Study of the Compression Behavior of High Performance Fibers.
Abstract
Compression behavior of pitch and PAN based carbon fibers and its dependence on structure and morphology has been studied. Structure development in PAN based fibers with heat treatment temperature has been followed using raman spectroscopy. Compressive strength of glassy resins has been studied. Crosslinking in the free annealed methyl pendant PBZT fibers have been verified using (13)C solid state NMR. Based on the axial compressive strength, torsional modulus, and transverse compressive strength measurements, it is concluded that crosslinking remains a viable approach for improving compressive strength in polymeric fibers. Torsional modulus as a function of temperature has been measured for various high performance fibers. Poly(benzobisthiazole)s containing an ortho-tetra substituted biphenyl moiety were synthesized via the polymerization of 2,5-diamino-1,4- benzenedithiol dihydrochloride with 2,2'-dinitro-6,6'-dimethylbiphenyl-4,4' dicarboxylic acid. PBO and PBZT solubilization mechanism in nitromethane using aluminum chloride has been investigated using solution (27)Al NMR. jg 1
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1996
- Accession Number
- ADA305584
Entities
People
- Malcolm B. Polk
- Satish Kumar
Organizations
- Georgia Tech Research Corporation