Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 29, Issue 10, Pages 826-831Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200700873
Keywords
annealing; fibers; mechanical properties; orientation; strength
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A new route to high-performance electrospun polymer fibers was developed using a self-bundling electrospinning technique combined with post-treatments such as stretching and annealing under conditions similar to those used for conventional fibers. Self-bundled electrospun PAN fiber yarns were characterized by SEM, mechanical tests, polarized FT-IR spectroscopy and WAXD. The obtained results revealed that the PAN nanofiber yarns possessed enhanced alignment, a higher degree of crystallinity and higher molecular orientation after treatments, resulting in a remarkable improvement in mechanical performance, approaching the strength value of the corresponding conventional fibers.
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