期刊
POLYMER
卷 52, 期 10, 页码 2295-2301出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2011.03.041
关键词
Electrospinning; Nylon; Nanofiber
资金
- U.S. Army through the Institute for Soldier Nanotechnologies (ISN) [ARO W911NF-07-D-0004]
- U.S. Army Research Office
Young's modulus and yield strength of individual electrospun fibers of poly(trimethyl hexamethylene terephthalamide) (PA 6(3)T) have been obtained in uniaxial extension. The Young's modulus is found to exhibit values in excess of the isotropic bulk value, and to increase with decreasing fiber diameter for fibers with diameter less than roughly 500 nm. The yield stress is also found to increase with decreasing fiber diameter. These trends are shown to correlate with increasing molecular level orientation within the fibers with decreasing fiber diameter. Using Ward's aggregate model, the correlation between molecular orientation and fiber modulus can be explained, and reasonable determinations of the elastic constants of the molecular unit are obtained. (C) 2011 Elsevier Ltd. All rights reserved.
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