Abstract
AbstractTime resolved electrical conductivities of a polycarbonate (PC) composite melt filled with multiwalled carbon nanotubes (MWNTs) were measured in a rheometer equipped with ring electrodes. Strain was applied to the melt in trapezoidal shape, i.e., as a first positive shear pulse, followed by a pause of varying duration, and finally a negative shear pulse was applied. It is well known that applying shear to a conductive melt containing nanotubes causes a conductivity decrease due to the destruction of the nanotube network during shear. This effect should be independent on the direction of shear. However, if there was only a short pause between positive and negative shear pulses, one observes an increase of conductivity during the negative shear pulse. For longer pauses, this effect diminishes, and finally, the expected conductivity decrease can be seen. The effect will be explained by the spatial de‐correlation of the nanotubes related to their agglomeration in the melt during the pause. Normalized conductivity of polycarbonate melt with MWNT during the negative shear pulse for varying duration of the pause between positive and negative shear. magnified image
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.
