1.In event of melt electrospinning and subsequent comparison
of the spun fibers with the macroscopic molded films, the
differences in the conditions of their production are not so
obvious and related to heat dissipation more likely, that is, by
cooling specification of fibers and films.As it
can show in Figure 1A,B the averaged diameters of the fibers
coincide well with the newly obtained results on the diameter
dimensions which are equal to  10 um and 12.2 um respectively
obtained by SEM and AFM techniques.[16]
The variance in structure-morphology characteristics of
polymer fibers obtained via classical solvent electrospinning
and corresponding films obtained via solution casting could be
explained by the discrepancy in the formation conditions and
primarily by the difference of solvent evaporation conditions.Almost at the same SEM magnification the surface of
the molded films with the analogues PHB/PLA proportion looks
lightly structured with uneven Pt-shading density that corresponds to the alternation of petty bulges and notches.For instance, in the work[17] it was
stated that for the nanofibers under electrospinning conditions
the time of desorption should take several millisecond, while
solvent evaporation from the films with analogous content is
gradually performed for essentially longer time, namely dozens
of hours and even more.Additionally, the
surface of filaments is quite perfect and has not visible cracks
and pores.