Influence of Take-up Speeds on the Structure, Properties and Dyeability of Novel Polyamide 5,6 As-spun Fibers

  • Yassir A. Eltahir1, 1College of Materials Science and Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 North Renmin Road,

Abstract

Polyamide 5,6 (PA56) as-spun fibers were successfully prepared by melt spinning process and the effects of different take-up speeds on their thermal properties, crystalline structure and dyeability were investigated by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), dynamic mechanical thermal analysis (DMTA), sonic velocity and color strength measurements. DSC results revealed that the glass transition temperature (Tg) of PA56 as-spun fibers increased, while the melting temperature showed no considerable variation with the take-up speed. DMTA results demonstrated that the storage modulus increased, while the peak height of tan δ decreased with take-up speeds. The equatorial (WAXD) pattern of PA56 shows α-like structure, as observed for other odd-even nylons such as nylon 5,10, nylon 9,2 and so on. It is also found that the relative crystallinity, apparent crystal sizes and molecular orientation of PA56 as-spun fibers increased with take-up speeds. As a result, the dyebath exhaustion and color strength (K/S) values decreased with the take-up speeds.

Published
2019-07-03
How to Cite
A. ELTAHIR1,, Yassir. Influence of Take-up Speeds on the Structure, Properties and Dyeability of Novel Polyamide 5,6 As-spun Fibers. Gezira Journal of Engineering and Applied Sciences, [S.l.], v. 14, n. 1, july 2019. ISSN 1858-5698. Available at: <http://journals.uofg.edu.sd/index.php/gjeas/article/view/1313>. Date accessed: 20 oct. 2019.
Section
Articles