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Orientation analysis of individual electrospun PE nanofibers by transmission electron microscopy

Authors
Journal
Polymer
0032-3861
Publisher
Elsevier
Publication Date
Volume
51
Issue
11
Identifiers
DOI: 10.1016/j.polymer.2010.03.031
Keywords
  • Electrospinning
  • Molecular Orientation
  • Shish-Kebab Structure

Abstract

Abstract A systematic orientation analysis of individual electrospun polyethylene (PE) nanofibers was performed by transmission electron microscopy (TEM). PE nanofibers with a wide diameter distribution, ranging from 150 nm to several micrometers, and a variety of morphologies, including cylindrical, beaded- and ribbon-like fibers, were produced by the high-temperature solution electrospinning. In each fiber, crystalline orientation and its morphology were investigated by TEM. In the cylindrical fibers, development of fiber structure was strongly related to the fiber diameter. Depending on the diameter, three different structural models based on 1) the random-oriented crystalline structure, 2) the shish-kebab structure, and 3) the fibrillar structure composed of extended-chain crystals were proposed. In addition, orientation analysis of beaded fibers and that of ribbon-like fibers was also performed.

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