Opportunities in Protection Materials Science and Technology for Future Army Applications (2011) / Chapter Skim
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Appendix F: High-Performance Fibers
Appendix F: High-Performance Fibers
Pages 136-138
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From page 136... ...
Surprisingly, there is a decrease in molecular weights of 50,000 to 200,000 g/mole, are common viscosity with increased polymer concentration due to local examples of such polyethylene products. But if PE molecules alignment of polymer molecules in the solution to form a could be extended into straight chains, the carbon-carbon nematic phase.
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From page 137... ...
-- there is no solvent to be removed in in rigid-rod polymers with the intent of increasing the fi the processing of thermotropic liquid crystalline polymers. ber compressive strength and torsional modulus, the Akzo Compared to polyethylene, however, the molecular weights Nobel firm in the Netherlands synthesized and processed (and hence the chain length)
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From page 138... ...
Fibers with the highest tensile strength are typically ALUMINA, BORON, SILICON CARBIDE, GLASS, AND obtained at about 1300°C to 1500°C. ALUMINA BOROSILICATE CERAMIC FIBERS Boron fiber is processed using chemical vapor deposiCARBON NANOTUBE FIBERS tion on substrates such as tungsten or carbon, whereas silicon Carbon nanotube (CNT)
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