Abstract
Electrospun polymer nanofibers demonstrate outstanding mechanical and unusual thermodynamic properties as compared to macroscopic-scale structures. Now-a-days is wide accepted that these features are attributed to nanofiber microstructure (Arinstein et al. Nat Nanotechnol 2:59–62, 2007, [1]). It is clear that this microstructure is formed during the electrospinning process characterized by a high stretching rate and rapid evaporation. The first circumstance (high stretching rate) results in formation of non-equilibrium supermolecular structure; whereas the second one (rapid evaporation) provides the fixing of the formed internal non-equilibrium structure of electrospun polymer nanofibers. Thus, when studying microstructure formation, its fast evolution must be taken into account.
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