Hierarchical‐structure‐dependent high ductility of electrospun polyoxymethylene nanofibers. Issue 8 (27th September 2018)

• Record Type: Journal Article
• Authors: Hu, Ruirui; Gao, Enlai; Xu, Zhiping; Liu, Luqi; Wang, Guorui; Zhu, Hongwei; Zhang, Zhong
• Is Part Of: Journal of applied polymer science. Volume 136:Issue 8(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-09-27
• Subjects: electrospinning -- fibers -- mechanical properties -- morphology; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.47086
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Two types of electrospun polyoxymethylene nanofibers with rough and smooth surface morphologies [rough fibers (RFs) and smooth fibers (SFs), respectively] were successfully prepared via the control of the electrospinning voltages. Mechanical tensile tests showed that the RF nonwoven mats exhibited a much higher elongation (440%) than the SFs (180%) without sacrifices in the stiffness and strength. Scanning electron microscopy characterization revealed that the large ductility of a single RF resulted from its unique multiple‐necking mode, which was induced by its rippled structural features. In the meantime, the large ductility led to a high molecular orientation under tension and further improved the strength and toughness of the RF nonwoven mats. In comparison, the SF behaved in a single‐necking deformation mode, and this led to a rapid rupture behavior. This surface‐morphology‐dependent mechanical behavior helped us to deeply understand the relationship between the structure and properties and should guide the development of high‐performance materials for load‐bearing applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019, 136, 47086. Abstract :