Nanomechanical thermal analysis of electrospun polymer fibers

Thermomechanical properties of individual electrospun semicrystalline polyethylene oxide (PEO) fibers were measured using atomic force microscopy based indentation. Fibers showed a higher elastic modulus than corresponding films despite a lower crystallinity, indicating significant molecular alignme...

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Bibliographic Details
Published in:Applied physics letters 2008-11, Vol.93 (20), p.201907-201907-3
Main Authors: Wang, Wei, Bushby, Andrew J., Barber, Asa H.
Format: Article
Language:English
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Summary:Thermomechanical properties of individual electrospun semicrystalline polyethylene oxide (PEO) fibers were measured using atomic force microscopy based indentation. Fibers showed a higher elastic modulus than corresponding films despite a lower crystallinity, indicating significant molecular alignment along the principle fiber axis. Heating of the fibers gave a progressive loss in elastic modulus highlighting a dominant amorphous thermomechanical response. This is in contrast to softening of an amorphous phase and melting of a crystalline phase in semicrystalline bulk PEO films.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3033222