or Media Count : 11

Abstract : This invention relates to carbon fibers, and more particularly, to an improved process for stabilizing polyacrylonitrile (PAN) based fibers prior to carbonization and high-temperature heat treatment. There has been an increasing demand for construction materials of high strength-to-weight ratio and high Young's modulus for use in civilian and military applications, particularly for materials that have good thermal stability. Accordingly, there has been a demand for improved reinforcing fibers to be embodied in structural composites which are exposed to conditions of high temperature and high mechanical stress. Carbon fibers are produced in five manufacturing steps: polymerization of monomers, such as acrylonitrile; orientation of the linear polymer molecules by spinning them into fibers; stabilization by heating the fibers to 150-350 C. Patent applications. (JES)

Descriptors :   *CARBON FIBERS, ACRYLONITRILE POLYMERS, CARBON, COMPOSITE STRUCTURES, CONSTRUCTION MATERIALS, CONVERSION, FIBERS, HEAT TREATMENT, HEATING, HIGH TEMPERATURE, LINEAR SYSTEMS, MECHANICAL PROPERTIES, MILITARY APPLICATIONS, MOLECULES, MONOMERS, NITRILES, POLYACRYLATES, POLYMERIZATION, POLYMERS, REINFORCING MATERIALS, SPINNING(MOTION), STABILIZATION, STRENGTH WEIGHT RATIO, STRESSES, THERMAL STABILITY

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE