Study on Rheological Behavious of Carbon Based Thermoplastic Polyurethane Nanocomposite

In the present study, nanocomposites of thermoplastic polyurethane (TPU) and multi-walled carbon nanotubes (MWCNTs) with varying nano content (ranging from 0 wt% to 1 wt%) were prepared via melt compounding method and the effect of the MWCNTs content on rheological properties was studied using a rheometrics mechanical spectrometer (RMS). The frequency sweep analysis confirmed that with the presence of 0.4% MWCNTs, a second crossover appeared which shifted to higher frequencies with further increase of nano content. storage modulus variations versus nanoparticle content corroborated that in a nano content of 0.4%, a sharp increase in storage modulus occurred and this nano content was considered as a percolation threshold. Avrami equation based on the time sweep analysis corroborated that increase in nano content substantially promoted the phase separation kinetics.

Study on Rheological Behavious of Carbon Based Thermoplastic Polyurethane Nanocomposite Keywords:

thermoplastic polyurethane , multi-walled carbon nanotubes , rheological properties , rheometrics mechanical spectrometer