Study of the compression behavior of high performance fibers. Final report, 1 April 1991-30 November 1995

Kumar, S; Polk, M B

Title: Study of the compression behavior of high performance fibers. Final report, 1 April 1991-30 November 1995

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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.

Authors:: Kumar, S; Polk, M B

Publication Date:: Wed Jan 31 00:00:00 EST 1996

Research Org.:: Georgia Institute of Technology, Atlanta, GA (United States)

OSTI Identifier:: 270138

Report Number(s):: AD-A-305584/5/XAB
CNN: Contract AFOSR-91-0194; TRN: 61980356

Resource Type:: Technical Report

Resource Relation:: Other Information: PBD: 31 Jan 1996

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; CARBON FIBERS; COMPRESSIBILITY; MECHANICAL PROPERTIES; MATERIALS WORKING; ANNEALING; ZIRCONIUM COMPOUNDS; METHYL RADICALS; POLYMERS; ALUMINIUM CHLORIDES; PROGRESS REPORT

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                    Kumar, S, and Polk, M B. Study of the compression behavior of high performance fibers. Final report, 1 April 1991-30 November 1995.  United States: N. p., 1996. 
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                    Kumar, S, & Polk, M B. Study of the compression behavior of high performance fibers. Final report, 1 April 1991-30 November 1995.  United States.

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                    Kumar, S, and Polk, M B. 1996.  
        "Study of the compression behavior of high performance fibers. Final report, 1 April 1991-30 November 1995".  United States.

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@article{osti_270138,

  title        = {Study of the compression behavior of high performance fibers. Final report, 1 April 1991-30 November 1995},

  author       = {Kumar, S and Polk, M B},

  abstractNote = {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.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/270138},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Jan 31 00:00:00 EST 1996},

  month        = {Wed Jan 31 00:00:00 EST 1996}

}

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