Compression Behavior of High Performance Polymeric Fibers

摘要

Hydrogen bonding has proven to be effective in improving the compressive strength of rigid-rod polymeric fibers without resulting in a decrease in tensile strength while covalent crosslinking results in brittle fibers. Tensile strength of the PBO/SWNT fiber containing 10 wt% SWNT is over 50% higher than that of the control PBO fibers containing no SWNT. An optically homogeneous solution/dispersion of single wall carbon nanotubes (SWNTs) in oleum has been used to form isotropic films as well as SWNT coatings on polymers. Addition of SWNT increases the crystallization rate of polypropylene by as much as an order of magnitude or higher. SWNT orientation and exfoliation are important in achieving high modulus SWNT/polymer composite fibers. The specific capacitance of the SWNT/activated carbon film is significantly higher than that of the bucky paper.