Nanomechanical thermal analysis of electrospun polymer fibers

Wei Wang; Bushby, Andrew J.; Barber, Asa H.
November 2008
Applied Physics Letters;11/17/2008, Vol. 93 Issue 20, p201907
Academic Journal
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.


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