Abstract
The transfer mechanism of applied stress in single-wall carbon nanotube (SWCNT)/poly(methylmethacrylate) (PMMA) nanocomposites was investigated using in situ Ramanspectroscopy on composite fibers. These SWCNT/PMMA nanocomposite fibers have nospecific SWCNT–polymer interactions and the high degree of nanotube alignmentminimizes the contributions from nanotube–nanotube interactions. Althoughtensile testing found significantly improved overall mechanical properties of thefibers, effective stress transfer to SWCNTs is limited to a small strain regime (ε<0.2%). At higher strains, the stress on the SWCNTs decreases due to the slippage at thenanotube–polymer interface. Slippage was also evident in scanning electron micrographsof fracture surfaces produced by tensile testing of the composite fibers. Aboveε = 0.2%, the strain-induced slippage was accompanied by irreversible responses in stress andRaman peak shifts. This paper shows that efficient stress transfer to nanotubes asmonitored by Raman spectroscopy is crucial to improving the mechanical properties ofpolymer nanocomposites and to detecting internal damage in nanocomposites.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
