- Author
-
Gaulin, C. A.
|
McDonald, W. R.
- Title
- Polyacrylonitrile Precursor Fibers for Conversion to High Modulus, High Strength Fibers. Volume 1. Thermal Analysis.
- Coporate
- Aerospace Corp., El Segundo, CA
- Sponsor
- Space and Missile Systems Organization, Los Angeles, CA
- Report
-
TR-0059(6250-40)-5; SAMSO-TR-71-61
February 12, 1971
27 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
fibers
|
irradiation
|
oxidation
|
polyacrylonitrile
|
thermal analysis
- Identifiers
- carburization; graphite fiber; high modulus - high strength fibers
- Abstract
- The chemistry of polyacrylonitrile (PAN) polymers is of particular interest because of the use of these materials as precursors in the formation of high modulus carbon and graphite reinforcement filaments for organic materials in high strength, high stiffness composites. A study has been initiated into the mechanism of thermal degradation of the PAN polymers and has included commercially available yarn prepared from a copolymer of unknown history, and experimental fibers produced from both copolymers and homopolymers. Thermal methods primarily differential thermal analysis (DTA) and thermogravimetric analysis (TGA); have been used to characterize the changes in decomposition mechanisms of the PAN fibers resulting from oxidative radiation stabilization.