Thermoplastic polyurethane (TPU) nanocomposites exhibit a multi-scale phase separation morphology.
Carbon nanotubes (CNTs) effectively influence the TPU morphology at different scales.
CNTs preferentially aggregate in the TPU hard domain (HD) regions.
CNTs favor nucleation and growth of smaller and more distributed HD spherulites.
Cellulose nanocrystals (CNCs) have a positive effect on CNT dispersion and distribution.