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Micromechanical properties and ductile behavior of electrospun polystyrene nanofibers
Author(s) -
Asran A. Sh.,
Seydewitz V.,
Michler G. H.
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34847
Subject(s) - materials science , necking , composite material , scanning electron microscope , nanofiber , polystyrene , ultimate tensile strength , deformation (meteorology) , electrospinning , transmission electron microscopy , fiber , tension (geology) , synthetic fiber , polymer , nanotechnology
Using electrospinning technique polystyrene (PS) nanofibers in the thickness range from 150 to 800 nm have been produced. Electron microscope inspections reveal the relatively uniform thickness of the obtained fibers. The mechanical deformation mechanisms have been studied in tension tests using micro‐tensile devices for a scanning electron microscope (SEM) and a transmission electron microscope (TEM). A characteristic change in the deformation behavior from the typical craze formation of PS to a micro necking and cold drawing has been found with decreasing fiber thickness. There is a surprisingly sharp fiber thickness limit between both deformation types in the range of 220–225 nm: nanofibers thicker than ∼ 225 nm deform with formation of crazes, nanofibers thinner than ∼ 225 nm show necking and cold drawing. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012