This small amount of stretch is much lower than the total draw hot-draw
ratio of 21.6 X in the solid state.
At a relatively low hot-draw
ratio of 30, the fibers prepared by mechanical solvent removal become indistinguishable from those dried only by evaporation, as shown in Fig.
It should be noted that more ends and elongated ellipsoids can be observed from the iPP nanofibers with lower hot-drawn ratios of 2 and 8, while the nanofibers prepared from a hot-draw
ratio of 25 showed continuous forms.